Yamaha 30D User Manual

OWNER’S MANUAL

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Read this manual carefully before operating this

outboard motor.

30D

6J8-28199-74-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

T

T

EMU25105

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.
To ensure long product life, Yamaha recom­mends that you use the product and perform
the specified periodic inspections and main­tenance by correctly following the instruc­tions in the owner’s manual. Any damage
resulting from neglect of these instructions is
not covered by warranty.
Some countries have laws or regulations re­stricting 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 prod­uct was purchased for further information.
If the product was purchased used, please
consult your closest dealer for customer re­registration, and to be eligible for the speci­fied services.

IP:

The 30DEO, 30DETO, 30DMHO 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.

EMU25121

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

30D

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

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

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

Read manuals and labels................ 6

Warning labels ..................................6

Specifications and requirements... 10

Specifications ................................ 10

Installation requirements ............... 11

Boat horsepower rating................... 11

Mounting motor ............................... 11

Remote control requirements........ 11

Battery requirements..................... 12

Battery specifications ...................... 12

Mounting battery .............................12

Multiple batteries............................. 12

Without a rectifier or Rectifier

Regulator ...................................... 12

Propeller selection......................... 12

Start-in-gear protection ................. 13

Engine oil requirements ................ 13

Fuel requirements......................... 13

Gasoline .......................................... 13

Muddy or acidic water................... 13

Anti-fouling paint ........................... 14

Motor disposal requirements......... 14

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................................ 18

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

Power trim and tilt switch on remote

control ...........................................21

Trim tab with anode......................... 21

Trim rod (tilt pin) .............................. 22

Shallow water lever ......................... 22

Tilt lock mechanism......................... 22

Tilt support knob.............................. 22

Tilt support lever for manual tilt

model ............................................23

Top cowling lock lever(s)

(turn type)...................................... 23

2-pin connector ...............................23

Battery charging information ...........24

Table of contents

Alert indicator .................................. 24

Engine control system.................... 25

Alert system .................................. 25

Overheat alert .................................25

Oil level alert and oil filter clogging

alert............................................... 25

Installation .......................................27

Installation ..................................... 27

Mounting the outboard motor.......... 27

Clamping the outboard motor ......... 28

Operation .........................................30

First-time operation ....................... 30

Breaking in engine ..........................30

Getting to know your boat ............... 30

Checks before starting engine ...... 30

Fuel level......................................... 31

Remove cowling.............................. 31

Fuel system..................................... 31

Controls........................................... 31

Engine shut-off cord (lanyard)......... 32

Oil.................................................... 32

Engine............................................. 32

Operation after long period of

storage.......................................... 32

Install cowling.................................. 33

Power trim and tilt system............... 33

Battery............................................. 34

Filling fuel and engine oil............... 34

Filling fuel for portable tank............. 34

Filling oil for manual starter

model ............................................ 35

Filling oil for electric start models.... 35

Oil level indicator operation............. 37

Operating engine........................... 37

Feeding fuel (portable tank) ............ 37

Starting engine................................ 38

Checks after starting engine ......... 42

Cooling water .................................. 42

Warming up engine ....................... 42

Choke start models ......................... 42

Checks after engine warm-up ....... 42

Shifting ............................................ 42

Stop switches.................................. 42

Shifting .......................................... 42

Stopping boat................................ 44

Stopping engine............................ 44

Procedure........................................ 44

Trimming outboard motor.............. 45

Adjusting trim angle for manual tilt

models ..........................................46

Adjusting trim angle (power tilt

models) .........................................46

Adjusting boat trim ..........................47

Tilting up and down....................... 48

Procedure for tilting up (manual tilt

models) .........................................48

Procedure for tilting up (power trim

and tilt models).............................. 49

Procedure for tilting down (manual

tilt models)..................................... 50

Procedure for tilting down (power

trim and tilt models)....................... 50

Shallow water................................ 51

Cruising in shallow water (manual

tilt models)..................................... 51

Power trim and tilt models............... 52

Cruising in other conditions........... 53

Maintenance .................................... 54

Transporting and storing outboard

motor ........................................... 54

Clamp screw mounting models ....... 54

Storing outboard motor ...................54

Procedure........................................ 55

Lubrication (oil injection models)..... 57

Cleaning the outboard motor........... 57

Checking painted surface of

motor.............................................57

Periodic maintenance ................... 57

Replacement parts .......................... 58

Severe operating conditions............ 58

Maintenance chart 1........................ 59

Maintenance chart 2........................ 61

Greasing.......................................... 62

Cleaning and adjusting spark

plug ...............................................63

Checking fuel filter........................... 64

Inspecting idling speed.................... 64

Checking water in engine oil tank ...65

Checking wiring and connectors .....65

Table of contents

Checking propeller .......................... 65

Removing propeller......................... 66

Installing propeller........................... 66

Changing gear oil............................ 67

Cleaning fuel tank ...........................68

Inspecting and replacing

anode(s)........................................ 69

Checking battery (for electric start

models) ......................................... 69

Connecting the battery.................... 70

Disconnecting the battery ............... 70

Trouble Recovery............................ 72

Troubleshooting ............................ 72

Temporary action in emergency.... 75

Impact damage ...............................75

Replacing fuse ................................75

Power trim and tilt will not

operate.......................................... 76

Starter will not operate .................... 76

Emergency starting engine .............77

Treatment of submerged motor..... 78

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 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 37 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.

EMU33730

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 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 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.

EMU33771

Avoid collisions

Scan constantly

other boats. Be alert for conditions that limit
your visibility or block your vision of others.

Operate defensively

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

member,
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

for people, objects, and

ZMU06025

at safe speeds and

to avoid collisions. Re-

boats do not have brakes

, and

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.

3

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 sto­len.

1. Outboard motor serial number location

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.

1. Key number

EMU37290

EC Declaration of Conformity

(DoC)

This outboard motor conforms to certain por­tions of the European Parliament directive
relating to machinery.
Each conformed outboard motor accompa­nied with EC DoC.EC DoC contains the fol­lowing 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”mark­ing conform with the directives of; 98/37/EC,
94/25/EC - 2003/44/EC and 2004/108/EC.

4

General information

1

1. CE marking location

ZMU06200

ZMU06040

5

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.

30DMHO

2

1

3

ZMU06197

6

30DEO, 30DETO

General information

1

3

2

ZMU06202

7

General information

1

EMU33912

Contents of labels

The above warning labels mean as follows.

1

EWM01691

WARNING

Emergency starting does not have start­in-gear protection. Ensure shift control is
in neutral before starting engine.

2

EWM01681

WARNING

●

Keep hands, hair, and clothing away
from rotating parts while the engine is
running.

●

Do not touch or remove electrical parts
when starting or during operation.

2

3

ZMU05706

3

EWM01671

WARNING

●

Read Owner’s Manuals and labels.

●

Wear an approved personal flotation
device (PFD).

●

Attach engine shut-off cord (lanyard) to
your PFD, arm, or leg so the engine
stops if you accidentally leave the
helm, which could prevent a runaway
boat.

8

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

9

Specifications and requirements

T

EMU31480

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.

EMU2821C

Dimension:

Overall length:

30DEO 662 mm (26.1 in)

30DETO 662 mm (26.1 in)

30DMHO 993 mm (39.1 in)

Overall width:

30DEO 307 mm (12.1 in)

30DETO 307 mm (12.1 in)

30DMHO 360 mm (14.2 in)

Overall height S:

30DEO 1140 mm (44.9 in)

30DMHO 1158 mm (45.6 in)

Overall height L:

30DEO 1261 mm (49.6 in)

30DETO 1261 mm (49.6 in)

30DMHO 1279 mm (50.4 in)

Transom height S:

30DEO 424 mm (16.7 in)

30DMHO 424 mm (16.7 in)

Transom height L:

545 mm (21.5 in)

Weight (AL) S:

30DEO 60.0 kg (132 lb)

30DMHO 60.0 kg (132 lb)

Weight (AL) L:

30DEO 62.0 kg (137 lb)

30DETO 66.0 kg (146 lb)

30DMHO 62.0 kg (137 lb)

Performance:

Full throttle operating range:

4500–5500 r/min

Maximum output:

22.1 kW@5000 r/min
(30 HP@5000 r/min)

Idling speed (in neutral):

30DEO 750 ±50 r/min
30DETO 1050 ±50 r/min
30DMHO 750 ±50 r/min

Engine:

Type:

2-stroke L

Displacement:

496.0 cm

Bore × stroke:

59.5 × 59.5 mm (2.34 × 2.34 in)

Ignition system:

CDI

Spark plug with resistor (NGK):

BR7HS-10

Spark plug gap:

0.9–1.0 mm (0.035–0.039 in)

Control system:

30DEO Remote control
30DETO Remote control
30DMHO Tiller

Starting system:

30DEO Electric
30DETO Electric
30DMHO Manual

Starting carburetion system:

Choke valve

Min. cold cranking amps (CCA/EN):

30DEO 347.0 A
30DETO 347.0 A

Min. rated capacity (20HR/IEC):

30DEO 40.0 Ah
30DETO 40.0 Ah

Alternator output:

30DMHO 80 W

Maximum generator output:

30DEO 6.0 A

3

10

Specifications and requirements

30DETO 6.0 A

Drive unit:

Gear positions:

Forward-neutral-reverse

Gear ratio:

1.85 (24/13)

Trim and tilt system:

30DEO Manual tilt

30DETO Power trim and tilt

30DMHO Manual tilt

Propeller mark:

F

Fuel and oil:

Recommended fuel:

Regular unleaded gasoline

Min. research octane:

90

Fuel tank capacity:

25 L (6.60 US gal, 5.50 Imp.gal)

Recommended engine oil:

YAMALUBE 2-stroke outboard motor

oil

Lubrication:

Oil injection

Engine oil tank capacity:

0.9 L (0.95 US qt, 0.79 Imp.qt)

Recommended gear oil:

Hypoid gear oil SAE#90

Gear oil quantity:

0.200 L (0.211 US qt, 0.176 Imp.qt)

Tightening torque for engine:

Spark plug:

25.0 Nm (2.55 kgf-m, 18.4 ft-lb)

Propeller nut:

35.0 Nm (3.57 kgf-m, 25.8 ft-lb)

Noise and vibration level:

Operator sound pressure level (ICOMIA
39/94 and 40/94):

91.7 dB(A)
Sound power level (ICOMIA 39/94 and
40/94):

98.7 dB(A)

Vibration on tiller handle (ICOMIA 38/94):

Vibration on tiller handle is under 2.5

2

m/s

EMU33553

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, spe­cial 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

27.

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

11

Specifications and requirements

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

EMU25721

Battery specifications

Minimum cold cranking amps (CCA/EN):

30DEO 347.0 A
30DETO 347.0 A

Minimum rated capacity (20HR/IEC):

30DEO 40.0 Ah
30DETO 40.0 Ah

The engine cannot be started if battery volt­age is too low.

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.

EMU34191

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 propel-

12

Specifications and requirements

ler 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 65.

x

-

123

ZMU04605

1. Propeller diameter in inches

2. Propeller pitch in inches

3. Type of propeller (propeller mark)

proved 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.

EMU25651

Engine oil requirements

Recommended engine oil:

YAMALUBE 2-stroke outboard motor
oil

If the recommended engine oil is not avail­able, another 2-stroke engine oil with an
NMMA-certified TC-W3 rating may be used.

EMU36360

Fuel requirements

EMU36801

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.

Recommended gasoline:

Regular unleaded gasoline with a min­imum octane rating of 90 (Research
Octane Number).

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-ap-

ECM01980

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
has been stored in clean containers.

EMU36880

Muddy or acidic water

Yamaha strongly recommends that you have

13

Specifications and requirements

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.

●

Spare parts, such as an extra set of spark
plugs.

Consult your Yamaha dealer for details.

EMU36340

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, pli-

●

ers, wrenches (including metric sizes), and
electrical tape.
Waterproof flashlight with extra batteries.

●

●

An extra engine shut-off cord (lanyard)
with clip.

14

Components

T

EMU2579H

Components diagram

IP:

* May not be exactly as shown; also may not be included as standard equipment on all mod­els.

30DEO, 30DMHO, 30DETO

1

2

3

8

19

7

4
5

6

1. Oil tank filler cap

2. Top cowling

3. Top cowling lock lever(s)

4. Anti-cavitation plate

5. Trim tab (anode)

6. Propeller

7. Cooling water inlet

8. Tilt rod*

9. Manual starter handle*

10. Engine stop button/Engine shut-off switch*

11. Alert indicator*

12. Gear shift lever*

13. Throttle grip*

14. Tilt lock lever*

15. Transom clamp handle*

9

10

22

18

11

12

14
15

17

20

16. Shallow water lever*

17. Rope attachment

18. Choke knob

19. Tilt support knob*

20. Remote control box (side mount type)*

21. Fuel tank

22. Clip*

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

21

16

13

ZMU03758

15

Components

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.

13

1. Fuel joint

2. Fuel gauge

3. Fuel tank cap

4. Air vent screw

EMU25830

42

ZMU03157

Fuel joint

This joint is used to connect the fuel line.

EMU25841

Fuel gauge

This gauge is located on either the fuel tank
cap or on the fuel joint base. It shows the ap­proximate amount of fuel remaining in the
tank.

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.

EMU26181

Remote control box

The remote control lever actuates both the
shifter and the throttle. The electrical switch-

es are mounted on the remote control box.

1. Power trim and tilt switch

2. Remote control lever

3. Neutral interlock trigger

4. Neutral throttle lever

5. Main switch / choke switch

6. Engine shut-off switch

7. Throttle friction adjuster

EMU26190

Remote control lever

Moving the lever forward from the neutral po­sition engages forward gear. Pulling the le­ver back from neutral engages reverse. The
engine will continue to run at idle until the le­ver is moved about 35° (a detent can be felt).
Moving the lever farther opens the throttle,
and the engine will begin to accelerate.

1. Neutral “ ”

2. Forward “ ”

3. Reverse “ ”

16

T

4. Shift

5. Fully closed

6. Throttle

7. Fully open

EMU26201

Neutral interlock trigger

To shift out of neutral, first pull the neutral in­terlock trigger up.

1. Neutral interlock trigger

EMU26211

Neutral throttle lever

To open the throttle without shifting into ei­ther forward or reverse, put the remote con­trol lever in the neutral position and lift the
neutral throttle lever.

IP:

The neutral throttle lever will operate only
when the remote control lever is in neutral.
The remote control lever will operate only
when the neutral throttle lever is in the closed
position.

Components

1. Fully open

2. Fully closed

EMU26221

Choke switch

To activate the choke system, press in the
main switch while the key is turned to the
“” (on) or “ ” (start) position. The
choke system will then supply the rich fuel
mixture required to start the engine. When
the key is released, the choke will switch off
automatically.

EMU25911

Tiller handle

To change direction, move the tiller handle to
the left or right as necessary.

17

Components

ZMU02846

EMU25922

Gear shift lever

Pulling the gear shift lever towards you puts
the engine in forward gear so that the boat
moves ahead. Pushing the lever away from
you puts the engine in reverse gear so that
the boat moves astern.

R

3

N

2

F
1

ZMU03687

1. Forward “ ”

2. Neutral “ ”

3. Reverse “ ”

EMU25941

Throttle grip

The throttle grip is on the tiller handle. Turn
the grip counterclockwise to increase speed
and clockwise to decrease speed.

ZMU02848

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.

1

ZMU02849

1. Throttle indicator

EMU25973

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.

the friction adjuster. If there is too much
resistance, it could be difficult to move
the remote control lever or throttle grip,
which could result in an accident.

WARNING! Do not overtighten

[EWM00032]

18

Components

To decrease resistance, turn the adjuster
counterclockwise.

ZMU03688

When constant speed is desired, tighten the
adjuster to maintain the desired throttle set­ting.

EMU25993

Engine shut-off cord (lanyard) and
clip

The clip must be attached to the engine shut­off switch for the engine to run. The cord
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
cord will pull out the clip, stopping ignition to
the engine. This will prevent the boat from
running away under power.

tach the engine shut-off cord to a secure
place on your clothing, or your arm or leg
while operating. Do not attach the cord to
clothing that could tear loose. Do not
route the cord where it could become en-

WARNING! At-

tangled, preventing it from functioning.
Avoid accidentally pulling the cord 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.

1. Cord

2. Clip

3. Engine shut-off switch

[EWM00122]

2

1

3

ZMU03759

1. Clip

2. Cord

3. Engine shut-off switch

EMU26001

Engine stop button

To open the ignition circuit and stop the en­gine, push this button.

19

Components

ZMU03760

EMU26011

Choke knob for pull type

To supply the engine with the rich fuel mix­ture required to start, pull out this knob.

EMU26090

Main switch

The main switch controls the ignition system;
its operation is described below.

●

“”

(off)

With the main switch in the “ ” (off) posi­tion, the electrical circuits are off, and the key
can be removed.

●

“”

(on)

With the main switch in the “ ” (on) posi­tion, the electrical circuits are on, and the key
cannot be removed.

“”

●

With the main switch in the “ ” (start) po­sition, the starter motor turns to start the en­gine. When the key is released, it returns
automatically to the “ ” (on) position.

(start)

ZMU03761

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.

20

EMU26122

Steering friction adjuster

A friction device provides adjustable resis­tance to the steering mechanism, and can be
set according to operator preference. An ad­justing screw or bolt is located on the swivel
bracket.