Yamaha F2.5C User manual

Printed in Japan
April 2003-0.5 ×0.1 !
65W-28199-17
(F25AMH, F25AEH, F25AE, F25AET, FT25BET)
(E)
Printed on recycled paper
F25C
T25C
OWNER’S MANUAL
U.S.A.Edition
LIT-18626-05-46
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Thank you for choosing 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.
QThe Safety Alert Symbol means
ATTENTION! BECOME ALERT!
YOUR SAFETY IS INVOLVED!
w
Failure to follow WARNING instructions
could result in severe injury or death to
the machine operator, a bystander, or a
person inspecting or repairing the out-
board motor.
cC
A CAUTION indicates special precautions
that must be taken to avoid damage to
the outboard motor.
NOTE:
A NOTE 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 cur-
rent product information available at the
time of printing, there may be minor dis-
crepancies between your machine and this
manual. If there is any question concern-
ing this manual, please consult your
Yamaha dealer.
NOTE:
The F25MH, T25TR and their standard
accessories are used as a base for the
explanations and illustrations in this manual.
Therefore, some items may not apply to
every model.
EMU01449
TO THE OWNER
EMU01446
F25C, T25C
OWNER’S MANUAL
©2003 by Yamaha Motor Corporation, USA
1st Edition, April 2003
All rights reserved.
Any reprinting or unauthorized use
without the written permission of
Yamaha Motor Corporation, USA
is expressly prohibited.
Printed in Japan
P/N LIT-18626-05-46
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GENERAL INFORMATION
BASIC COMPONENTS
OPERATION
MAINTENANCE
TROUBLE RECOVERY
INDEX
READ THIS OWNER’S MANUAL CAREFULLY
BEFORE OPERATING YOUR OUTBOARD MOTOR.
1
2
3
4
5
6
EMU00003
CONTENTS
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2
3
4
5
6
EMU00004
Chapter 1
GENERAL
INFORMATION
IDENTIFICATION NUMBERS RECORD ..1-1
Outboard motor serial number...........1-1
Key number...........................................1-1
EMISSION CONTROL INFORMATION...1-2
SAFETY INFORMATION..........................1-4
IMPORTANT LABELS ..............................1-6
BASIC BOATING RULES .........................1-7
FUELING INSTRUCTIONS.....................1-11
Gasoline (Petrol).................................1-12
ENGINE OIL ............................................1-13
BATTERY REQUIREMENT ....................1-14
PROPELLER SELECTION .......................1-15
START-IN-GEAR PROTECTION ............1-16
1
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1-1
EMU00005
IDENTIFICATION NUMBERS
RECORD
EMU00007
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 num-
ber in the spaces provided to assist you in
ordering spare parts from your Yamaha
dealer or for reference in case your out-
board motor is stolen.
1Outboard motor serial number
EMU00008
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.
1Key number
401013
q
904011*
123
YAMAHA
q
YAMAHA MOTOR CO., LTD.
MADE IN JAPAN
PAYS D'ORIGINE JAPON
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1-2
q
w
EMU01385
EMISSION CONTROL
INFORMATION
EMU01387
NORTH AMERICAN MODELS
This engine conforms to U.S. Environ-
mental Protection Agency (EPA) regula-
tions for marine SI engines. See the label
affixed to your engine for details.
Approval label of Emission control
certificate
This label is attached to the bottom cowl-
ing.
1Emission control information label
New Technology ; (4-stroke) EM
Manufactured date label
This label is attached to the clamp brack-
et.
2Manufactured date label
EMISSION CONTROL INFORMATION
ENGINE FAMILY :
THIS ENGINE CONFORMS TO 2001 U.S. EPA REGULATIONS FOR MARINE SI ENGINES.
THIS ENGINE CONFORMS TO 2001 CALIFORNIA EMISSION REGULATIONS FOR SI MARINE ENGINES.
REFER TO THE OWNERS MANUAL FOR MAINTENANCE SPECIFICATIONS AND ADJUSTMENTS.
FELs :
SPARK PLUG :
DISPLACEMENT :
ADVERTISED POWER :
IDLE SPEED :
SPARK PLUG GAP (mm) :
FUEL : GASOLINE
VALVE LASH (mm) : IN EX
cm
kw
g/kw-hr rpm IN NEUTRAL
3
EM
Manufactured:
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1-3
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EMU01389
STAR LABELS
Your outboard motor is labeled with a
California Air Resources Board (CARB)
star label. See below for a description of
your particular label.
1Star label
One Star - Low Emission
The one-star label identifies engines that
meet the Air Resources Board’s 2001
exhaust emission standards. Engines
meeting these standards have 75% lower
emissions than conventional carbureted
two-stroke engines. These engines are
equivalent to the U.S. EPA’s 2006 stan-
dards for marine engines.
Two Stars - Very Low Emission
The two-star label identifies engines that
meet the Air Resources Board’s 2004
exhaust emission standards. Engines
meeting these standards have 20% lower
emissions than One Star-Low-Emission
engines.
Three Stars - Ultra Low Emission
The three-star label identifies engines that
meet the Air Resources Board’s 2008
exhaust emission standards. Engines
meeting these standards have 65% lower
emissions than One Star-Low-Emission
engines.
q
000853
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1-4
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8This product emits exhaust gases which
contain carbon monoxide, a colorless,
odorless gas which may cause brain
damage or death when inhaled. Symp-
toms include nausea, dizziness, and
drowsiness. Keep cockpit and cabin
areas well ventilated. Avoid blocking
exhaust outlets.
8Check throttle, shift, and steering for
proper operation before starting the
engine.
8Attach the engine stop switch lanyard
to a secure place on your clothing, or
your arm or leg while operating. If you
accidentally leave the helm, the lanyard
will pull from the switch, stopping the
engine.
8Know the marine laws and regulations
where you will be boating - and obey
them. Refer to the “RULES OF THE
ROAD” section for basic boating rules.
8Stay informed about the weather.
Check weather forecasts before boating.
Avoid boating in hazardous weather.
8Tell someone where you are going:
leave a Float Plan with a responsible
person. Be sure to cancel the Float Plan
when you return.
8Use common sense and good judgment
when boating. Know your abilities, and
be sure you understand how your boat
handles under the different boating
conditions you may encounter. Operate
within your limits, and the limits of your
boat. Always operate at safe speeds,
and keep a careful watch for obstacles
and other traffic.
8Always watch carefully for swimmers
during the engine operation.
8Stay away from swimming areas.
8When a swimmer is in the water near
you shift into neutral and shut off the
engine.
EMU00917
SAFETY
INFORMATION
8Before mounting or operating the out-
board motor, read this entire manual.
Reading it should give you an under-
standing of the motor and its operation.
8Before operating the boat, read any
owner’s or operator’s manuals supplied
with it and all labels. Be sure you under-
stand each item before operating.
8Do not overpower the boat with this
outboard motor. Overpowering the
boat could result in loss of control. The
rated power of the outboard should be
equal to or less than the rated horse-
power capacity of the boat. If the rated
horsepower capacity of the boat is
unknown, consult the dealer or boat
manufacturer.
8Do not modify the outboard. Modifica-
tions could make the motor unfit or
unsafe to use.
8Never operate after drinking alcohol or
taking drugs. About 50% of all boating
fatalities involve intoxication.
8Have an approved personal flotation
device (PFD) on board for every occu-
pant. It is a good idea to wear a PFD
whenever boating. At a minimum, chil-
dren and non-swimmers should always
wear PFDs, and everyone should wear
PFDs when there are potentially haz-
ardous boating conditions.
8Gasoline is highly flammable, and its
vapors are flammable and explosive.
Handle and store gasoline carefully.
Make sure there are no gas fumes or
leaking fuel before starting the engine.
Q
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1-5
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8Be informed about boating safety. Addi-
tional publications and information can
be obtained from many organizations,
including the following:
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
Boating Safety Hotline: [phone]
National Marine Manufacturers
Association (NMMA)
401 N. Michigan Ave.
Chicago, Il 60611
Marine Retailers Association of America
155 N. Michigan Ave.
Chicago, Il 60601
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1-6
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EMU00014
IMPORTANT LABELS
WARNING LABELS
1
2
CAUTION LABELS
3
202054*
w
e
q
WARNING
This engine is equipped with a neutral starting device.
The engine will not start unless the shift control is
in neutral position. 6E0-83627-41
WARNING
7Be sure shift control is in neutral
before starting engine. (except 2HP)
7Do not touch or remove electrical parts
when starting or during operation.
7Keep hands,hair,and clothes away from flywheel
and other rotating parts while engine is running.
6A1-83625-41
6G8-13444-41
CAUTION
Transport and store the engine only as shown.
Otherwise, engine damage could result from
leaking oil.
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1-7
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EMU00015
BASIC BOATING RULES
(Rules of the road)
Just as there are rules which apply when
you are driving on streets and high ways,
there are waterway rules which apply
when you are driving your boat. These
rules are used internationally, 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 encounter another vessel
on the water.
Several sets of rules prevail according to
geographic location, but are all basically
the same as the International Rules of the
Road. The rules presented here in your
Owner’s Manual are condensed, and have
been provided for your convenience only.
Consult your local U.S. Coast Guard Aux-
iliary or Department of Motor Vehicles for
a complete set of rules governing the
waters in which you will be using your
boat.
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” vessel.
The vessel which does not have the right-
of-way is called the “give-way” or “bur-
dened” 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 vessel will be able to
determine how best to avoid you.
Give-way vessel
The vessel which 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 Interna-
tional Rules and says,
‘In obeying and construing these rules
due regard shall be had to all dangers of
navigation and collision, and to any spe-
cial circumstances, which may render a
departure from the above rules necessary
in order to avoid immediate danger.’
In other words, follow the standard rules
except when a collision will occur unless
both vessels try to avoid each other. If
that is the case, both vessels become
“Give-Way” vessels.
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1-8
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RULES WHEN ENCOUNTERING
VESSELS
There are three main situations which you
may encounter with other vessels which
could lead to a collision unless the Steer-
ing 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 ves-
sels in the shaded area must yield to you
(they are the Give-Way vessels). Both you
and the meeting vessel must alter course
to avoid each other.
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 ves-
sel is on your port (left) side, remember
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
102045
102044
102046
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1-9
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its course and speed. You must stay out
of its way until you are clear of it. Like-
wise, if another vessel is passing you, you
should maintain your speed and direction
so that the other vessel can steer itself
around you.
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 operator
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 navi-
gate such waters with your boat, you will
need to carry a portable air horn, avail-
able from local marine supply stores.
Fishing vessel right-of-way
All vessels which are fishing with nets,
lines or trawls are considered to be “fish-
ing vessels” under the International
Rules. Vessels with trolling lines are not
considered fishing vessels. Fishing ves-
sels have the right-of-way regardless of
position. Fishing vessels cannot, howev-
er, impede the passage 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 which can
navigate only in such a channel.
Reading buoys and other markers
The waters of the United states are
marked for safe navigation 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 par-
ticular direction. The markings on these
buoys are oriented from the perspective
of being entered from seaward (the
boater is going towards the port). This
means that red buoys are passed on the
starboard (right) side when proceeding
from open water into port, and black
buoys are to port (left) side. When navi-
gating 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 partic-
ular state. The Uniform State Waterway
Marking System has been devised for
these waters. This system uses buoys and
signs with distinctive shapes and colors
to show regulatory or advisory informa-
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1-10
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11
A
11
Proceeding toward head
of navigation from seaward
CAN BUOY
Odd number. Leave to port.
OR
SECONDARY CHANNEL BUOYS
STARTS NEW NUMBERING SYSTEM
old new
C " 1 "
NUN BUOY
Even number. Leave to starboard
N " 2 "
No change
BUOY
COLOR CODE
BLACK
RED
GREEN
" A "
"
2 "
"
1 "
"
3 "
"
4 "
"
5 "
"
7 "
N " 2 "
"
6 "
C " 1 "
RB " L "
RG " L "
or
SECONDARY CHANNEL
MAIN CHANNEL
old new
2
22
A
L
L
Odd number. increasing toward head of naviga-
MAIN CHANNEL BUOYS
" 1 " " 3 " " 5 " " 7 "
tion.Leave to port (left) proceeding upstream.
LIGHTED BUOY (Port Hand)`
White Light Green Light
old new
old new
old new
LIGHTED BUOY (Starboard Hand)`
" 2 " " 4 " " 6 "
Even number,increasing toward head of naviga-
tion. Leave to starboard (right) proceeding up-
stream.
White Light Red Light
" A "
LIGHTED SAFE WATER BUOY
No number. Marks midchannel, pass on either
side. Letter has no lateral significance, used for
No number. Topmost band red
- preferred
Top Mark
White Light
White Light
OR
OR
LIGHTED PREFERRED CHANNEL TO
RB
" L " RG " L "
PORT BUOY
identification and location purposes.
channel is to left of buoy. Letter has no lateral
significance, used for identification and location
purposes.
Red Light
Red or
White Light
OR
102052
tion. These markers are white with black
letters and orange boarders. They signify
speed zones, restricted areas, danger
areas, and general information.
Remember, markings may vary by geo-
graphic location. Always consult local
boating authorities before driving your
boat in unfamiliar waters.
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EMU00016
FUELING INSTRUCTIONS
w
GASOLINE AND ITS VAPORS ARE HIGH-
LY FLAMMABLE AND EXPLOSIVE!
8Do not smoke when refueling, and
keep away from sparks, flames, or
other sources of ignition.
8Stop engine before refueling.
8Refuel in a well-ventilated area. Refuel
portable fuel tanks off the boat.
8Take care not to spill gasoline. If gaso-
line spills, wipe it up immediately with
dry rags.
8Do not overfill the fuel tank.
8Tighten the filler cap securely after
refueling.
8If you should swallow some gasoline
inhale a lot of gasoline vapor, or get
gasoline in your eyes, get immediate
medical attention.
8If any gasoline spills onto your skin,
immediately wash with soap and
water. Change clothing if gasoline spills
on it.
8Touch the fuel nozzle to the filler open-
ing or funnel to help prevent electrosta-
tic sparks.
cC
Use only new clean gasoline which has
been stored in clean containers and is not
contaminated with water or foreign mat-
ter.
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1-12
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EMU01804
GASOLINE
If knocking or pinging occurs, use a differ-
ent brand of gasoline or premium unlead-
ed fuel.
Recommended gasoline:
Regular unleaded gasoline with a
minimum octane rating of 86
(Pump Octane Number) = (R+M)/2
EMU00027
Gasohol
There are two types of gasohol: gasohol
containing ethanol and that containing
methanol. Gasohol containing ethanol
can be used if ethanol content does not
exceed 10% and the fuel meets minimum
octane ratings. Gasohol containing
methanol is not recommended by Yama-
ha because it can cause fuel system dam-
age or engine performance problems.
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EMU01769
ENGINE OIL
Recommended engine oil:
4-stroke motor oil with a combination of
corresponding SAE and API as shown in
the chart.
cC
All 4-stroke engines are shipped from the
factory without engine oil.
Engine oil quantity:
See Chapter 4, “Specifications.”
001162
SAE API
SE
SF
SG
SH
SJ
10W-30
10W-40
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EMU01775
BATTERY REQUIREMENT
cC
Do not use a battery that does not meet
the specified capacity. If a battery which
does not meet specifications is used, the
electric system could perform poorly or
be overloaded, causing electric system
damage.
For electric start models, choose a battery
which meets the following specifications.
EMU01859
Minimum cold cranking amps
(CCA/SAE):
245 amps at -18°C (-0.4°F)
Minimum marine cranking amps
(MCA/ABYC):
323 amps at 0°C (32°F)
Minimum reserve capacity (RC/SAE):
52 minutes
EMU01783¯
cC
A battery cannot be connected to models
that do not have a rectifier or Rectifier
Regulator.
Models without a rectifier or Rectifier
Regulator: F25MH
8If you wish to use a battery with the
above models, install an optional Recti-
fier Regulator.
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EMU01395
PROPELLER SELECTION
The performance of your outboard motor
will be critically affected by your choice of
propeller, as an incorrect choice could
adversely affect performance and could
also seriously damage the motor. Engine
speed depends on the propeller size and
boat load. If engine speed is too high or
too low for good engine performance,
this will have an adverse effect on the
engine.
Yamaha outboard motors are fitted with
propellers chosen to perform well over a
range of applications, but there may be
uses where a propeller with a different
pitch would be more appropriate. For a
greater operating load, a smaller-pitch
propeller is more suitable as it enables
the correct engine speed to be main-
tained. Conversely, a larger-pitch pro-
peller is more suitable for a smaller oper-
ating load.
Yamaha dealers stock a range of pro-
pellers, and can advise you and install a
propeller on your outboard that is best
suited to your application.
NOTE:
At full throttle and under a maximum
boat load, the engine’s rpm should be
within the upper half of the full throttle
operating range, as listed in “SPECIFICA-
TIONS” on page 4-1. Select a propeller
which fulfills this requirement.
If operating under conditions which allow
the engine’s rpm to rise above the maxi-
mum recommended range (such as light
boat loads), reduce the throttle setting to
maintain the rpm in the proper operating
range.
602016
10-3/4x17-F
123
000601
12-1/4 x 9 - G
weq
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