Yamaha F2.5D, F2.5MHD Owner's Manual
F2.5D
ZMU01690
Important manual information
EMU25100
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.
The Safety Alert Symbol means ATTENTION! BECOME ALERT! YOUR SAFETY IS INVOLVED!
EWM00780
WARNING
Failure to follow WARNING instructions
could result in severe injury or death
machine operator, a bystander, or a person inspecting or repairing the outboard
motor.
to the
your machine and this manual. If there is any
question concerning this manual, please consult your Yamaha dealer.
NOTE:
The F2.5MHD 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.
EMU25130
F2.5D
OWNER’S MANUAL
©2004 by Yamaha Motor Corporation,
USA
1st Edition, January 2004
All rights reserved.
Any reprinting or unauthorized use
without the written permission of
Yamaha Motor Corporation, USA
is expressly prohibited.
Printed in France
P/N LIT-18626-05-96
ECM00700
CAUTION:
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 current product
information available at the time of printing,
there may be minor discrepancies between
Table of contents
General information ...................... 1
Identification numbers record ...... 1
Outboard motor serial number ....... 1
Emission control information ....... 1
North American models.................. 1
Star labels ...................................... 2
Safety information ....................... 3
Important labels........................... 4
Warning labels................................ 4
Caution labels................................. 5
Basic boating rules
(Rules of the road) ................... 5
Steering and sailing rules and
sound signals.............................. 5
Rules when encountering
vessels........................................ 6
Other special situations.................. 7
Fueling instructions ..................... 8
Gasoline ......................................... 9
Engine oil........................................ 9
Propeller selection....................... 9
Basic components ...................... 11
Main components...................... 11
Fuel tank....................................... 11
Fuel tank cap................................ 12
Air vent screw............................... 12
Fuel cock...................................... 12
Tiller handle.................................. 12
Gear shift lever............................. 13
Throttle grip .................................. 13
Throttle indicator........................... 13
Throttle friction adjuster................ 13
Engine stop lanyard switch........... 14
Engine stop button ....................... 14
Choke knob for pull type............... 14
Manual starter handle................... 14
Steering friction adjuster............... 15
Trim rod (tilt pin) ........................... 15
Tilt support lever for
manual tilt model....................... 15
Top cowling lock lever
(pull up type) ............................. 15
Carrying handle............................ 16
Operation ..................................... 17
Installation................................. 17
Mounting the outboard motor ....... 17
Clamping the outboard motor....... 18
Breaking in engine .................... 19
Procedure for 4-stroke models ..... 19
Preoperation checks ................. 19
Fuel .............................................. 19
Controls ........................................ 19
Engine .......................................... 19
Checking the engine oil level........ 20
Filling fuel.................................. 20
Ring Free Fuel Additive................ 20
Operating engine ...................... 21
Feeding fuel.................................. 21
Starting engine ............................. 21
Warming up engine................... 23
Manual start models ..................... 23
Shifting ...................................... 23
Forward (tiller handle and
remote control models) ............. 23
Reverse ........................................ 24
Stopping engine........................ 24
Procedure..................................... 24
Trimming outboard motor.......... 25
Adjusting trim angle for
manual tilt models ..................... 25
Adjusting boat trim........................ 26
Tilting up and down................... 27
Procedure for tilting up
(manual tilt models)................... 27
Procedure for tilting down
(manual tilt models)................... 28
Maintenance ................................ 30
Specifications............................ 30
Transporting and storing
outboard motor ...................... 30
Clamp screw mounting models .... 31
Storing outboard motor................. 31
Procedure..................................... 32
Lubrication
(except oil injection models)...... 33
Table of contents
Cleaning and anticorrosion
measures .................................. 33
Cleaning the outboard motor........ 33
Checking painted
surface of motor ........................ 34
Periodic maintenance................ 34
Replacement parts ....................... 34
Maintenance chart........................ 35
Greasing....................................... 36
Cleaning and adjusting
spark plug ................................. 36
Checking fuel system ................... 37
Inspecting idling speed................. 37
Changing engine oil...................... 38
Checking wiring and
connectors ................................ 39
Exhaust leakage........................... 40
Water leakage .............................. 40
Engine oil leakage ........................ 40
Checking propeller ....................... 40
Removing the propeller ................ 41
Installing the propeller .................. 41
Changing gear oil ......................... 41
Inspecting and replacing
anode(s).................................... 42
Checking top cowling ................... 43
Coating the boat bottom............... 43
YAMAHA MOTOR
CORPORATION, U.S.A.
FOUR-STROKE OUTBOARD
MOTOR THREE-YEAR
LIMITED WARRANTY ........... 53
IMPORTANT WARRANTY
INFORMATION IF YOU USE
YOUR YAMAHA OUTSIDE
U.S.A. OR CANADA .............. 55
Trouble Recovery ........................ 44
Troubleshooting ........................ 44
Temporary action in
emergency ............................. 47
Impact damage............................. 47
Starter will not operate ................. 47
Emergency Starting Engine.......... 48
Treatment of
submerged motor ................... 50
Procedure..................................... 50
Consumer information................51
Important warranty information
for U.S.A. and Canada ........... 51
General information
EMU25170
Identification numbers record
EMU25182
Outboard motor serial number
The outboard motor serial number is stamped
on the label attached to the port side of the
clamp bracket or the upper part of the swivel
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.
EMU25241
Approval label of emission control certificate
This label is attached to the bottom cowling.
New Technology; (4-stroke/HPDI) EM
1. Approval label location
1. Outboard motor serial number location
EMU25220
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.
EMU25261
Manufactured date label
This label is attached to the clamp bracket or
the swivel bracket.
1. Manufactured date label location
1
Manufactured:
General information
ZMU04346
EMU25272
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.
1. Star labels location
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 en-
gines.
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.
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
these standards have 65% lower emissions
than One Star-Low-Emission engines.
2
General information
ZMU01704
EMU25360
Safety information
● Before mounting or operating the outboard
motor, read this entire manual. Reading it
should give you an understanding of the
motor and its operation.
● Before operating the boat, read any own-
er’s or operator’s manuals supplied with it
and all labels. Be sure you understand each
item before operating.
● Do not overpower the boat with this out-
board 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 horsepower capacity of the boat.
If the rated horsepower capacity of the boat
is unknown, consult the dealer or boat manufacturer.
● Do not modify the outboard. Modifications
could make the motor unfit or unsafe to use.
● Never operate after drinking alcohol or tak-
ing drugs. About 50% of all boating fatalities
involve intoxication.
● Have an approved personal flotation device
(PFD) on board for every occupant. It is a
good idea to 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.
● Gasoline is highly flammable, and its va-
pors are flammable and explosive. Handle
and store gasoline carefully. Make sure
there are no gas fumes or leaking fuel before starting the engine.
● 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.
● Check throttle, shift, and steering for proper
operation before starting the engine.
● Attach the engine stop switch lanyard cord
to a secure place on your clothing, or your
arm or leg while operating. If you accidentally leave the helm, the cord will pull from
the switch, stopping the engine.
● Know the marine laws and regulations
where you will be boating—and obey them.
For basic boating rules, see “Rules of the
road” on page 5.
● Stay informed about the weather. Check
weather forecasts before boating. Avoid
boating in hazardous weather.
● Tell someone where you are going: leave a
Float Plan with a responsible person. Be
sure to cancel the Float Plan when you return.
● Use 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.
3
● Always watch carefully for swimmers during
the engine operation.
● Stay away from swimming areas.
● When a swimmer is in the water near you
shift into neutral and shut off the engine.
Be informed about boating safety. Additional
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: 1-800-368-5647
National Marine Manufacturers Association (NMMA)
401 N. Michigan Ave.
Chicago, Il 60611
Marine Retailers Association of America
155 N. Michigan Ave.
Chicago, Il 60601
EMU25380
Important labels
EMU25395
Warning labels
General information
EMU25401
Label
EWM01260
WARNING
● Be sure shift control is in neutral before
starting engine. (except 2HP)
● Do not touch or remove electrical parts
when starting or during operation.
● Keep hands, hair, and clothes away from
flywheel and other rotating parts while
engine is running.
EMU25441
Label
EWM01311
WARNING
LEAKING FUEL COULD CAUSE A FIRE.
Before tilting up the engine or laying it on
its side:
● Turn the fuel cock to the “closed” posi-
tion.
● Tighten the air-vent screw on the fuel
tank cap.
4
General information
EMU25464
Caution labels
EMU25481
Label
ECM01200
CAUTION:
Store the engine only as shown.
Otherwise, engine damage could result
from Leaking oil.
EMU25500
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 Auxiliary or Department of
Motor Vehicles for a complete set of rules
governing the waters in which you will be using your boat.
EMU25510
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 “burdened” vessel. These
rules determine which vessel has the right-ofway, 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-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,
5
General information
“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” ves-
sels.
EMU25520
Rules when encountering vessels
There are three main situations which 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
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 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.
6
General information
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.
EMU25530
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 which 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 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
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.
7
General information
EMU25540
Fueling instructions
EWM00010
WARNING
GASOLINE AND ITS VAPORS ARE HIGHLY FLAMMABLE AND EXPLOSIVE!
ZMU01708
● Do not smoke when refueling, and keep
away from sparks, flames, or other
sources of ignition.
● Stop engine before refueling.
● Refuel in a well-ventilated area. Refuel
portable fuel tanks off the boat.
8
General information
● Take care not to spill gasoline. If gaso-
line spills, wipe it up immediately with
dry rags.
● Do not overfill the fuel tank.
● Tighten the filler cap securely after refu-
eling.
● If you should swallow some gasoline, in-
hale a lot of gasoline vapor, or get gasoline in your eyes, get immediate medical
attention.
● If any gasoline spills onto your skin, im-
mediately wash with soap and water.
Change clothing if gasoline spills on it.
● Touch the fuel nozzle to the filler open-
ing or funnel to help prevent electrostatic sparks.
ECM00010
CAUTION:
Use only new clean gasoline which has
been stored in clean containers and is not
contaminated with water or foreign matter.
EMU25570
Gasoline
If knocking or pinging occurs, use a different
brand of gasoline or premium unleaded fuel.
EMU25680
Engine oil
Recommended engine oil:
4-stroke motor oil with a combination of
corresponding SAE and API as shown
in the chart
Engine oil quantity (excluding oil filter):
0.4 L (0.42 US qt) (0.35 Imp.qt)
ECM01050
CAUTION:
All 4-stroke engines are shipped from the
factory without engine oil.
Recommended gasoline:
Regular unleaded gasoline with a
minimum octane rating of 86 (Pump
Octane Number) = (R+M)/2
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. Yamaha
does not recommended gasohol containing
methanol because it can cause fuel system
damage or engine performance problems.
9
ZMU01710
EMU25741
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 maintained. Conversely, a larger-pitch propeller is
more suitable for a smaller operating load.
Yamaha dealers stock a range of propellers,
and can advise you and install a propeller on
your outboard that is best suited to your application.
General information
1. Propeller diameter in inches
2. Propeller pitch in inches
3. Type of propeller (propeller mark)
NOTE:
Select a propeller which will allow the engine
to reach the middle or upper half of the operating range at full throttle with the maximum
boat load. If operating conditions such as light
boat loads then allow the engine r/min to rise
above the maximum recommended range, reduce the throttle setting to maintain the engine in the proper operating range.
For instructions on propeller removal and installation, see page 40.
10
Basic components
EMU25795
Main components
NOTE:
* May not be exactly as shown; also may not be included as standard equipment on all models.
1. Top cowling
2. Top cowling lock lever(s)
3. Carrying handle
4. Steering friction screw
5. Anti-cavitation plate
6. Propeller
7. Cooling water inlet
8. Trim rod
9. Clamp bracket
10.Tiller handle
11.Air vent screw
12.Fuel tank cap
13.Manual starter handle
14.Engine stop button/Engine stop lanyard
switch
15.Clamp screw
16.Rope attachment
11
17.Gear shift lever
18.Choke knob
EMU25821
Fuel tank
If your model included a fuel tank, its parts
and functions are as follows.
Basic components
1. Fuel tank cap
2. Air vent screw
EMU25850
Fuel tank cap
This cap seals the fuel tank. When removed,
the tank can be filled with fuel. To remove the
cap, turn it counterclockwise.
EMU25860
Air vent screw
This screw is on the fuel tank cap. To loosen
the screw, turn it counterclockwise.
EMU25872
Fuel cock
The fuel cock turns on and off the supply of
fuel from the fuel tank to the engine.
1. Close position
EMU25891
Open
With the lever/knob in this position, fuel flows
to the carburetor.
Normal running is done with the lever/knob in
this position.
1. Open position
EMU25911
Tiller handle
To change direction, move the tiller handle to
the left or right as necessary.
1. Fuel cock
EMU25881
Close
To stop fuel flow to the engine, turn the lever
or knob to close position.
Always turn the lever or knob to close position
when the engine is not running.
12
Basic components
EMU25930
Gear shift lever
Pulling the gear shift lever towards you puts
the engine in forward gear so that the boat
moves ahead.
1. Forward “”
2. Neutral “”
EMU25941
Throttle grip
The throttle grip is on the tiller handle. Turn
the grip counterclockwise to increase speed
and clockwise to decrease speed.
1. Throttle indicator
EMU25970
Throttle friction adjuster
A friction device provides adjustable resistance to movement of the throttle grip or the
remote control lever, and can be set according to operator preference.
To increase resistance, turn the adjuster
clockwise. To decrease resistance, turn the
adjuster counterclockwise.
EWM00030
WARNING
EMU25961
Throttle indicator
The fuel consumption curve on the throttle indicator shows the relative amount of fuel consumed for each throttle position. Choose the
setting that offers the best performance and
fuel economy for the desired operation.
Do not overtighten the friction adjuster. If
there is too much resistance, it could be
difficult to move throttle lever or grip,
which could result in an accident.
When constant speed is desired, tighten the
adjuster to maintain the desired throttle setting.
13
Basic components
EMU25990
Engine stop lanyard switch
The lock plate must be attached to the engine
stop switch for the engine to run. The lanyard
should be attached to a secure place on the
operator’s clothing, or arm or leg. Should the
operator fall overboard or leave the helm, the
lanyard will pull out the lock plate, stopping ignition to the engine. This will prevent the boat
from running away under power.
EWM00120
WARNING
● Attach the engine stop switch lanyard to
a secure place on your clothing, or your
arm or leg while operating.
● Do not attach the lanyard to clothing
that could tear loose. Do not route the
lanyard where it could become entangled, preventing it from functioning.
● Avoid accidentally pulling the lanyard
during normal operation. Loss of engine
power means the loss of most steering
control. Also, without engine power, the
boat could slow rapidly. This could
cause people and objects in the boat to
be thrown forward.
EMU26001
Engine stop button
To open the ignition circuit and stop the engine, push this button.
EMU26011
Choke knob for pull type
To supply the engine with the rich fuel mixture
required to start, pull out this knob.
NOTE:
The engine cannot be started with the lock
plate removed.
1. Lock plate
2. Lanyard
EMU26070
Manual starter handle
To start the engine, first gently pull the handle
out until resistance is felt. From that position,
then pull the handle straight out quickly to
crank the engine.
14
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