Yamaha F25A User manual

Read this manual carefully before operating this
outboard motor.
OWNER’S MANUAL
F2.5A
69M-F8199-78-E0
U69M78E0.book Page 1 Monday, April 26, 2010 11:53 AM

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.
U69M78E0.book Page 1 Monday, April 26, 2010 11:53 AM

Important manual information
EMU25107
To the owner
Thank you for selecting a Yamaha outboard
motor. This Owner’s Manual contains infor-
mation needed for proper operation, mainte-
nance 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 haz-
ards. Obey all safety messages that follow
this symbol to avoid possible injury or death.
WARNING
EWM00781
A WARNING indicates a hazardous situa-
tion which, if not avoided, could result in
death or serious injury.
NOTICE
ECM00701
A NOTICE indicates special precautions
that must be taken to avoid damage to the
outboard motor or other property.
T
IP:
A TIP provides key information to make pro-
cedures 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 con-
sult your Yamaha dealer.
To ensure long product life, Yamaha recom-
mends that you use the product and perform
the specified periodic inspections and mainte-
nance by correctly following the instructions in
the owner’s manual. Any damage resulting
from neglect of these instructions is not cov-
ered by warranty.
Some countries have laws or regulations re-
stricting users from taking the product out of
the country where it was purchased, and it
may be impossible to register the product in
the destination country. Additionally, the war-
ranty may not apply in certain regions. When
planning to take the product to another coun-
try, consult the dealer where the product was
purchased for further information.
If the product was purchased used, please
consult your closest dealer for customer re-
registration, and to be eligible for the specified
services.
T
IP:
The F2.5AMH 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 model.
EMU25141
F2.5A
OWNER’S MANUAL
©2010 by Yamaha Motor Co., Ltd.
1st Edition, March 2010
All rights reserved.
Any reprinting or unauthorized use
without the written permission of
Yamaha Motor Co., Ltd.
is expressly prohibited.
Printed in France
U69M78E0.book Page 1 Monday, April 26, 2010 11:53 AM

Table of contents
Safety information............................. 1
Outboard motor safety .................... 1
Propeller ............................................. 1
Rotating parts ..................................... 1
Hot parts............................................. 1
Electric shock ..................................... 1
Engine shut-off cord (lanyard) ............ 1
Gasoline ............................................. 1
Gasoline exposure and spills ............. 1
Carbon monoxide ............................... 1
Modifications ...................................... 2
Boating safety ................................. 2
Alcohol and drugs............................... 2
Personal flotation devices .................. 2
People in the water............................. 2
Passengers ........................................ 2
Overloading ........................................ 2
Avoid collisions................................... 2
Weather.............................................. 3
Passenger training ............................. 3
Boating safety publications................. 3
Laws and regulations ......................... 3
General information .......................... 4
Identification numbers record.......... 4
Outboard motor serial number ........... 4
EC Declaration of Conformity
(DoC)............................................ 4
CE Marking ..................................... 4
Read manuals and labels................ 5
Warning labels.................................... 5
Specifications and requirements..... 8
Specifications .................................. 8
Installation requirements ................. 9
Boat horsepower rating ...................... 9
Mounting motor .................................. 9
Propeller selection........................... 9
Engine oil requirements ................ 10
Fuel requirements ......................... 10
Gasoline ........................................... 10
Muddy or acidic water ................... 10
Anti-fouling paint ........................... 11
Motor disposal requirements......... 11
Emergency equipment .................. 11
Emission control information......... 11
SAV models...................................... 11
Components .................................... 13
Components diagram.................... 13
Fuel tank........................................... 13
Fuel tank cap.................................... 14
Air vent screw................................... 14
Fuel cock .......................................... 14
Tiller handle ...................................... 14
Gear shift lever ................................. 15
Throttle grip ...................................... 15
Throttle indicator............................... 15
Throttle friction adjuster .................... 15
Engine shut-off cord (lanyard) and
clip................................................. 16
Engine stop button ........................... 16
Choke knob for pull type................... 16
Manual starter handle....................... 16
Steering friction adjuster................... 17
Trim rod (tilt pin) ............................... 17
Tilt support lever for manual tilt
model ............................................ 17
Cowling lock lever (pull up type)....... 17
Carrying handle ................................ 18
Installation ....................................... 19
Installation..................................... 19
Mounting the outboard motor ........... 19
Clamping the outboard motor........... 20
Operation ......................................... 22
First-time operation ....................... 22
Fill engine oil .................................... 22
Breaking in engine............................ 22
Getting to know your boat ................ 22
Checks before starting engine ...... 22
Fuel level .......................................... 22
Remove cowling ............................... 23
Fuel system ...................................... 23
Controls ............................................ 23
Engine shut-off cord (lanyard) .......... 23
Engine oil.......................................... 23
U69M78E0.book Page 1 Monday, April 26, 2010 11:53 AM

Table of contents
Engine .............................................. 24
Install cowling ................................... 24
Filling fuel for built-in tank ............. 24
Operating engine........................... 25
Sending fuel ..................................... 25
Starting engine ................................. 26
Checks after starting engine ......... 27
Cooling water ................................... 27
Warming up engine ....................... 28
Warming up
(Manual start models) ................... 28
Checks after engine warm up ....... 28
Shifting ............................................. 28
Stop switches ................................... 28
Shifting .......................................... 28
Stopping engine ............................ 29
Procedure......................................... 29
Trimming outboard motor.............. 30
Adjusting trim angle for manual tilt
models .......................................... 30
Adjusting boat trim............................ 31
Tilting up and down ....................... 32
Procedure for tilting up
(manual tilt models)....................... 32
Procedure for tilting down
(manual tilt models)....................... 33
Cruising in other conditions........... 34
Maintenance..................................... 35
Transporting and storing outboard
motor .......................................... 35
Clamp screw mounting models ........ 35
Storing outboard motor..................... 36
Procedure......................................... 36
Lubrication........................................ 38
Cleaning the outboard motor............ 38
Checking painted surface of
outboard motor.............................. 38
Periodic maintenance.................... 38
Replacement parts ........................... 38
Severe operating conditions............. 39
Maintenance chart 1......................... 40
Maintenance chart 2......................... 42
Greasing........................................... 42
Cleaning and adjusting spark plug ... 43
Inspecting idle speed........................ 43
Changing engine oil.......................... 44
Inspecting wiring and connectors ..... 45
Checking propeller ........................... 45
Removing propeller .......................... 46
Installing propeller ............................ 46
Changing gear oil ............................. 47
Inspecting and replacing anode(s) ... 48
Trouble Recovery............................ 49
Troubleshooting ............................ 49
Temporary action in emergency ... 52
Impact damage................................. 52
Starter will not operate ..................... 52
Emergency Starting Engine.............. 53
Treatment of submerged motor .... 55
U69M78E0.book Page 2 Monday, April 26, 2010 11:53 AM

1
Safety information
EMU33622
Outboard motor safety
Observe these precautions at all times.
EMU36501
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 neu-
tral, and sharp edges of the propeller can cut
even when stationary.
●Stop the engine when a person is in the wa-
ter near you.
●Keep people out of reach of the propeller,
even when the engine is off.
EMU33630
Rotating parts
Hands, feet, hair, jewelry, clothing, PFD
straps, etc. can become entangled with inter-
nal rotating parts of the engine, resulting in se-
rious injury or death.
Keep the top cowling in place whenever pos-
sible. Do not remove or replace the cowling
with the engine running.
Only operate the engine with the cowling re-
moved according to the specific instructions in
the manual. Keep hands, feet, hair, jewelry,
clothing, PFD straps, etc. away from any ex-
posed moving parts.
EMU33640
Hot parts
During and after operation, engine parts are
hot enough to cause burns. Avoid touching
any parts under the top cowling until the en-
gine has cooled.
EMU33650
Electric shock
Do not touch any electrical parts while starting
or operating the engine. They can cause
shock or electrocution.
EMU33671
Engine shut-off cord (lanyard)
Attach the engine shut-off cord so that the en-
gine stops if the operator falls overboard or
leaves the helm. This prevents the boat from
running away under power and leaving peo-
ple stranded, or running over people or ob-
jects.
Always attach the engine shut-off cord to a
secure place on your clothing or your arm or
leg while operating. Do not remove it to leave
the helm while the boat is moving. Do not at-
tach the cord to clothing that could tear loose,
or route the cord where it could become en-
tangled, 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 ob-
jects forward.
EMU33810
Gasoline
Gasoline and its vapors are highly flam-
mable and explosive. Always, refuel accord-
ing to the procedure on page 25 to reduce the
risk of fire and explosion.
EMU33820
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, immedi-
ately wash with soap and water. Change
clothing if gasoline spills on it.
If you swallow gasoline, inhale a lot of gaso-
line vapor, or get gasoline in your eyes, get
immediate medical attention. Never siphon
fuel by mouth.
EMU33900
Carbon monoxide
This product emits exhaust gases which con-
tain 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 ex-
haust outlets.
U69M78E0.book Page 1 Monday, April 26, 2010 11:53 AM

Safety information
2
EMU33780
Modifications
Do not attempt to modify this outboard motor.
Modifications to your outboard motor may re-
duce safety and reliability, and render the out-
board unsafe or illegal to use.
EMU33740
Boating safety
This section includes a few of the many im-
portant safety precautions that you should fol-
low when boating.
EMU33710
Alcohol and drugs
Never operate after drinking alcohol or taking
drugs. Intoxication is one of the most common
factors contributing to boating fatalities.
EMU33720
Personal flotation devices
Have an approved personal flotation device
(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 condi-
tions.
EMU33731
People in the water
Always watch carefully for people in the wa-
ter, such as swimmers, skiers, or divers,
whenever the engine is running. When some-
one 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.
EMU33751
Passengers
Consult your boat manufacturer’s instructions
for details about appropriate passenger loca-
tions in your boat and be sure all passengers
are positioned properly before accelerating
and when operating above an idle speed.
Standing or sitting in non-designated loca-
tions may result in being thrown either over-
board 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.
EMU33760
Overloading
Do not overload the boat. Consult the boat ca-
pacity plate or boat manufacturer for maxi-
mum weight and number of passengers. Be
sure that weight is properly distributed ac-
cording to the boat manufacturers instruc-
tions. Overloading or incorrect weight
distribution can compromise the boats han-
dling and lead to an accident, capsizing or
swamping.
EMU33772
Avoid collisions
Scan constantly for people, objects, and other
boats. Be alert for conditions that limit your
visibility or block your vision of others.
Operate defensively at safe speeds and keep
a safe distance away from people, objects,
and other boats.
●Do not follow directly behind other boats or
waterskiers.
ZMU06025
U69M78E0.book Page 2 Monday, April 26, 2010 11:53 AM

Safety information
3
●Avoid sharp turns or other maneuvers that
make it hard for others to avoid you or un-
derstand where you are going.
●Avoid areas with submerged objects or
shallow water.
●Ride within your limits and avoid aggressive
maneuvers to reduce the risk of loss of con-
trol, ejection, and collision.
●Take early action to avoid collisions. Re-
member, 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 anoth-
er direction.
EMU33790
Weather
Stay informed about the weather. Check
weather forecasts before boating. Avoid boat-
ing in hazardous weather.
EMU33880
Passenger training
Make sure at least one other passenger is
trained to operate the boat in the event of an
emergency.
EMU33890
Boating safety publications
Be informed about boating safety. Additional
publications and information can be obtained
from many boating organizations.
EMU33600
Laws and regulations
Know the marine laws and regulations where
you will be boating- and obey them. Several
sets of rules prevail according to geographic
location, but all are basically the same as the
International Rules of the Road.
U69M78E0.book Page 3 Monday, April 26, 2010 11:53 AM

General information
4
EMU25171
Identification numbers record
EMU25183
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 sto-
len.
EMU37290
EC Declaration of Conformity
(DoC)
This outboard motor conforms to certain por-
tions of the European Parliament directive re-
lating to machinery.
Each conformed outboard motor accompa-
nied with EC DoC.EC DoC contains the fol-
lowing information;
●Name of Engine Manufacture
●Model name
●Product code of model (Approved model
code)
●Code of conformed directives
EMU25203
CE Marking
Outboard motors affixed with this “CE”mark-
ing conform with the directives of; 98/37/EC,
94/25/EC - 2003/44/EC and 2004/108/EC.
1. Outboard motor serial number location
1. CE marking location
ZMU06304
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General information
5
EMU33522
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.
EMU33832
Warning labels
If these labels are damaged or missing, contact your Yamaha dealer for replacements.
F2.5A
U69M78E0.book Page 5 Monday, April 26, 2010 11:53 AM