Yamaha F350 User manual

Read this manual carefully before operating this
outboard motor.
OWNER’S MANUAL
F350
LF350
LIT-18626-11-25
6AW-28199-3B-E0
6AW-9-3B-1E.book 1 ページ ２０１６年２月１５日 月曜日 午前１１時９分

EMU25064
ZMU07696
Les gaz d’échappement du moteur de ce produit
contiennent des substances chimiques connues
dans l’État de Californie pour provoquer le cancer,
des anomalies congénitales et des troubles de la
reproduction.
Read this manual carefully before operating this outboard motor. Keep this manual onboard in a
waterproof bag when boating. This manual should stay with the outboard motor if it is sold.
6AW-9-3B-1E.book 1 ページ ２０１６年２月１５日 月曜日 午前１１時９分

Important manual information
EMU44141
To the owner
Thank you for selecting a Yamaha outboard motor. This
Owner’s Manual contains information needed for proper op-
eration, maintenance and care. A thorough understanding
of these simple instructions will help you obtain maximum
enjoyment from your new Yamaha. If you have any question
about the operation or maintenance of your outboard motor,
please consult a Yamaha dealer.
In this Owner’s Manual particularly important information is
distinguished in the following ways.
: This is the safety alert symbol. It is used to alert you
to potential personal injury hazards. Obey all safety mes-
sages that follow this symbol to avoid possible injury or
death.
EWM00782
A WARNING indicates a hazardous situation which, if
not avoided, could result in death or serious injury.
ECM00702
A NOTICE indicates special precautions that must be
taken to avoid damage to the outboard motor or other
property.
TIP:
A TIP provides key information to make procedures easier
or clearer.
Yamaha continually seeks advancements in product design
and quality. Therefore, while this manual contains the most
current product information available at the time of printing,
there may be minor discrepancies between your machine
and this manual. If there is any question concerning this
manual, please consult your Yamaha dealer.
To ensure long product life, Yamaha recommends that you
use the product and perform the specified periodic inspec-
tions and maintenance by correctly following the instruc-
tions in the owner’s manual. Any damage resulting from
neglect of these instructions is not covered by warranty.
Some countries have laws or regulations restricting users
from taking the product out of the country where it was pur-
chased, and it may be impossible to register the product in
the destination country. Additionally, the warranty may not
apply in certain regions. When planning to take the product
to another country, consult the dealer where the product
was purchased for further information.
If you purchased this outboard motor used, see your
Yamaha dealer to have it registered in your name in
Yamaha records.
TIP:
The F350CC, LF350CC and the standard accessories are
used as a base for the explanations and illustrations in this
manual. Therefore some items may not apply to every mod-
el.
EMU44151
F350, LF350
OWNER’S MANUAL
©2016 by Yamaha Motor Co., Ltd.
1st Edition, February 2016
All rights reserved.
Any reprinting or unauthorized use
without the written permission of
Yamaha Motor Co., Ltd.
is expressly prohibited.
Printed in Japan
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Table of contents
Safety information..................................................1
Outboard motor safety ..........................................1
Propeller......................................................................1
Rotating parts..............................................................1
Hot parts .....................................................................1
Electric shock..............................................................1
Power trim and tilt .......................................................1
Engine shut-off cord (lanyard).....................................1
Gasoline......................................................................1
Gasoline exposure and spills ......................................1
Carbon monoxide........................................................1
Modifications ...............................................................1
Boating safety .......................................................1
Alcohol and drugs .......................................................1
Personal flotation devices (PFDs)...............................1
People in the water .....................................................1
Passengers .................................................................1
Overloading.................................................................2
Avoid collisions ...........................................................2
Weather ......................................................................2
Accident reporting .......................................................2
Boat education and training ........................................2
Passenger training ......................................................2
Boating safety publications .........................................2
Laws and regulations ..................................................2
Boating organizations ...........................................2
Basic boating rules (Rules of the road).................3
Steering and sailing rules and sound signals..............3
Rules when encountering vessels ..............................3
Other special situations...............................................4
General information ...............................................6
Identification numbers record................................6
Outboard motor serial number ....................................6
Digital electronic control serial number .......................6
Key number.................................................................6
EC Declaration of Conformity (DoC).....................7
CE Marking ...........................................................7
Compliance mark and manufactured date label ...7
Read manuals and labels .....................................9
Warning labels ...........................................................9
Specifications and requirements........................12
Specifications......................................................12
Installation requirements.....................................13
Boat horsepower rating.............................................13
Mounting motor .........................................................13
Digital electronic control requirements ................13
Battery requirements...........................................13
Battery specifications ................................................13
Propeller selection ..............................................14
Counter rotation models............................................14
Start-in-gear protection ....................................... 14
Engine oil requirements ......................................14
Fuel requirements ...............................................14
Gasoline....................................................................14
Gasoline Additives ....................................................15
Anti-fouling paint .................................................15
Outboard motor disposal requirements............... 16
Emergency equipment ........................................16
Emission control information ............................. 16
Star labels ................................................................ 16
Components......................................................... 18
Components diagram ......................................... 18
Optional items .......................................................... 19
Yamaha Security System (Y-COP).......................... 21
Digital electronic control........................................... 21
Digital electronic control-active indicator.................. 21
Digital electronic control-alert indicator .................... 22
Control lever............................................................. 22
Neutral interlock trigger............................................ 23
Free throttle switch................................................... 23
Throttle friction adjuster ........................................... 24
Engine selector switch ............................................. 25
Engine shut-off cord (lanyard) and clip .................... 25
Main switch .............................................................. 26
Start/Stop switch panel ............................................ 26
All Start/Stop switch panel ....................................... 27
Power trim and tilt switch on digital electronic
control................................................................... 27
Power trim and tilt switch on bottom cowling ........... 27
Power trim and tilt switches ..................................... 27
Tilt limiter.................................................................. 28
Tilt support lever for power trim and tilt model ......... 28
Cowling lock lever .................................................... 28
Flushing device ........................................................ 28
Fuel filter .................................................................. 29
Instruments and indicators................................. 30
6Y9 Multifunction Color Gauge........................... 30
Yamaha Security System indicator (optional) .......... 30
Engine warm-up indicator ........................................ 30
Engine synchronization indicator ............................. 30
Overheat alert .......................................................... 30
Low oil pressure-alert............................................... 31
Water separator alert ............................................... 31
Low battery voltage-alert.......................................... 31
Engine trouble alert.................................................. 32
6YC Multifunction meter ..................................... 32
6Y8 Multifunction meters .................................... 34
Engine control system ........................................ 37
Alert system ........................................................ 37
Digital Electronic Control alert.................................. 37
Overheat alert .......................................................... 37
Low oil pressure alert............................................... 38
Water separator alert ............................................... 39
Installation............................................................ 40
Installation .......................................................... 40
Mounting the outboard motor................................... 40
Operation.............................................................. 41
First-time operation............................................. 41
Fill engine oil ............................................................ 41
Breaking in engine ................................................... 41
Getting to know your boat ........................................ 41
Checks before starting engine............................ 41
Fuel level.................................................................. 41
Removing top cowling.............................................. 41
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Table of contents
Fuel system...............................................................42
Controls.....................................................................42
Engine shut-off cord (lanyard)...................................42
Engine oil ..................................................................42
Engine.......................................................................43
Flushing device .........................................................43
Installing top cowling.................................................43
Checking power trim and tilt system .........................44
Battery.......................................................................44
Filling fuel ...........................................................44
Operating engine ................................................45
Sending fuel ..............................................................45
Starting engine..........................................................45
Checks after starting engine ...............................47
Cooling water ............................................................47
Warming up engine.............................................47
Electric start models..................................................47
Checks after engine warm up .............................47
Shifting ......................................................................47
Stop switches............................................................47
Selecting outboard motor (triple engine).............48
Shifting ................................................................49
Stopping boat......................................................50
Operating the port / center / starboard engine ....50
Boat direction ......................................................53
Trolling ................................................................55
Adjusting trolling speed.............................................55
Stopping engine ..................................................55
Procedure for stopping engine..................................55
Trimming outboard motor....................................56
Adjusting trim angle (Power trim and tilt) ..................56
Adjusting boat trim ....................................................57
Tilting up and down.............................................57
Procedure for tilting up (power trim and
tilt models) .............................................................57
Procedure for tilting down (power trim and
tilt models) .............................................................58
Shallow water .....................................................59
Power trim and tilt models.........................................59
Operating in other conditions ..............................60
Maintenance .........................................................61
Transporting and storing outboard motor............61
Storing outboard motor .............................................61
Conditioning and stabilizing gasoline........................61
Procedure .................................................................61
Lubrication ................................................................61
Cleaning and anticorrosion measures ......................62
Flushing power unit...................................................62
Checking painted surface of outboard motor ............62
Periodic maintenance .........................................62
Replacement parts....................................................62
Maintenance interval guidelines................................63
Maintenance chart 1 .................................................64
Maintenance chart 2 .................................................65
Maintenance chart 3 .................................................65
Greasing ...................................................................66
Inspecting spark plug ................................................66
Inspecting engine idle speed ....................................67
Changing engine oil ..................................................68
Inspecting wiring and connectors..............................68
Checking propeller ................................................... 68
Removing propeller.................................................. 68
Installing propeller.................................................... 69
Changing gear oil..................................................... 69
Inspecting and replacing anode(s)........................... 70
Checking battery (for electric start models) ............. 71
Connecting the battery............................................. 71
Disconnecting the battery ........................................ 72
Storing the battery.................................................... 72
Trouble Recovery ................................................ 73
Troubleshooting.................................................. 73
Temporary action in emergency ......................... 75
Impact damage ........................................................ 75
Running in an emergency (multiple engines)........... 75
Replacing fuse ......................................................... 75
Power trim and tilt will not operate ........................... 76
Water separator-alert indicator blinks while
cruising ................................................................. 76
Treatment of submerged motor .......................... 77
Consumer information (For North America) ..... 78
YAMAHA FOUR-STROKE OUTBOARD
MOTOR THREE-YEAR LIMITED
WARRANTY .................................................... 78
IMPORTANT WARRANTY INFORMATION IF
YOU USE YOUR YAMAHA OUTSIDE THE
U.S.A. OR CANADA........................................ 80
INDEX.................................................................... 81
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1
Safety information
EMU33623
Outboard motor safety
Observe these precautions at all times.
EMU36502
Propeller
People can be injured or killed if they come in contact with
the propeller. The propeller can keep moving even when the
motor is in neutral, and sharp edges of the propeller can cut
even when stationary.
Stop the engine when a person is in the water near you.
Keep people out of reach of the propeller, even when the
engine is off.
EMU33631
Rotating parts
Hands, feet, hair, jewelry, clothing, PFD straps, etc. can be-
come entangled with internal rotating parts of the engine,
resulting in serious injury or death.
Keep the top cowling in place whenever possible. Do not re-
move or replace the cowling with the engine running.
Only operate the engine with the cowling removed accord-
ing to the specific instructions in the manual. Keep hands,
feet, hair, jewelry, clothing, PFD straps, etc. away from any
exposed moving parts.
EMU33641
Hot parts
During and after operation, engine parts are hot enough to
cause burns. Avoid touching any parts under the top cowl-
ing until the engine has cooled.
EMU33651
Electric shock
Do not touch any electrical parts while starting or operating
the engine. They can cause shock or electrocution.
EMU33661
Power trim and tilt
Body parts can be crushed between the motor and the
clamp bracket when the motor is trimmed or tilted. Keep
body parts out of this area at all times. Be sure no one is in
this area before operating the power trim and tilt mecha-
nism.
The power trim and tilt switches operate even when the
main switch is off. Keep people be away from the switches
whenever working around the motor.
Never get under the lower unit while it is tilted, even when
the tilt support lever is locked. Severe injury could occur if
the outboard motor accidentally falls.
EMU33672
Engine shut-off cord (lanyard)
Attach the engine shut-off cord so that the engine stops if
the operator falls overboard or leaves the helm. This pre-
vents the boat from running away under power and leaving
people stranded, or running over people or objects.
Always attach the engine shut-off cord to a secure place on
your clothing or your arm or leg while operating. Do not re-
move it to leave the helm while the boat is moving. Do not
attach the cord to clothing that could tear loose, or route the
cord where it could become entangled, preventing it from
functioning.
Do not route the cord where it is likely to be accidentally
pulled out. If the cord is pulled during operation, the engine
will shut off and you will lose most steering control. The boat
could slow rapidly, throwing people and objects forward.
EMU33811
Gasoline
Gasoline and its vapors are highly flammable and ex-
plosive. Always, refuel according to the procedure on page
45 to reduce the risk of fire and explosion.
EMU33821
Gasoline exposure and spills
Take care not to spill gasoline. If gasoline spills, wipe it up
immediately with dry rags. Dispose of rags properly.
If any gasoline spills onto your skin, immediately wash with
soap and water. Change clothing if gasoline spills on it.
If you swallow gasoline, inhale a lot of gasoline vapor, or get
gasoline in your eyes, get immediate medical attention.
Never siphon fuel by mouth.
EMU33901
Carbon monoxide
This product emits exhaust gases which contain carbon
monoxide, a colorless, odorless gas which may cause brain
damage or death when inhaled. Symptoms include nausea,
dizziness, and drowsiness. Keep cockpit and cabin areas
well ventilated. Avoid blocking exhaust outlets.
EMU33781
Modifications
Do not attempt to modify this outboard motor. Modifications
to your outboard motor may reduce safety and reliability,
and render the outboard unsafe or illegal to use.
EMU33741
Boating safety
This section includes a few of the many important safety
precautions that you should follow when boating.
EMU33711
Alcohol and drugs
Never operate after drinking alcohol or taking drugs. Intoxi-
cation is one of the most common factors contributing to
boating fatalities.
EMU40281
Personal flotation devices (PFDs)
Have an approved PFD on board for every occupant.
Yamaha recommends that you must wear a PFD whenever
boating. At a minimum, children and non-swimmers should
always wear PFDs, and everyone should wear PFDs when
there are potentially hazardous boating conditions.
EMU33732
People in the water
Always watch carefully for people in the water, such as
swimmers, skiers, or divers, whenever the engine is run-
ning. When someone is in the water near the boat, shift into
neutral and stop the engine.
Stay away from swimming areas. Swimmers can be hard to
see.
The propeller can keep moving even when the motor is in
neutral. Stop the engine when a person is in the water near
you.
EMU33752
Passengers
Consult your boat manufacturer’s instructions for details
about appropriate passenger locations in your boat and be
sure all passengers are positioned properly before acceler-
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Safety information
2
ating and when operating above an idle speed. Standing or
sitting in non-designated locations may result in being
thrown either overboard or within the boat due to waves,
wakes, or sudden changes in speed or direction. Even
when people are positioned properly, alert your passengers
if you must make any unusual maneuver. Always avoid
jumping waves or wakes.
EMU33762
Overloading
Do not overload the boat. Consult the boat capacity plate or
boat manufacturer for maximum weight and number of pas-
sengers. Be sure that weight is properly distributed accord-
ing to the boat manufacturer’s instructions. Overloading or
incorrect weight distribution can compromise the boats han-
dling and lead to an accident, capsizing or swamping.
EMU33773
Avoid collisions
Scan constantly for people, objects, and other boats. Be
alert for conditions that limit your visibility or block your vi-
sion of others.
Operate defensively at safe speeds and keep a safe dis-
tance away from people, objects, and other boats.
Do not follow directly behind other boats or waterskiers.
Avoid sharp turns or other maneuvers that make it hard
for others to avoid you or understand where you are go-
ing.
Avoid areas with submerged objects or shallow water.
Ride within your limits and avoid aggressive maneuvers
to reduce the risk of loss of control, ejection, and collision.
Take early action to avoid collisions. Remember, boats do
not have brakes, and stopping the engine or reducing
throttle can reduce the ability to steer. If you are not sure
that you can stop in time before hitting an obstacle, apply
throttle and turn in another direction.
EMU33791
Weather
Stay informed about the weather. Check weather forecasts
before boating. Avoid boating in hazardous weather.
EMU44161
Accident reporting
Boat operators are required by law to file a Boating Accident
Report with their boating law enforcement agency if their
boat is involved in any of the following accidents:
1. There is loss of life or probable loss of life.
2. There is personal injury that requires medical attention
beyond first aid.
3. There is property damage to boats or other property
over a certain amount.
4. There is complete loss of a boat.
Contact local law enforcement personnel if a report is nec-
essary.
EMU44171
Boat education and training
For U.S.A.
Operators should take a boating safety course. This may be
required in your state. Many of the organizations listed in
the next section can provide information about courses in
your area.
You may also want to consider an Internet-based program
for basic boater education. The Online Boating Safety
Course provided by the BoatU.S. Foundation, is approved
by the National Association of State Boating Law Adminis-
trators (NASBLA) and recognized by the United States
Coast Guard. Most, but not all, states accept this course to
meet their minimum requirements. While it cannot replace
an in-depth course such as one offered by the U.S. Coast
Guard, U.S. Power Squadron, or other organization, this on-
line course does provide a general overview of the basics in
boating safety, requirements, navigation, and operation.
Upon successful completion of the course, the user can
download a certificate of completion immediately or, for a
small charge, request one by mail. To take this free course,
go to boatus.org.
For Canada
All operators of pleasure craft must illustrate competency by
means of a Pleasure Craft Operators Card with the excep-
tion of Personal Water Craft used for rental purposes which
require a rental checklist be completed. Pleasure Craft Op-
erators Cards can be obtained following the completion of a
competency course, with an on-line option. Details can be
found on Transport Canada’s website. www.tc.gc.ca
EMU33881
Passenger training
Make sure at least one other passenger is trained to oper-
ate the boat in the event of an emergency.
EMU33891
Boating safety publications
Be informed about boating safety. Additional publications
and information can be obtained from many boating organi-
zations.
EMU33591
Laws and regulations
Know the marine laws and regulations where you will be
boating- and obey them. Several sets of rules prevail ac-
cording to geographic location, but all are basically the
same as the International Rules of the Road. The rules pre-
sented in the following section are condensed- and have
been provided for your convenience only.
Contact the U.S. Coast Guard, the National Association of
State Boating Law Administrators, or your local Power
Squadron for a complete set of rules governing the waters
in which you will be using your boat.
EMU44740
Boating organizations
The following organizations provide boating safety training
and information about boating safety and laws.
ZMU06025
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Safety information
3
In the U.S.A.
United States Coast Guard
Consumer Affairs Staff (G-BC)
Office of Boating, Public, and Consumer Affairs
U.S. Coast Guard Headquarters
Washington, D.C. 20593-0001
http://www.uscgboating.org/
United States Power Squadrons
1-888-FOR-USPS (1-888-367-8777)
http://www.usps.org/
Boat Owners Association of The United States
1-800-336-BOAT (1-800-336-2628)
http://www.boatus.com/
National Association of State Boating Law Administra-
tors (NASBLA)
1500 Leestown Road, Suite 330
Lexington, KY 40511 859-225-9497
http://www.nasbla.org/
National Marine Manufacturers Association (NMMA)
200 East Randolph Drive
Suite 5100
Chicago, IL 60601
http://www.nmma.org/
Marine Retailers Association of America
155 N. Michigan Ave. Chicago,
IL 60304
http://www.mraa.com/
In Canada
National Marine Manufacturers Association Canada
14 McEwan Drive
Suite 8
Bolton, ON
L7E 1H1
http://www.nmma.org/
In Australia
Boating Industry Association of Australia
http://www.biaa.com.au/
In New Zealand
NZ Marine Industry Association
http://www.nzmarine.com/
EMU33692
Basic boating rules (Rules of the road)
Just as there are rules that apply when you are driving on
streets and highways, there are waterway rules that apply
when you are driving your boat. These rules are used inter-
nationally. (For U.S.A.: and are also enforced by the United
States Coast Guard and local agencies.) You should be
aware of these rules, and follow them whenever you en-
counter another vessel on the water.
EMU33702
Steering and sailing rules and sound signals
Whenever two vessels on the water meet one another, one
vessel has the right-of-way; it is called the “stand-on” ves-
sel. The vessel that does not have the right-of-way is called
the “give-way” or “burdened” vessel. These rules determine
which vessel has the right-of-way, and what each vessel
should do.
Stand-on vessel
The vessel with the right-of-way has the duty to continue its
course and speed, except to avoid an immediate collision.
When you maintain your direction and speed, the other ves-
sel will be able to determine how best to avoid you.
Give-way vessel
The vessel that does not have the right-of-way has the duty
to take positive and timely action to stay out of the way of
the Stand-On vessel. Normally, you should not cross in front
of the vessel with the right-of-way. You should slow down or
change directions briefly and pass behind the other vessel.
You should always move in such a way that the operator of
the other vessel can see what you are doing.
“The general prudential rule”
This rule is called Rule 2 in the International Rules and
says,
“In obeying and construing these rules due regard shall be
had to all dangers of navigation and collision, and to any
special circumstances, which may render a departure from
the above rules necessary in order to avoid immediate dan-
ger.”
In other words, follow the standard rules except when a col-
lision will occur unless both vessels try to avoid each other.
If that is the case, both vessels become “Give-Way” ves-
sels.
EMU25522
Rules when encountering vessels
There are three main situations that you may encounter with
other vessels which could lead to a collision unless the
Steering Rules are followed:
Meeting: (you are approaching another vessel head-on)
Crossing: (you are traveling across the other vessel’s path)
Overtaking: (you are passing or being passed by another
vessel)
In the following illustration, your boat is in the center. You
should give the right-of-way to any vessels shown in white
area (you are the Give-Way vessel). Any vessels in the
shaded area must yield to you (they are the Give-Way ves-
sels). Both you and the meeting vessel must alter course to
avoid each other.
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Safety information
4
Meeting
If you are meeting another power vessel head on, and are
close enough to run the risk of collision, neither of you has
the right-of-way Both of you should alter course to avoid an
accident. You should keep the other vessel on your port
(left) side. This rule doesn’t apply if both of you will clear one
another if you continue on your set course and speed.
Crossing
When two power driven vessels are crossing each other’s
path close enough to run the risk of collision, the vessel
which has the other on the starboard (right) side must keep
out of the way of the other. If the other vessel is on your
right, you must keep out of its way; you are the Give-Way
vessel. If the other vessel is on your port (left) side, remem-
ber that you should maintain course and direction, provided
the other vessel gives you the right-of-way as it should.
Overtaking
If you are passing another vessel, you are the “Give-Way”
vessel. This means that the other vessel is expected to
maintain its course and speed. You must stay out of its way
until you are clear of it. Likewise, if another vessel is passing
you, you should maintain your speed and direction so that
the other vessel can steer itself around you.
EMU25532
Other special situations
There are three other rules you should be aware of when
driving your boat around other vessels.
Narrow channels and bends
When navigating in narrow channels, you should keep to
the right when it is safe and practical to do so. If the operator
of a power-driven vessel is preparing to go around a bend
that may obstruct the view of other water vessels, the oper-
ator should sound a prolonged blast on the whistle (4 to 6
seconds). If another vessel is around the bend, it too should
sound the whistle. Even if no reply is heard, however, the
vessel should still proceed around the bend with caution. If
you navigate such waters with your boat, you will need to
carry a portable air horn, available from local marine supply
stores.
Fishing vessel right-of-way
All vessels that are fishing with nets, lines or trawls are con-
sidered to be “fishing vessels” under the International
Rules. Vessels with trolling lines are not considered fishing
vessels. Fishing vessels have the right-of-way regardless of
position. Fishing vessels cannot, however, impede the pas-
sage of other vessels in narrow channels.
Sailing vessel right-of-way
Sailing vessels should normally be given the right-of-way.
The exceptions to this are:
1. When the sailing vessel is overtaking the power-driven
vessel, the power-driven vessel has the right-of-way.
2. Sailing vessels should keep clear of any fishing vessel.
3. In a narrow channel, a sailing vessel should not hamper
the safe passage of a power-driven vessel that can
navigate only in such a channel.
Reading buoys and other markers
The waters of the United States are marked for safe naviga-
tion by the lateral system of buoyage. Simply put, buoys and
markers have an arrangement of shapes, colors, numbers
and lights to show which side of the buoy a boater should
pass on when navigating in a particular direction. The mark-
ings on these buoys are oriented from the perspective of be-
ing entered from seaward (the boater is going towards the
port). This means that red buoys are passed on the star-
board (right) side when proceeding from open water into
port, and black buoys are to port (left) side. When navigat-
ing out of port, your position with respect to the buoys
should be reversed; red buoys should be to port and black
buoys to starboard.
Many bodies of water used by boaters are entirely within the
boundaries of a particular state. The Uniform State Water-
way Marking System has been devised for these waters.
This system uses buoys and signs with distinctive shapes
and colors to show regulatory or advisory information.
These markers are white with black letters and orange
boarders. They signify speed zones, restricted areas, dan-
ger areas, and general information.
Remember, markings may vary by geographic location. Al-
ways consult local boating authorities before driving your
boat in unfamiliar waters.
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Safety information
5
ZMU01708
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6
General information
EMU25172
Identification numbers record
EMU25186
Outboard motor serial number
The outboard motor serial number is stamped on the label
attached to the port side of the clamp bracket.
Record your outboard motor serial number in the spaces
provided to assist you in ordering spare parts from your
Yamaha dealer or for reference in case your outboard motor
is stolen.
EMU34944
Digital electronic control serial number
The digital electronic control serial number is stamped on
the label attached to the digital electronic control box.
Record your digital electronic control serial number in the
spaces provided to assist you in newly connecting the digi-
tal electronic control to the outboard motor.
TIP:
Consult your Yamaha dealer if you have any questions con-
cerning the digital electronic control serial number. EMU25192
Key number
If a main key switch is equipped with the motor, the key
identification number is stamped on your key as shown in
the illustration. Record this number in the space provided
for reference in case you need a new key.
1. Outboard motor serial number location
1. Serial number
2. Model name
3. Motor transom height
4. Approved model code
1
ZMU05814
3412
ZMU01692
ZMU06224
1
1. Digital electronic control serial number loca-
tion
1. Serial number
2. Type
3. Approved model code
ZMU05885
1
ZMU05887
1
ZMU05958
1
231
ZMU05917
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General information
7
EMU38981
EC Declaration of Conformity (DoC)
This declaration is included with outboard motors that con-
form to European regulations.
This outboard motor conforms to certain portions of the Eu-
ropean Parliament directive relating to machinery.
Each conformed outboard motor accompanied with EC
DoC.EC DoC contains the following information;
Name of Engine Manufacture
Model name
Product code of model (Approved model code)
Code of conformed directives
EMU38995
CE Marking
This label is affixed to outboard motors that conform to Eu-
ropean regulations.
Outboard motors affixed with this “CE” marking conform
with the directives of; 2006/42/EC, 94/25/EC - 2003/44/EC,
2014/30/EU, and 2004/108/EC, 2013/53/EU.
EMU46132
Compliance mark and manufactured date
label
Engines affixed with this label conform to the regulations for
each country.
This label is affixed to the clamp bracket or swivel bracket.
Regulatory Compliance Mark (RCM)
Engines affixed with this mark conform to certain portion(s)
of the Australian Radio Communications Act.
ICES-002 Compliance Label
Engines affixed with this mark meet all requirements of the
Canadian Interference Causing Equipment Regulations.
1. Key number
1. CE marking location
1
ZMU01694
1
ZMU07133
ZMU08050
1
1. Compliance mark and manufactured date
label location
1. Regulatory Compliance Mark (RCM)
ZMU06040
1ZMU08211
ZMU08190
1
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General information
8
Manufactured date
The manufactured date is stamped on the label for the en-
gines that conform to the regulations for U.S. Environmental
Protection Agency (EPA). The models that manufactured
exclusively for the Oceanian countries may not have manu-
factured date on the label.
1. ICES-002 Compliance Label
1. Manufactured date
ZMU08191
1
ZMU08192
1
6AW-9-3B-1E.book 8 ページ ２０１６年２月１５日 月曜日 午前１１時９分

General information
9
EMU33524
Read manuals and labels
Before operating or working on this outboard motor:
Read this manual.
Read any manuals supplied with the boat.
Read all labels on the outboard motor and the boat.
If you need any additional information, contact your Yamaha dealer.
EMU33836
Warning labels
If these labels are damaged or missing, contact your Yamaha dealer for replacements.
3
2
1
ZMU05950
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General information
10
EMU34652
Contents of labels
The above warning labels mean as follows.
1
EWM01682
Keep hands, hair, and clothing away from rotating
parts while the engine is running.
Do not touch or remove electrical parts when starting
or during operation.
2
EWM01672
Read Owner’s Manuals and labels.
Wear an approved personal flotation device (PFD).
Attach engine shut-off cord (lanyard) to your PFD,
arm, or leg so the engine stops if you accidentally
leave the helm, which could prevent a runaway boat.
EMU33851
Other labels
6EE-G2794-40
6EE-H1994-40
12
6EE-G2794-50
6EE-H1994-50
ZMU06191
3
ZMU05710
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General information
11
EMU35133
Symbols
The following symbols mean as follows.
Notice/Warning
Read Owner’s Manual
Hazard caused by continuous rotation
Electrical hazard
ZMU05696
ZMU05664
ZMU05665
ZMU05666
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12
Specifications and requirements
EMU34522
Specifications
TIP:
“(AL)” stated in the specification data below represents the
numerical value for the aluminum propeller installed.
Likewise, “(SUS)” represents the value for stainless steel
propeller installed and “(PL)” for plastic propeller installed.
EMU2821V
Dimension and weight:
Overall length:
1029 mm (40.5 in)
Overall width:
633 mm (24.9 in)
Overall height X:
2006 mm (79.0 in)
Overall height U:
2133 mm (84.0 in)
Motor transom height X:
637 mm (25.1 in)
Motor transom height U:
764 mm (30.1 in)
Dry weight (SUS) X:
356 kg (785 lb)
Dry weight (SUS) U:
364 kg (802 lb)
Performance:
Full throttle operating range:
5000–6000 r/min
Rated power:
257.4 kW (350 HP)
Idle speed (in neutral):
600–700 r/min
Power unit:
Type:
4-stroke DOHC V8 32 valves
Total displacement:
5330 cm3(325.2 c.i.)
Bore stroke:
94.0 96.0 mm (3.70 3.78 in)
Ignition system:
TCI
Spark plug (NGK):
LFR6A-11
Spark plug gap:
1.0–1.1 mm (0.039–0.043 in)
Steering system:
Remote steering
Starting system:
Electric starter
Starting carburetion system:
Fuel injection
Valve clearance IN (cold engine):
0.17–0.24 mm (0.0067–0.0094 in)
Valve clearance EX (cold engine):
0.31–0.38 mm (0.0122–0.0150 in)
Battery rating (CCA/SAE):
700–1150 A
Battery rating (MCA/ABYC):
900–1370 A
Battery rating (RC/SAE):
170 minutes
Battery rating (CCA/EN):
670–1080 A
Battery rating (20HR/IEC):
110 Ah
Maximum generator output:
50 A
Lower unit:
Gear shift positions:
Forward-neutral-reverse
Gear ratio:
1.73 (26/15)
Trim and tilt system:
Power trim and tilt
Propeller mark:
X (F350CC)
XL (LF350CC)
Fuel and oil:
Recommended fuel:
Mid-grade unleaded gasoline (For North America),
Premium unleaded gasoline
Min. pump octane number (PON):
89
Min. research octane number (RON):
94
Recommended engine oil:
YAMALUBE 4M FC-W or 4-stroke outboard motor
oil
Recommended engine oil grade 1:
SAE 10W-30/10W-40/5W-30
API SE/SF/SG/SH/SJ/SL
Engine oil quantity (without oil filter replacement):
6.3 L (6.66 US qt, 5.54 Imp.qt)
Engine oil quantity (with oil filter replacement):
6.5 L (6.87 US qt, 5.72 Imp.qt)
Lubrication system:
Wet sump
Recommended gear oil:
Yamalube Marine Gearcase Lube HD or Hypoid
gear oil
Recommended gear oil grade:
SAE 80W API GL-5 / SAE 90 API GL-5
Gear oil quantity:
1.310 L (1.385 US qt, 1.153 Imp.qt) (LF350CC)
1.520 L (1.607 US qt, 1.338 Imp.qt) (F350CC)
Tightening torque:
Spark plug:
28 Nm (2.86 kgf-m, 20.7 ft-lb)
Propeller nut:
54 Nm (5.51 kgf-m, 39.8 ft-lb)
Engine oil drain bolt:
27 Nm (2.75 kgf-m, 19.9 ft-lb)
Engine oil filter:
18 Nm (1.84 kgf-m, 13.3 ft-lb)
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Specifications and requirements
13
EMU33556
Installation requirements
EMU33565
Boat horsepower rating
EWM01561
Overpowering a boat can cause severe instability.
Before installing the outboard motor(s), confirm that the to-
tal horsepower of your outboard motor(s) does not exceed
the boats maximum horsepower rating. See the boat’s ca-
pacity plate or contact the manufacturer.
EMU33572
Mounting motor
EWM01571
Improper mounting of the outboard motor could re-
sult in hazardous conditions such as poor handling,
loss of control, or fire hazards.
Because the motor is very heavy, special equipment
and training is required to mount it safely.
Your dealer or other person experienced in proper rigging
should mount the motor using correct equipment and com-
plete rigging instructions. For further information, see page
40.
EMU34954
Digital electronic control requirements
The digital electronic control is equipped with a start-in-gear
protection device(s). This device prevents the engine from
starting unless it is in neutral.
EWM01581
If the engine starts in gear, the boat can move sud-
denly and unexpectedly, possibly causing a collision
or throwing passengers overboard.
If the engine ever starts in gear, the start-in-gear pro-
tection device is not working correctly and you
should discontinue using the outboard. Contact your
Yamaha dealer.
This digital electronic control unit is only available for the
outboard motor which you have purchased.
Prior to use of the digital electronic control unit, set it in order
to operate your outboard motor only. Otherwise, it will not
be possible to operate the outboard motor.
Perform setting of the outboard motor and the digital elec-
tronic control unit in the following cases.
If a used outboard motor is installed
If the digital electronic control unit is replaced
If the ECM (Electronic control module) of the used out-
board motor is replaced
If the ECM (Electronic control module) of the digital elec-
tronic control unit is replaced
Consult your Yamaha dealer for setting.
EMU25695
Battery requirements
EMU44723
Battery specifications
Standard lead-acid, AGM, gel-cell, and maintenance-free
batteries are permitted. Use a fully charged battery that
meets the following specifications. The battery is an impor-
tant component necessary to obtain sure engine starting
and to maintain engine performance.
The engine may not start if the battery voltage is too low.
For North America
It is necessary to meet only two of the three specifications
(CCA, MCA, and RC) in one of the following combinations:
CCA/SAE and RC
MCA/ABYC and RC
For Oceania
It is necessary to meet the following specifications.
ECM01063
Do not use a battery that does not meet the specified
capacity. If a battery that does not meet specifica-
tions is used, the electric system could perform poor-
ly or be overloaded, causing electric system damage.
Do not use a battery which exceeds the maximum
CCA rating. If the batteries are used in parallel circuit,
use new batteries of the same type and make sure
that the total battery rating never exceed the maxi-
mum CCA rating.
EMU36293
Mounting battery
Mount the battery holder securely in a dry, well-ventilated,
vibration-free location in the boat. WARNING! Do not put
flammable items, or loose heavy or metal objects in the
same compartment as the battery. Fire, explosion or
sparks could result. [EWM01821]
Battery cable
The battery cable size and length are critical. Consult your
Yamaha dealer about the battery cable size and length.
EMU36303
Multiple batteries
To connect multiple batteries, such as for multiple engine
configurations or for an accessory battery, consult your
Yamaha dealer about battery selection and correct wiring.
Battery isolator
Your outboard motor is capable of charging an accessory
battery separate from the starting battery using an optional
isolator lead. Contact your Yamaha dealer for installation of
an optional isolator lead with over-current protection.
Battery rating (CCA/SAE):
700–1150 A
Battery rating (MCA/ABYC):
900–1370 A
Battery rating (RC/SAE):
170 minutes
Battery rating (CCA/EN):
670–1080 A
Battery rating (20HR/IEC):
110 Ah
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Specifications and requirements
14
EMU41603
Propeller selection
Next to selecting an outboard motor, selecting the right pro-
peller is one of the most important purchasing decisions a
boater can make. The type, size, and design of your propel-
ler have a direct impact on acceleration, top speed, fuel
economy, and even engine life. Yamaha designs and man-
ufactures propellers for every Yamaha outboard motor and
every application.
Your Yamaha dealer can help you select the right propeller
for your boating needs. Select a propeller that will allow the
engine to reach the middle or upper half of the operating
range at full throttle with the maximum boatload. Generally,
select a larger pitch propeller for a smaller operating load
and a smaller pitch propeller for a heavier load. If you carry
loads that vary widely, select the propeller that lets the en-
gine run in the proper range for your maximum load but re-
member that you may need to reduce your throttle setting to
stay within the recommended engine speed range when
carrying lighter loads.
Yamaha recommends to use a propeller suitable for the
“Shift Dampener System (SDS)”. For further information,
consult your Yamaha dealer.
To check the propeller, see page 68.
EMU36313
Counter rotation models
Standard outboard motors rotate clockwise. Counter rota-
tion models rotate counterclockwise and are typically used
in multiple motor setups.
On counter rotation models, be sure to use a propeller in-
tended for counterclockwise rotation. These propellers are
identified with the letter “L” after the size indication on the
propeller. WARNING! Never use a standard propeller
with a counter rotation motor, or a counter rotation pro-
peller with a standard motor. Otherwise the boat could
go in the direction opposite of that expected (for exam-
ple, reverse instead of forward), which could lead to an
accident. [EWM01811]
For instructions on propeller removal and installation, see
page 68.
EMU35141
Start-in-gear protection
Yamaha outboard motors or Yamaha-approved digital elec-
tronic control units are equipped with start-in-gear protec-
tion device(s). This feature permits the engine to be started
only when it is in neutral. Always select neutral before start-
ing the engine.
EMU41953
Engine oil requirements
Select an oil grade according to the average temperatures
in the area where the outboard motor will be used.
If oil grades listed under Recommended engine oil grade 1
are not available, select an alternative oil grade listed under
Recommended engine oil grade 2.
Recommended engine oil grade 1
Recommended engine oil grade 2
EMU36361
Fuel requirements
EMU44791
Gasoline
Use a good quality gasoline that meets the minimum octane
requirement. If knocking or pinging occurs, use a different
brand of gasoline or premium unleaded fuel. Yamaha rec-
ommends that you use alcohol-free gasoline (see Gasoline
with Ethanol) whenever possible.
The use of a poor quality gasoline may result in starting and
running problems. If you encounter drivability problems,
which you suspect could be related to the fuel you are us-
1. Propeller pitch in inches
2. Type of propeller (propeller mark)
3. Propeller diameter in inches
ZMU05937
-
3
12
Recommended engine oil:
YAMALUBE 4M FC-W or 4-stroke out-
board motor oil
Recommended engine oil grade 1:
SAE 10W-30/10W-40/5W-30
API SE/SF/SG/SH/SJ/SL
Recommended engine oil grade 2:
SAE 15W-40/20W-40/20W-50
API SH/SJ/SL
Engine oil quantity (without oil filter
replacement):
6.3 L (6.66 US qt, 5.54 Imp.qt)
Engine oil quantity (with oil filter re-
placement):
6.5 L (6.87 US qt, 5.72 Imp.qt)
ZMU06854
122˚F
50˚C
104
40
86
30
68
SAE API
SE
SF
SG
SH
SJ
SL
20
50
10
32
0
14
-10
-4
-20
10W–30
10W–40
5W–30
ZMU06855
122˚F
50˚C
104
40
86
30
68
SAE API
SH
SJ
SL
20
50
10
32
0
14
-10
-4
-20
15W–40
20W–40
20W–50
6AW-9-3B-1E.book 14 ページ ２０１６年２月１５日 月曜日 午前１１時９分

Specifications and requirements
15
ing, Yamaha recommends that you switch to a recognized
high quality brand of gasoline, such as a gasoline that is ad-
vertised as Top Tier Detergent Gasoline. (North America
only) NOTICE: Failure to comply with these recommen-
dations may also result in unscheduled maintenance,
fuel system damage, and internal engine damage.
[ECM04480]
For North America
For Oceania
ECM01982
Do not use leaded gasoline. Leaded gasoline can se-
riously damage the engine.
Avoid getting water and contaminants in the fuel
tank. Contaminated fuel can cause poor performance
or engine damage. Use only fresh gasoline that has
been stored in clean containers.
Gasoline with Ethanol
Two types of gasoline are commonly available in the U.S.A.,
Canada, Australia and New Zealand for use in automobiles
and boats: conventional gasoline without Ethanol and gas-
oline with Ethanol, which is typically referred to as E10 gas-
oline. According to federal regulations, E10 gasoline may
contain up to 10% Ethanol.
A high quality gasoline without Ethanol is the preferred fuel
for your Yamaha outboard motor. However, if gasoline with
Ethanol is the only fuel available in your area, your Yamaha
outboard motor is calibrated to run properly on fresh E10
gasoline that meets the minimum octane requirement spec-
ified for this model.
ECM02402
Never use a gasoline for your outboard motor that con-
tains more than 10% Ethanol, such as E15 which con-
tains 15% Ethanol or E85 which contains 85% Ethanol,
or gasoline containing any amount of Methanol. These
fuels can cause starting and running problems, as well
as serious fuel system and internal engine damage.
Gasoline containing ethanol has several properties that
may cause boat fuel system problems.
Ethanol is a strong solvent (cleaning agent) that can clean
gum and varnish deposits from a boat’s fuel system, par-
ticularly in older boats, as well as tanks and pipes used in
gasoline distribution. These released deposits contami-
nate the fuel and can cause problems, such as clogged
fuel filters, carburetors, or fuel injectors, which could re-
sult in engine damage.
Ethanol may dissolve resins used in the construction of fi-
berglass fuel tanks. The dissolved resins contaminate the
fuel and can cause problems, such as clogged fuel filters,
carburetors, or fuel injectors, which could result in engine
damage.
Ethanol is hygroscopic (has a strong attraction to water).
Therefore, any water that inadvertently enters the fuel
system, including moisture that is absorbed from the air,
will mix with the ethanol in the gasoline. If the amount of
water is excessive, the ethanol and water mixture will
separate from the gasoline in a layer at the bottom of the
fuel tank. This ethanol and water mixture is very corrosive
to aluminum fuel tanks and fuel system components.
The usable life span of E10 gasoline may be shorter than
the normal length of off-season boat storage, causing
starting and running problems related to stale fuel.
For more information on using fuel containing ethanol, visit:
http://www.yamaha-motor.com
Gasoline Filtration
Yamaha outboard motors are equipped with internal fuel fil-
ters. However, excessive water or debris entering your en-
gine’s fuel system could prematurely clog the internal filters,
causing starting and running problems, fuel system dam-
age, and internal engine damage. Therefore, it is recom-
mended that an external 10-micron water-separating fuel
filter be installed on your boat and serviced frequently. Con-
sult your authorized Yamaha dealer for a 10-micron filter
that meets your engine’s requirements.
EMU41342
Gasoline Additives
Gasoline blends change to meet automobile emission reg-
ulations and economic conditions. Additives, added by gas-
oline distributors, necessary for proper automobile engine
operation and durability, may not be sufficient for typical
boat applications. Intake valve and combustion chamber
deposits may accumulate in boat engines more rapidly than
encountered in automotive use. In addition, gasoline used
for boating will typically age longer between refills than gas-
oline used in automobiles, resulting in stale and unusable
gasoline that may cause starting and running problems, fuel
system damage, and internal engine damage.
Yamaha recommends the use of two Yamalube gasoline
additives to reduce internal deposits and extend the storage
life of gasoline. Continuous use of Yamalube Ring Free
Fuel Additive Plus reduces harmful internal deposits. Yam-
alube Fuel Stabilizer & Conditioner Plus added to fresh gas-
oline will help protect the fuel system from varnishing while
helping to keep the gasoline’s octane level from decreasing
excessively during storage. Other additives may also be
available on the market that may have varying degrees of
effectiveness. Consult your Yamaha dealer concerning
what may work best for the locally available gasoline and
environmental conditions.
EMU41354
Anti-fouling paint
A clean hull is required to maintain your boat’s performance.
Boats moored in the water should be protected from marine
growth (barnacles, mussels, and marine plants). If ap-
Recommended fuel:
Mid-grade unleaded gasoline
Min. pump octane number (PON):
89
Recommended fuel:
Premium unleaded gasoline
Min. research octane number (RON):
94
6AW-9-3B-1E.book 15 ページ ２０１６年２月１５日 月曜日 午前１１時９分