Yamaha F25, T25 user guide
OWNER’S MANUAL
F25
T25
q Read this manual carefully before operating this
outboard motor.
U.S.A.Edition
LIT-18626-08-49
6BP-28199-11
EMU25062
ZMU01690
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.
Important manual information
T
T
EMU31283
To the owner
Thank you for choosing a Yamaha outboard
motor. This Owner’s Manual contains information needed for proper operation, 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 messages that follow this symbol to avoid possible injury or
death.
EWM00781
WARNING
A WARNING indicates a hazardous situation which, if not avoided, could result in
death or serious injury.
ECM00701
NOTICE
A NOTICE indicates special precautions
that must be taken to avoid damage to the
outboard motor or other property.
there is any question concerning this manual, please consult your Yamaha dealer.
IP:
The F25A, F25EA, F25EHA, F25MHA, T25A
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.
EMU25111
F25, T25
OWNER’S MANUAL
©2009 by Yamaha Motor Corporation, USA
1st edition, February 2009
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-18626-08-49
IP:
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
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 ............ 2
Carbon monoxide.............................. 2
Modifications ..................................... 2
Boating safety ................................. 2
Alcohol and drugs .............................2
Personal flotation devices ................. 2
People in the water ...........................2
Passengers ....................................... 2
Overloading....................................... 2
Avoid collisions ................................. 3
Weather ............................................ 3
Accident reporting ............................. 3
Boat education and training ..............3
Passenger training ............................ 4
Boating safety publications ...............4
Laws and regulations ........................ 4
Boating organizations...................... 4
Basic boating rules
(Rules of the road) ........................4
Steering and sailing rules and
sound signals.................................. 5
Rules when encountering vessels .... 5
Other special situations..................... 6
General information .......................... 9
Identification numbers record.......... 9
Outboard motor serial number .......... 9
Key number....................................... 9
Read manuals and labels.............. 10
Warning labels ................................10
Specifications and requirements... 14
Specifications ................................ 14
Installation requirements ............... 16
Boat horsepower rating................... 16
Mounting motor ............................... 16
Remote control requirements........ 16
Battery requirements..................... 16
Specifications of Battery.................. 16
Mounting battery .............................17
Multiple batteries ............................. 17
Without a rectifier or Rectifier
Regulator ......................................17
Propeller selection ........................ 17
Start-in-gear protection ................. 18
Engine oil requirements ................ 18
Fuel requirements......................... 18
Gasoline .......................................... 18
Ring Free Fuel Additive................... 19
Muddy or acidic water................... 19
Anti-fouling paint ........................... 19
Motor disposal requirements......... 20
Emergency equipment.................. 20
Emission control information......... 20
North American models................... 20
Star labels .......................................21
Components .................................... 23
Components diagram.................... 23
Fuel tank .........................................24
Fuel joint.......................................... 25
Fuel gauge ......................................25
Fuel tank cap................................... 25
Air vent screw.................................. 25
Remote control box ......................... 25
Remote control lever ....................... 25
Neutral interlock trigger ................... 26
Neutral throttle lever........................ 26
Tiller handle..................................... 26
Gear shift lever................................ 26
Throttle grip ..................................... 27
Throttle indicator .............................27
Throttle friction adjuster................... 28
Engine shut-off cord (lanyard)
and clip.......................................... 28
Engine stop button ..........................29
Manual starter handle .....................29
Starter button ..................................30
Main switch .....................................30
Steering friction adjuster .................30
Power trim and tilt switch on
remote control or tiller handle .......31
Power trim and tilt switch on
bottom engine cowling .................. 31
Table of contents
Trim tab with anode ........................ 32
Trim tab........................................... 32
Trim rod (tilt pin).............................. 33
Tilt lock mechanism......................... 33
Tilt support knob ............................. 33
Tilt support bar ................................ 34
Cowling lock lever(s) (turn type)...... 34
Flushing device ............................... 34
Alert indicator .................................. 34
Instruments and indicators ............ 36
Indicators....................................... 36
Low oil pressure-alert indicator ....... 36
Overheat-alert indicator .................. 36
Engine control system.................... 37
Alert system .................................. 37
Overheat alert .................................37
Low oil pressure alert...................... 37
Installation .......................................39
Installation ..................................... 39
Mounting the outboard motor.......... 39
Clamping the outboard motor ......... 40
Operation .........................................42
First-time operation ....................... 42
Fill engine oil ................................... 42
Breaking in engine ..........................42
Getting to know your boat ............... 42
Checks before starting engine ...... 42
Fuel level......................................... 42
Remove cowling.............................. 43
Fuel system..................................... 43
Controls........................................... 43
Engine shut-off cord (lanyard)......... 44
Engine oil ........................................45
Engine............................................. 45
Flushing device ............................... 45
Install cowling.................................. 45
Checking power trim and tilt
system .......................................... 46
Battery............................................. 46
Filling fuel ...................................... 46
Operating engine........................... 47
Sending fuel (portable tank)............ 47
Starting engine................................ 49
Checks after starting engine ......... 55
Cooling water ..................................55
Warming up engine....................... 55
Manual start and electric start
models ..........................................55
Checks after engine warm-up....... 55
Shifting ............................................55
Stop switches .................................. 56
Shifting.......................................... 56
Stopping boat................................ 58
Stopping engine............................ 58
Procedure........................................ 58
Trimming outboard motor.............. 59
Adjusting trim angle for manual tilt
models ..........................................59
Adjusting trim angle
(Power trim and tilt)....................... 60
Adjusting boat trim ..........................61
Tilting up and down....................... 62
Procedure for tilting up
(manual tilt models)....................... 62
Procedure for tilting up
(power trim and tilt models)........... 63
Procedure for tilting down
(manual tilt models)....................... 65
Procedure for tilting down
(power trim and tilt models)........... 65
Shallow water................................ 66
Cruising in shallow water
(manual tilt models)....................... 66
Power trim and tilt models............... 67
Cruising in other conditions........... 68
Maintenance .................................... 69
Transporting and storing outboard
motor ........................................... 69
Clamp screw mounting models ....... 69
Storing outboard motor ...................69
Procedure........................................ 70
Lubrication....................................... 71
Cleaning and anticorrosion
measures ...................................... 71
Flushing power unit ......................... 71
Cleaning the outboard motor........... 72
Checking painted surface of
motor............................................. 72
Periodic maintenance ................... 72
Table of contents
Replacement parts.......................... 73
Maintenance interval guidelines...... 73
Maintenance chart 1 ....................... 74
Maintenance chart 2 ....................... 76
Greasing ......................................... 77
Cleaning and adjusting spark
plug ............................................... 78
Checking fuel filter .......................... 79
Inspecting idling speed ................... 79
Changing engine oil ........................80
Checking wiring and connectors ..... 82
Checking propeller .......................... 82
Removing propeller......................... 82
Installing propeller........................... 83
Changing gear oil............................ 84
Cleaning fuel tank ...........................85
Inspecting and replacing
anode(s)........................................ 86
Checking battery
(for electric start models) ..............86
Connecting the battery.................... 87
Disconnecting the battery ............... 87
Trouble Recovery............................ 89
Troubleshooting ............................ 89
Temporary action in emergency.... 92
Impact damage ...............................92
Replacing fuse ................................92
Power trim and tilt will not
operate.......................................... 93
Starter will not operate .................... 93
Emergency starting engine
(manual start model)..................... 94
Emergency starting engine
(electric start model) .....................96
Treatment of submerged motor..... 97
Consumer information.................... 98
YAMAHA MOTOR
CORPORATION, U.S.A.
FOUR-STROKE OUTBOARD
MOTOR
THREE-YEAR LIMITED
WARRANTY ................................ 98
IMPORTANT WARRANTY
INFORMATION IF YOU USE
YOUR YAMAHA OUTSIDE
THE USA OR CANADA............ 100
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
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.
EMU33630
Rotating parts
Hands, feet, hair, jewelry, clothing, PFD
straps, etc. can become entangled with internal rotating parts of the engine, resulting in
serious injury or death.
Keep the top cowling in place whenever possible. Do not remove or replace the cowling
with the engine running.
Only operate the engine with the cowling removed according to the specific instructions
in the manual. Keep hands, feet, hair, jewelry, clothing, PFD straps, etc. away from any
exposed 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 engine has cooled.
EMU33650
Electric shock
Do not touch any electrical parts while starting or operating the engine. They can cause
shock or electrocution.
EMU33660
Power trim and tilt
Body parts can be crushed between the mo-
tor 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
mechanism.
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.
EMU33671
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 prevents 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 remove 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.
EMU33810
Gasoline
Gasoline and its vapors are highly flammable and explosive.
cording to the procedure on page 47 to
reduce the risk of fire and explosion.
Always, refuel ac-
1
Safety information
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, 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.
EMU33900
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.
EMU33780
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.
EMU33740
Boating safety
This section includes a few of the many important safety precautions that you should
follow 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 conditions.
EMU33731
People in the water
Always watch carefully for people in the water, such as swimmers, skiers, or divers,
whenever the engine is running. 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.
EMU33751
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 accelerating 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.
EMU33760
Overloading
Do not overload the boat. Consult the boat
capacity plate or boat manufacturer for maximum weight and number of passengers. Be
sure that weight is properly distributed according to the boat manufacturers instructions. Overloading or incorrect weight
distribution can compromise the boats han-
2
Safety information
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.
ZMU06025
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.
●
Avoid sharp turns or other maneuvers that
make it hard for others to avoid you or understand 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 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.
EMU33790
Weather
Stay informed about the weather. Check
weather forecasts before boating. Avoid
boating in hazardous weather.
EMU33800
Accident reporting
Boat operators are required by law to file a
Boating Accident Report with their state
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 necessary.
EMU33870
Boat education and training
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 Internetbased 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 Administrators (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
online 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,
3
Safety information
go to boatus.org.
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.
EMU33590
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. The rules
presented 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.
EMU33681
Boating organizations
The following organizations provide boating
safety training and information about boating
safety and laws.
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: 1-800-368-5647
www.uscgboating.org
United States Power Squadrons
1-888-FOR-USPS (1-888-367-8777)
www.usps.org
Boat Owners Association of The United
States
1-800-336-BOAT (1-800-336-2628)
www.boatus.com
National Association of State Boating
Law Administrators (NASBLA)
1500 Leestown Road, Suite 330
Lexington, KY 40511 859-225-9497
www.nasbla.org
National Marine Manufacturers Association (NMMA)
200 East Randolph Drive
Suite 5100
Chicago, IL 60601
www.nmma.org
Marine Retailers Association of America
155 N. Michigan Ave. Chicago,
IL 60304
www.mraa.com
EMU33690
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 internationally. (For USA: 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.
4
Safety information
EMU33700
Steering and sailing rules and sound
signals
Whenever two vessels on the water meet
one another, one vessel has the right-ofway; it is called the “stand-on” vessel. 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
vessel will be able to determine how best to
avoid you.
Give-way vessel
The vessel that does not have the right-ofway 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 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.
EMU25521
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:
sel head-on)
Crossing:
er vessel’s path)
Overtaking:
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 GiveWay 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-ofway 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.
(you are approaching another ves-
(you are traveling across the oth-
(you are passing or being
5
Safety information
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, 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 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.
EMU25531
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 powerdriven 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
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 considered 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 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 that can navigate
only in such a channel.
6
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 particular 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 navigating 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 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 information. 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 geographic location. Always consult local boating authorities before driving your boat in
unfamiliar waters.
Safety information
7
Safety information
ZMU01708
8
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 stolen.
1
ZMU06472
1. Outboard motor serial number location
General information
1. Key number
EMU25190
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.
9
General information
EMU33520
Read manuals and labels
Before operating or working on this 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.
EMU33831
Warning labels
If these labels are damaged or missing, contact your Yamaha dealer for replacements.
F25A, F25EA, T25A
1
2
3
10
ZMU06477
F25EHA, F25MHA
General information
1
2
3
ZMU06475
11
General information
12
3
ZMU05670
12
General information
EMU33843
Symbols
The following symbols mean as follows.
Notice/Warning
ZMU05696
Read Owner’s Manual
ZMU05664
Electrical hazard
ZMU05666
Remote control lever/gear shift lever operating direction, dual direction
ZMU05667
Engine start/ Engine cranking
Hazard caused by continuous rotation
ZMU05665
ZMU05668
13
Specifications and requirements
T
T
EMU34520
Specifications
IP:
“(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.
IP:
“*” means, select the engine oil referring to
the chart of engine oil paragraph. For further
information, see page 18.
EMU2821D
Dimension:
Overall length:
F25A 724 mm (28.5 in)
F25EA 724 mm (28.5 in)
F25EHA 1181 mm (46.5 in)
F25MHA 1181 mm (46.5 in)
T25A 735 mm (28.9 in)
Overall width:
398 mm (15.7 in)
Overall height S:
F25EA 1156 mm (45.5 in)
F25EHA 1156 mm (45.5 in)
F25MHA 1157 mm (45.6 in)
Overall height L:
F25A 1283 mm (50.5 in)
F25EA 1284 mm (50.6 in)
F25EHA 1284 mm (50.6 in)
F25MHA 1284 mm (50.6 in)
T25A 1312 mm (51.7 in)
Transom height S:
423 mm (16.7 in)
Transom height L:
F25A 550 mm (21.7 in)
F25EA 550 mm (21.7 in)
F25EHA 550 mm (21.7 in)
F25MHA 550 mm (21.7 in)
T25A 536 mm (21.1 in)
Weight (AL) S:
F25EA 78.0 kg (172 lb)
F25EHA 80.0 kg (176 lb)
F25MHA 77.0 kg (170 lb)
Weight (AL) L:
F25A 82.0 kg (181 lb)
F25EA 79.0 kg (174 lb)
F25EHA 81.0 kg (179 lb)
F25MHA 78.0 kg (172 lb)
T25A 92.0 kg (203 lb)
Performance:
Full throttle operating range:
5000–6000 r/min
Maximum output:
18.4 kW@5500 r/min
(25 HP@5500 r/min)
Idling speed (in neutral):
975 ±50 r/min
Engine:
Type:
4-stroke L
Displacement:
498.0 cm
Bore × stroke:
65.0 × 75.0 mm (2.56 × 2.95 in)
Ignition system:
CDI
Spark plug with resistor (NGK):
DPR6EB-9
Spark plug gap:
0.8–0.9 mm (0.031–0.035 in)
Control system:
F25A Remote control
F25EA Remote control
F25EHA Tiller
F25MHA Tiller
T25A Remote control
Starting system:
F25A Electric
F25EA Electric
3
14
Specifications and requirements
F25EHA Electric
F25MHA Manual
T25A Electric
Starting carburetion system:
Prime start
Valve clearance (cold engine) IN:
0.15–0.25 mm (0.0059–0.0098 in)
Valve clearance (cold engine) EX:
0.25–0.35 mm (0.0098–0.0138 in)
Min. cold cranking amps (CCA/SAE):
F25A 245.0 A
F25EA 245.0 A
F25EHA 245.0 A
T25A 245.0 A
Min. marine cranking amps (MCA/ABYC):
F25A 323.0 A
F25EA 323.0 A
F25EHA 323.0 A
T25A 323.0 A
Min. reserve capacity (RC/SAE):
F25A 52 minutes
F25EA 52 minutes
F25EHA 52 minutes
T25A 52 minutes
Maximum generator output:
14 A
Drive unit:
Gear positions:
Forward-neutral-reverse
Gear ratio:
F25A 2.08(27/13)
F25EA 2.08(27/13)
F25EHA 2.08(27/13)
F25MHA 2.08(27/13)
T25A 2.42(29/12)
Trim and tilt system:
F25A Power trim and tilt
F25EA Manual tilt
F25EHA Manual tilt
F25MHA Manual tilt
T25A Power trim and tilt
Fuel and oil:
Recommended fuel:
Regular unleaded gasoline
Min. pump octane:
86
Fuel tank capacity:
24 L (6.34 US gal, 5.28 Imp.gal)
Recommended engine oil:
4-stroke outboard motor oil
Recommended engine oil group 1*:
SAE 10W-30/10W-40/5W-30
API SE/SF/SG/SH/SJ/SL
Recommended engine oil group 2*:
SAE 15W-40/20W-40/20W-50
API SH/SJ/SL
Lubrication:
Wet sump
Total engine oil quantity (oil pan capacity):
Without oil filter replacement:
1.4 L (1.48 US qt, 1.23 Imp.qt)
With oil filter replacement:
1.6 L (1.69 US qt, 1.41 Imp.qt)
Recommended gear oil:
Hypoid gear oil SAE#90
Gear oil quantity:
F25A 0.320 L
(0.338 US qt, 0.282 Imp.qt)
F25EA 0.320 L
(0.338 US qt, 0.282 Imp.qt)
F25EHA 0.320 L
(0.338 US qt, 0.282 Imp.qt)
F25MHA 0.320 L
(0.338 US qt, 0.282 Imp.qt)
T25A 0.430 L
(0.455 US qt, 0.378 Imp.qt)
Tightening torque for engine:
Spark plug:
17.0 Nm (1.73 kgf-m, 12.5 ft-lb)
Propeller nut:
35.0 Nm (3.57 kgf-m, 25.8 ft-lb)
Engine oil drain bolt:
15
Specifications and requirements
27.0 Nm (2.75 kgf-m, 19.9 ft-lb)
Engine oil filter:
18.0 Nm (1.84 kgf-m, 13.3 ft-lb)
EMU33554
Installation requirements
EMU33563
Boat horsepower rating
EWM01560
WARNING
Overpowering a boat can cause severe
instability.
Before installing the outboard motor(s), confirm that the total horsepower of your motor(s) does not exceed the boats maximum
horsepower rating. See the boat’s capacity
plate or contact the manufacturer.
EMU33571
Mounting motor
EWM01570
WARNING
Improper mounting of the outboard mo-
●
tor could result in hazardous conditions such as poor handling, loss of
control, or fire hazards.
Because the motor is very heavy, spe-
●
cial 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 complete rigging instructions. For further information, see page
39.
EMU33581
Remote control requirements
EWM01580
WARNING
If the engine starts in gear, the boat can
●
move suddenly and unexpectedly, possibly causing a collision or throwing
passengers overboard.
●
If the engine ever starts in gear, the
start-in-gear protection device is not
working correctly and you should discontinue using the outboard. Contact
your Yamaha dealer.
The remote control unit must be equipped
with a start-in-gear protection device(s). This
device prevents the engine from starting unless it is in neutral.
EMU25694
Battery requirements
EMU25713
Specifications of Battery
Use a fully charged battery that meets the
following specifications. The engine cannot
be started if battery voltage is too low.
Minimum cold cranking amps (CCA/
SAE):
F25A 245.0 A
F25EA 245.0 A
F25EHA 245.0 A
T25A 245.0 A
Minimum marine cranking amps (MCA/
ABYC):
F25A 323.0 A
F25EA 323.0 A
F25EHA 323.0 A
T25A 323.0 A
Minimum reserve capacity (RC/SAE):
F25A 52 minutes
F25EA 52 minutes
F25EHA 52 minutes
T25A 52 minutes
ECM01061
NOTICE
Do not use a battery that does not meet
the specified capacity. If a battery that
does not meet specifications is used, the
electric system could perform poorly or
be overloaded, causing electric system
16
Specifications and requirements
damage.
EMU36290
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.
[EWM01820]
EMU36300
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.
EMU25730
Without a rectifier or Rectifier
Regulator
ECM01090
NOTICE
A battery cannot be connected to models
that do not have a rectifier or Rectifier
Regulator.
If you wish to use a battery with the models
without a rectifier or Rectifier Regulator, install an optional Rectifier Regulator.
Using a maintenance-free battery with the
above models can shorten the life of the battery significantly.
Install an optional Rectifier Regulator or use
accessories rated to withstand 18 volts or
higher with the above models. Consult your
Yamaha dealer for details on installing an
optional Rectifier Regulator.
EMU34192
Propeller selection
Next to selecting an outboard, choosing the
right propeller is one of the most important
purchasing decisions a boater can make.
The type, size, and design of your propeller
have a direct impact on acceleration, top
speed, fuel economy, and even engine life.
Yamaha designs and manufactures propellers for every Yamaha outboard motor and
every application.
Your outboard motor came with a Yamaha
propeller chosen to perform well over a
range of applications, but there may be uses
where a different propeller would be more
appropriate.
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, chose 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, chose the propeller
that lets the engine run in the proper range
for your maximum load but remember that
you may need to reduce your throttle setting
to stay within the recommended engine
speed range when carrying lighter loads.
For instructions on propeller removal and installation, see page 82.
x
-
123
ZMU04604
1. Propeller diameter in inches
2. Propeller pitch in inches
3. Type of propeller (propeller mark)
17
Specifications and requirements
following chart according to the average
temperatures in your area.
x
-
123
ZMU04606
1. Propeller diameter in inches
2. Propeller pitch in inches
3. Type of propeller (propeller mark)
EMU25770
Start-in-gear protection
Yamaha outboard motors or Yamaha-approved remote control units are equipped
with start-in-gear protection device(s). This
feature permits the engine to be started only
when it is in neutral. Always select neutral
before starting the engine.
EMU31444
Engine oil requirements
Recommended engine oil:
YAMALUBE 4-M FC-W oil or 4-stroke
motor oil with a combination of the following SAE and API oil classifications
Engine oil type SAE:
10W-30 or 10W-40
Engine oil grade API:
SE, SF, SG, SH, SJ, SL
Total engine oil quantity (oil pan capacity):
Without oil filter replacement:
1.4 L (1.48 US qt, 1.23 Imp.qt)
With oil filter replacement:
1.6 L (1.69 US qt, 1.41 Imp.qt)
If the recommended engine oil grades are
not available, select an alternative from the
EMU36360
Fuel requirements
EMU36781
Gasoline
Use a good quality gasoline that meets the
minimum octane rating. If knocking or pinging occurs, use a different brand of gasoline
or premium unleaded fuel. Yamaha recomends that you use alcohol-free (see
Gasohol) gasoline whenever possible.
Recommended gasoline:
Regular unleaded gasoline with a minimum Octane rating of 86 (Pump Octane Number) = (R+M)/2
ECM01981
NOTICE
●
Do not use leaded gasoline. Leaded
gasoline can seriously 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
18
Specifications and requirements
has been stored in clean containers.
Gasohol
There are two types of gasohol: gasohol containing ethanol (E10) and that containing
methanol. Ethanol can be used if the ethanol
content does not exceed 10% and the fuel
meets the minimum octane ratings. E85 is a
fuel containing 85% ethanol and must not be
used in your outboard motor. All ethanol
blends containing more than 10% ethanol
can cause fuel system damage or cause engine starting and running problems. Yamaha
does not recommend gasohol containing
methanol because it can cause fuel system
damage or engine performance problems.
It is recommended that you install a waterseparating marine fuel filter assembly (10
micron minimum) between your boat’s fuel
tank and outboard motor when using ethanol. Ethanol is known to allow moisture to be
absorbed into boat fuel tanks and systems.
Moisture in the fuel can cause corrosion of
metallic fuel system components, starting
and running complaints and require additional fuel system maintenance.
EMU27270
Ring Free Fuel Additive
Gasoline is a precise blend of many different
substances, each chosen to give certain
characteristics. Gasoline blends have been
changing in recent years in response to concerns about pollution and resulting emissions regulations. One of the most obvious
changes has been the elimination of lead
from most fuels.
As gasoline has changed, the amount of additives such as aromatics and oxygenates
has increased. These additives are important for the engines in passenger cars, but
they can have detrimental effects in marine
engines, because of increased deposits in
the combustion chamber. When enough deposits collect, piston rings begin sticking.
Performance drops and engine wear increases dramatically.
While many additives available may reduce
deposits, Yamaha recommends the use of
Ring Free Fuel Additive
your Yamaha dealer.
tive
has repeatedly proven its ability to clean
combustion deposits from inside the engine,
notably the critical piston-ring-land area, and
fuel system components. Follow product labeling for use instructions.
EMU36880
, available from
Ring Free Fuel Addi-
Muddy or acidic water
Yamaha strongly recommends that you have
your dealer install the optional chromiumplated water pump kit if you use the outboard
motor in muddy or acidic water conditions.
However, depending on the model it might
not be required.
EMU36330
Anti-fouling paint
A clean hull improves boat performance. The
boat bottom should be kept as clean of marine growth as possible. If necessary, the
boat bottom can be coated with an anti-fouling paint approved for your area to inhibit
marine growth.
Do not use anti-fouling paint which includes
copper or graphite. These paints can cause
more rapid engine corrosion.
19
Specifications and requirements
EMU36341
Motor disposal requirements
Never illegally discard (dump) the motor.
Yamaha recommends consulting the dealer
about discarding the motor.
EMU36351
Emergency equipment
Keep the following items onboard in case
there is trouble with the motor.
●
A tool kit with assorted screwdrivers, pliers, wrenches (including metric sizes), and
electrical tape.
●
Waterproof flashlight with extra batteries.
●
An extra engine shut-off cord (lanyard)
with clip.
●
Spare parts, such as an extra set of spark
plugs.
Consult your Yamaha dealer for details.
EMU25221
Emission control information
EMU25230
North American models
This engine conforms to U.S. Environmental
Protection Agency (EPA) regulations for marine SI engines. See the label affixed to your
engine for details.
EMU25242
Approval label of emission control certificate
This label is attached to the bottom cowling.
New Technology; (4-stroke/HPDI) EM
1. Approval label location
EMU25262
Manufactured date label
This label is attached to the clamp bracket or
the swivel bracket.
1
1. Manufactured date label location
1
ZMU06478
ZMU05159
ZMU06480
20
Specifications and requirements
1
ZMU06391
1. Manufactured date label location
Manufactured:
ZMU04346
EMU25273
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.
EMU25280
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 standards for marine engines.
ZMU01702
EMU25290
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.
1. Star labels location
1
ZMU06481
ZMU01703
EMU25300
Three Stars—Ultra Low Emission
The three-star label identifies engines that
meet the Air Resources Board’s 2008 exhaust emission standards. Engines meeting
21
Specifications and requirements
these standards have 65% lower emissions
than One Star-Low-Emission engines.
ZMU01704
EMU33861
Four Stars—Super Ultra Low Emission
The four-star label identifies engines that
meet the Air Resources Board’s Sterndrive
and Inboard marine engine 2009 exhaust
emission standards. Personal Watercraft
and Outboard marine engines may also
comply with these standards. Engines meeting these standards have 90% lower emissions than One Star-Low-Emission engines.
22
ZMU05663
Components
T
EMU2579M
Components diagram
IP:
* May not be exactly as shown; also may not be included as standard equipment on all models.
F25A, F25EA, T25A
1
13
11
10
9
8
1. Top cowling
2. Cowling lock lever
3. Idle hole
4. Drain screw
5. Anti-cavitation plate
6. Trim tab
7. Propeller
8. Cooling water inlet
9. Clamp bracket
10. Power trim and tilt switch*
11. Alert indicator(s)
12. Tilt support knob*
13. Flushing device
14. Clamp screw*
15. Tilt lock lever*
2
12
3
11
4
13
14
16
15
17
5
6
7
16. Remote control box (side mount type)*
17. Fuel tank*
ZMU06605
23
Components
F25EHA, F25MHA
1
12
13
1
14
11
10
9
8
1. Top cowling
2. Cowling lock lever
3. Idle hole
4. Drain screw
5. Anti-cavitation plate
6. Trim tab
7. Propeller
8. Cooling water inlet
9. Trim rod
10. Clamp bracket
11. Restraint cable attachment
12. Manual starter handle*
13. Gear shift lever
14. Throttle grip
15. Throttle friction adjuster
16. Engine stop button/Engine shut-off switch
17. Clip
18. Alert indicator(s)
19. Clamp screw
20. Steering friction lever
20
19
17
18
1
15
16
13
22
2
21
3
4
20
17
19
18
15
16
22
5
6
24
21
23
7
21. Tilt lock lever
22. Flushing device
23. Starter button*
24. Fuel tank*
EMU25802
Fuel tank
If your model was equipped with a portable
fuel tank, its function is as follows.
EWM00020
WARNING
The fuel tank supplied with this engine is
its dedicated fuel reservoir and must not
be used as a fuel storage container. Commercial users should conform to relevant
licensing or approval authority regulations.
14
ZMU06606
24
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