Yamaha E25B User manual

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Read this manual carefully before operating this
outboard motor.
OWNER’S MANUAL
E25B
25B
25X
30H
69R-28199-28-E0

EMU25052
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
EMU25105
To the owner
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 ob-
tain 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 fol-
low this symbol to avoid possible injury or
death.
WARNING
EWM00781
A WARNING indicates a hazardous situa-
tion which, if not avoided, could result in
death or serious injury.
NOTICE
ECM00701
A NOTICE indicates special precautions
that must be taken to avoid damage to the
outboard motor or other property.
T
IP:
A TIP provides key information to make pro-
cedures easier or clearer.
Yamaha continually seeks advancements in
product design and quality. Therefore, while
this manual contains the most current prod-
uct information available at the time of print-
ing, there may be minor discrepancies
between your machine and this manual. If
there is any question concerning this manu-
al, please consult your Yamaha dealer.
To ensure long product life, Yamaha recom-
mends that you use the product and perform
the specified periodic inspections and main-
tenance by correctly following the instruc-
tions in the owner’s manual. Any damage
resulting from neglect of these instructions is
not covered by warranty.
Some countries have laws or regulations re-
stricting users from taking the product out of
the country where it was purchased, and it
may be impossible to register the product in
the destination country. Additionally, the
warranty may not apply in certain regions.
When planning to take the product to another
country, consult the dealer where the prod-
uct was purchased for further information.
If the product was purchased used, please
consult your closest dealer for customer re-
registration, and to be eligible for the speci-
fied services.
T
IP:
The E25BMH, 25BMH, 25XMH, 30HMH,
30HW and the standard accessories are
used as a base for the explanations and illus-
trations in this manual. Therefore some
items may not apply to every model.
EMU25121
E25B, 25B, 25X, 30H
OWNER’S MANUAL
©2008 by Yamaha Motor Co., Ltd.
1st Edition, April 2008
All rights reserved.
Any reprinting or unauthorized use
without the written permission of
Yamaha Motor Co., Ltd.
is expressly prohibited.
Printed in Japan

Table of contents
Safety information............................. 1
Outboard motor safety .................... 1
Propeller............................................ 1
Rotating parts.................................... 1
Hot parts ........................................... 1
Electric shock.................................... 1
Engine shut-off cord (lanyard)........... 1
Gasoline............................................ 1
Gasoline exposure and spills ............ 1
Carbon monoxide.............................. 1
Modifications ..................................... 2
Boating safety ................................. 2
Alcohol and drugs ............................. 2
Personal flotation devices ................. 2
People in the water ........................... 2
Passengers ....................................... 2
Overloading....................................... 2
Avoid collisions ................................. 2
Weather ............................................ 3
Passenger training ............................ 3
Boating safety publications ............... 3
Laws and regulations ........................ 3
General information .......................... 4
Identification numbers record.......... 4
Outboard motor serial number .......... 4
Key number....................................... 4
EC Declaration of Conformity
(DoC) ............................................. 4
CE Marking ..................................... 4
C-Tick label ..................................... 5
Read manuals and labels................ 6
Warning labels .................................. 6
Specifications and requirements..... 9
Specifications .................................. 9
Installation requirements ............... 10
Boat horsepower rating................... 10
Mounting motor ............................... 11
Remote control requirements........ 11
Battery requirements..................... 11
Battery specifications ...................... 11
Mounting battery ............................. 11
Multiple batteries............................. 11
Without a rectifier or Rectifier
Regulator ...................................... 11
Propeller selection......................... 12
Start-in-gear protection ................. 12
Engine oil requirements ................ 13
Fuel requirements......................... 13
Gasoline .......................................... 13
Muddy or acidic water................... 13
Anti-fouling paint ........................... 13
Motor disposal requirements......... 13
Emergency equipment.................. 14
Components .................................... 15
Components diagram.................... 15
Fuel tank ......................................... 15
Fuel joint.......................................... 16
Fuel gauge ...................................... 16
Fuel tank cap...................................16
Air vent screw..................................16
Remote control box ......................... 16
Remote control lever ....................... 16
Neutral interlock trigger ................... 17
Neutral throttle lever........................17
Choke switch ................................... 17
Tiller handle..................................... 17
Gear shift lever................................17
Throttle grip ..................................... 18
Throttle indicator ............................. 18
Throttle friction adjuster...................18
Engine shut-off cord (lanyard) and
clip................................................. 19
Engine stop button .......................... 19
Choke knob for pull type .................20
Manual starter handle .....................20
Main switch ..................................... 20
Steering friction adjuster .................20
Trim tab ........................................... 21
Trim rod (tilt pin) .............................. 21
Shallow water lever ......................... 21
Tilt lock mechanism......................... 22
Tilt support knob.............................. 22
Top cowling lock lever(s)
(turn type)...................................... 22
2-pin connector ............................... 23
Engine control system ................... 24
Alert system .................................. 24
Overheat alert ................................. 24
Installation ....................................... 25

Table of contents
Installation ..................................... 25
Mounting the outboard motor.......... 25
Clamping the outboard motor ......... 26
Operation ......................................... 28
First-time operation ....................... 28
Breaking in engine .......................... 28
Getting to know your boat ............... 28
Checks before starting engine ...... 28
Fuel level......................................... 29
Remove cowling.............................. 29
Fuel system..................................... 29
Controls........................................... 29
Engine shut-off cord (lanyard)......... 30
Oil.................................................... 30
Engine............................................. 30
Install cowling.................................. 30
Battery............................................. 31
Filling fuel and engine oil............... 31
Filling fuel for portable tank............. 31
Gasoline and oil mixing (100:1) ...... 31
Operating engine........................... 33
Feeding fuel (portable tank) ............ 33
Starting engine................................ 34
Checks after starting engine ......... 39
Cooling water .................................. 39
Warming up engine ....................... 39
Choke start models ......................... 39
Checks after engine warm-up ....... 39
Shifting ............................................ 39
Stop switches.................................. 39
Shifting .......................................... 39
Stopping boat ................................ 41
Stopping engine ............................ 41
Procedure ....................................... 41
Trimming outboard motor.............. 42
Adjusting trim angle for manual tilt
models .......................................... 43
Adjusting boat trim .......................... 43
Tilting up and down ....................... 44
Procedure for tilting up (manual tilt
models) ......................................... 45
Procedure for tilting down (manual
tilt models) .................................... 46
Shallow water................................ 46
Cruising in shallow water (manual
tilt models)..................................... 46
Cruising in other conditions........... 47
Maintenance .................................... 48
Transporting and storing
outboard motor ........................... 48
Clamp screw mounting models ....... 48
Storing outboard motor ...................48
Procedure........................................ 49
Lubrication....................................... 50
Cleaning the outboard motor........... 50
Checking painted surface of
motor............................................. 50
Periodic maintenance ................... 50
Replacement parts .......................... 51
Severe operating conditions............ 51
Maintenance chart 1........................ 52
Maintenance chart 2........................ 54
Greasing.......................................... 55
Cleaning and adjusting spark
plug ............................................... 55
Checking fuel filter........................... 56
Inspecting idling speed.................... 57
Checking wiring and connectors ..... 57
Checking propeller .......................... 57
Removing propeller ......................... 58
Installing propeller ........................... 58
Changing gear oil ............................ 59
Cleaning fuel tank ...........................60
Inspecting and replacing
anode(s)........................................ 61
Checking battery (for electric start
models) ......................................... 61
Connecting the battery .................... 62
Disconnecting the battery................ 62
Trouble Recovery............................ 63
Troubleshooting ............................ 63
Temporary action in emergency .... 66
Impact damage ............................... 66
Replacing fuse ................................ 66
Starter will not operate .................... 67
Emergency starting engine .............67
Treatment of submerged motor ..... 68

1
Safety information
EMU33622
Outboard motor safety
Observe these precautions at all times.
EMU36500
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.
●
Shut off 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 inter-
nal rotating parts of the engine, resulting in
serious injury or death.
Keep the top cowling in place whenever pos-
sible. Do not remove or replace the cowling
with the engine running.
Only operate the engine with the cowling re-
moved according to the specific instructions
in the manual. Keep hands, feet, hair, jewel-
ry, 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 en-
gine has cooled.
EMU33650
Electric shock
Do not touch any electrical parts while start-
ing or operating the engine. They can cause
shock or electrocution.
EMU33671
Engine shut-off cord (lanyard)
Attach the engine shut-off cord so that the
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 at-
tach the cord to clothing that could tear
loose, or route the cord where it could be-
come entangled, preventing it from function-
ing.
Do not route the cord where it is likely to be
accidentally pulled out. If the cord is pulled
during operation, the engine will shut off and
you will lose most steering control. The boat
could slow rapidly, throwing people and ob-
jects forward.
EMU33810
Gasoline
Gasoline and its vapors are highly flam-
mable and explosive. Always, refuel ac-
cording to the procedure on page 33 to
reduce the risk of fire and explosion.
EMU33820
Gasoline exposure and spills
Take care not to spill gasoline. If gasoline
spills, wipe it up immediately with dry rags.
Dispose of rags properly.
If any gasoline spills onto your skin, immedi-
ately wash with soap and water. Change
clothing if gasoline spills on it.
If you swallow gasoline, inhale a lot of gaso-
line vapor, or get gasoline in your eyes, get
immediate medical attention. Never siphon
fuel by mouth.
EMU33900
Carbon monoxide
This product emits exhaust gases which
contain carbon monoxide, a colorless, odor-
less gas which may cause brain damage or

Safety information
2
death when inhaled. Symptoms include nau-
sea, dizziness, and drowsiness. Keep cock-
pit and cabin areas well ventilated. Avoid
blocking exhaust outlets.
EMU33780
Modifications
Do not attempt to modify this outboard mo-
tor. 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 im-
portant safety precautions that you should
follow when boating.
EMU33710
Alcohol and drugs
Never operate after drinking alcohol or tak-
ing drugs. Intoxication is one of the most
common factors contributing to boating fatal-
ities.
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 boat-
ing conditions.
EMU33730
People in the water
Always watch carefully for people in the wa-
ter, such as swimmers, skiers, or divers,
whenever the engine is running. When
someone is in the water near the boat, shift
into neutral and shut off the motor.
Stay away from swimming areas. Swimmers
can be hard to see.
The propeller can keep moving even when
the motor is in neutral. Shut off the engine
when a person is in the water near you.
EMU33750
Passengers
Consult your boat manufacturer’s instruc-
tions for details about appropriate passenger
locations in your boat and be sure all pas-
sengers are positioned properly before ac-
celerating 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 direc-
tion. Even when people are positioned prop-
erly, alert your passengers if you must make
any unusual maneuver. Always avoid jump-
ing waves or wakes.
EMU33760
Overloading
Do not overload the boat. Consult the boat
capacity plate or boat manufacturer for max-
imum weight and number of passengers. Be
sure that weight is properly distributed ac-
cording to the boat manufacturers instruc-
tions. Overloading or incorrect weight
distribution can compromise the boats han-
dling and lead to an accident, capsizing or
swamping.
EMU33771
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

Safety information
3
Operate defensively at safe speeds and
keep a safe distance away from people, ob-
jects, 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 un-
derstand where you are going.
●
Avoid areas with submerged objects or
shallow water.
● Ride within your limits and avoid aggres-
sive maneuvers to reduce the risk of loss
of control, ejection, and collision.
● Take early action to avoid collisions. Re-
member, boats do not have brakes , and
stopping the engine or reducing throttle
can reduce the ability to steer. If you are
not sure that you can stop in time before
hitting an obstacle, apply throttle and turn
in another direction.
EMU33790
Weather
Stay informed about the weather. Check
weather forecasts before boating. Avoid
boating in hazardous weather.
EMU33880
Passenger training
Make sure at least one other passenger is
trained to operate the boat in the event of an
emergency.
EMU33890
Boating safety publications
Be informed about boating safety. Additional
publications and information can be obtained
from many boating organizations.
EMU33600
Laws and regulations
Know the marine laws and regulations where
you will be boating- and obey them. Several
sets of rules prevail according to geographic
location, but all are basically the same as the
International Rules of the Road.

4
General information
EMU25171
Identification numbers record
EMU25183
Outboard motor serial number
The outboard motor serial number is
stamped on the label attached to the port
side of the clamp bracket.
Record your outboard motor serial number in
the spaces provided to assist you in ordering
spare parts from your Yamaha dealer or for
reference in case your outboard motor is sto-
len.
EMU25190
Key number
If a main key switch is equipped with the mo-
tor, 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.
EMU37290
EC Declaration of Conformity
(DoC)
This outboard motor conforms to certain por-
tions of the European Parliament directive
relating to machinery.
Each conformed outboard motor accompa-
nied with EC DoC.EC DoC contains the fol-
lowing information;
●
Name of Engine Manufacture
● Model name
●
Product code of model (Approved model
code)
● Code of conformed directives
EMU25203
CE Marking
Outboard motors affixed with this “CE”mark-
ing conform with the directives of; 98/37/EC,
94/25/EC - 2003/44/EC and 2004/108/EC.
1. Outboard motor serial number location
1
ZMU02931
1. Key number

General information
5
EMU25213
C-Tick label
Engines affixed with this label conform to
certain portion(s) of the Australian Radio
Communications Act.
1. CE marking location
1. C-Tick label location
1
ZMU04730
ZMU06040
1
ZMU05721
ZMU01697