Suzuki DF300AP Le manuel du propriétaire

99011-98J20-03B

DF250AP/DF300AP

Part No. 99011-98J20-03B

June, 2012 Eng. Fre.

TK

300 TAKATSUKA, MINAMI, HAMAMATSU, JAPAN

Printed in Japan

Keep with boat at all times.

This owner’s manual contains important

information on safety, operation and

maintenance.

OWNER’S MANUAL

Conserver ce manuel en permanence dans

le bateau. Ce manuel du proprietaire

contient d’importantes informations sur la

securite, le fonctionnement et l’entretien.

MANUEL DU PROPRIÉTAIRE

DF250AP/DF300AP

*99011-98J20-03B*

INDEX

ENGLISH

FRANÇAIS

________

WIRING DIAGRAM

SCHEMA DE CABLAGE

1

ENGLISH

DF250AP

DF300AP

OWNER’S MANUAL

EN

2

IMPORTANT



WARNING/



CAUTION/ NOTICE/

NOTE

Please read this manual and follow its instruc-

tions carefully. To emphasize special informa-

tion, the symbol  and the words WARNING,

CAUTION, NOTICE and NOTE have special

meanings. Pay special attention to the mes-

sages highlighted by these signal words.

NOTE:

Indicates special instructions to make mainte-

nance easier or instructions clearer.

BREAK-IN INFORMATION

FOR YOUR OUTBOARD MOTOR

The first 10 hours are the most important in the

life of your engine. Proper operation during this

break-in period is essential to help ensure max-

imum life and performance.

Refer to the BREAK-IN section of this manual

for specific break-in recommendations.

IMPORTANT NOTICE TO OWNERS

 WARNING

Indicates a potential hazard that could

result in death or serious injury.



CAUTION

Indicates a potential hazard that could

result in minor or moderate injury.

NOTICE

Indicates a potential hazard that could

result in damage to the motor or boat.



WARNING

Failure to take the proper precautions

may increase the risk of death or severe

injury to you and your passengers.

• Prior to first-time use of your outboard

motor, familiarize yourself thoroughly

with the contents of this owner’s man-

ual. Be aware of all outboard motor fea-

tures and all safety and maintenance

requirements.

• Inspect the boat and motor before each

trip. See the INSPECTION BEFORE

BOATING section for important items.

• Become thoroughly familiar with all

operating and handling characteristics

of your boat and motor. Practice at low

and moderate speeds until you are

competent at handling the boat and

motor. Do not attempt to operate at max-

imum performance until you are com-

pletely familiar with all of these

characteristics.

• Carry boating safety and emergency

equipment. This important equipment

includes; flotation aids for each person

(plus one throwable buoyant cushion in

any boat 16 feet or longer), fire extin-

guisher, sound signaling device, visual

distress signals, anchor, bilge pump,

bucket, compass, emergency starter

rope, extra fuel and oil, first aid kit,

flashlight, food and water, mirror, pad-

dles, tool kit, and transistor radio. Be

sure you are carrying the equipment

appropriate for your trip before launch-

ing.

• Never start the engine or let it run

indoors or where there is little or no

ventilation. Exhaust gas contains car-

bon monoxide, a gas that is colorless

and odorless and can cause death or

severe injury.

• Instruct your passengers on how to

operate the boat, how to deal with

emergencies, and how to operate

safety and emergency equipment.

• Do not hold onto the motor cover or

any other parts of your outboard motor

while getting on or off your boat.

• Ensure that everyone wears a life jacket

on board.

• Never operate the boat while under the

influence of alcohol or other drugs.

• Distribute all weight load evenly in the

boat.

• Have all scheduled maintenance per-

formed. Consult your authorized

Suzuki marine dealer as required.

• Do not modify or remove any outboard

motor standard equipment. To do so

may make the motor unsafe to use.

3

NOTE:

Mounting radio transceiver or navigational

equipment antennae too close to the engine

cowling can cause electrical noise interference.

Suzuki recommends that antennae be mounted

at least one meter (40 inches) away from the

engine cowling.

• Learn and obey all applicable naviga-

tion rules.

• Pay attention to all weather forecasts.

Do not set out if weather is unsettled.

• Use extreme caution when purchasing

replacement parts or accessories.

Suzuki strongly recommends that you

use only genuine Suzuki replacement

parts/accessories or their equivalent.

Inappropriate or poor quality replace-

ment parts or accessories can create

unsafe operating conditions.

This manual should be considered a per-

manent part of the outboard motor and

should remain with the outboard motor

when resold or otherwise transferred to a

new owner or operator. Please read this

manual carefully before operating your

new Suzuki and review the manual from

time to time. It contains important infor-

mation on safety, operation, and mainte-

nance.

FOREWORD

The proper care and maintenance that your

outboard motor requires is outlined in this man-

ual. By following these instructions explicitly you

will ensure a long trouble-free operating life for

your outboard motor. This outboard motor also

conforms to the U.S Environmental Protection

Agency emission regulations which apply to

new outboard motors. The proper adjustment of

engine components is necessary for this out-

board motor to comply with the EPA regula-

tions. Therefore, please follow the maintenance

instructions closely to ensure emission compli-

ance. Your Suzuki dealer has experienced tech-

nicians that are trained to provide your outboard

motor with the best possible service with the

right tools and equipment.

All information in this manual is based on the

latest product information available at the time

of publication. Due to improvements or other

changes, there may be discrepancies between

this manual and your outboard motor. Suzuki

reserves the right to make production changes

at any time, without notice and without incurring

any obligation to make the same or similar

changes to an outboard motor previously built

or sold.

4

PLEASE PRESERVE NATURE

Protect and preserve your boating waters and

their land access. Never pollute the water or

land with oil, gas, or other harmful products. For

example, make sure you dispose of used gear

oil properly following a gear oil change. Also

remember not to litter. With a little bit of effort,

our boating waters can be enjoyed for many

years to come.

Suzuki Motor Corporation believes in conserva-

tion and protection of Earth’s natural resources.

To that end, we encourage every outboard

motor owner to recycle, trade in, or properly dis-

pose of, as appropriate, used oil and batteries.

TAKE A BOATING SAFETY CLASS

An educated boater will enjoy boating more and

will be a safer boater. We recommend that you

take a boating safety class.

Classes explaining required and recommended

equipment for small boats and offering training

in good seamanship are conducted by the U.S.

Coast Guard Auxiliary, the U.S. Power Squad-

ron, and many Red Cross chapters. For infor-

mation on classes in your area, call toll-free 1-

800-336-BOAT (2628).

Your state’s department of boating and your

Suzuki Marine dealer can supply you with addi-

tional information on boating safety and regula-

tions, or you can call the U.S. Coast Guard

Boating Safety Hotline toll-free at 1-800-368-

5647.

California Proposition 65 Warning



WARNING

Engine exhaust, some of its constituents

and certain product components contain

or emit chemicals known to the State of

California to cause cancer and birth

defects or other reproductive harm.

TABLE OF CONTENTS

FUEL AND OIL....................................... 6

GASOLINE............................................ 6

ENGINE OIL.......................................... 7

GEAR OIL ............................................. 7

LOCATION OF SAFETY LABELS ..... 8

LOCATION OF PARTS....................... 10

MOTOR INSTALLATION.................. 11

MOTOR INSTALLATION.................... 11

SELECTION OF LOWER UNIT

ROTATION..........................................

11

BATTERY INSTALLATION .............. 12

BATTERY REQUIREMENT ................ 12

BATTERY INSTALLATION ................ 12

SUB BATTERY CABLE...................... 13

DUAL BATTERY CHARGING

SYSTEM (OPTION).............................

14

USE OF ELECTRICAL

ACCESSORIES...................................

14

PROPELLER SELECTION AND

INSTALLATION................................... 14

IDENTIFICATION OF LOWER

UNIT ROTATION AND PROPELLER

TYPE SELECTION..............................

14

PROPELLER SELECTION ................. 16

PROPELLER INSTALLATION ........... 16

ADJUSTMENTS ................................... 17

TRIM ANGLE ADJUSTMENT............. 17

TRIM TAB ADJUSTMENT.................. 18

CONTROL HANDLE

ADJUSTMENT ....................................

19

IDLE SPEED ADJUSTMENT.............. 19

MOTOR COVER FASTENING

ADJUSTMENT ....................................

19

METER (OPTION) ............................... 20

BUTTON FUNCTIONS........................ 20

SCREEN.............................................. 20

LOCK PAGES..................................... 21

CLOCK................................................ 22

ALARM................................................ 22

CAUTION SYSTEM............................. 23

INDICATOR CHECK........................... 23

OVER-REVOLUTION CAUTION

SYSTEM..............................................

23

OIL PRESSURE CAUTION

SYSTEM..............................................

24

OIL TEMPERATURE CAUTION

SYSTEM..............................................

25

COOLING WATER CAUTION

SYSTEM..............................................

26

BATTERY VOLTAGE CAUTION

SYSTEM..............................................

28

5

ELECTRONIC THROTTLE AND

SHIFT CONTROL CAUTION

SYSTEM................................................. 29

CONTROL UNIT COMMUNICATION

CAUTION SYSTEM.............................

29

2ND STATION CAUTION SYSTEM.... 29

THROTTLE SYSTEM CAUTION

SYSTEM..............................................

30

SHIFT CONTROL CAUTION

SYSTEM..............................................

31

DIAGNOSTIC SYSTEM...................... 32

OIL CHANGE REMINDER

SYSTEM................................................. 33

SYSTEM ACTIVATION....................... 33

CANCELLATION ................................ 33

ENGINE STALLING CAUTION

SYSTEM................................................. 34

WATER IN FUEL ALERT SYSTEM. 34

OPERATION OF TILTING

SYSTEMS............................................... 35

POWER TRIM AND TILT.................... 35

TILT LIMITER CAM............................. 35

MANUAL TILTING .............................. 36

TILT LEVER ........................................ 36

INSPECTION BEFORE BOATING... 37

BREAK-IN ............................................. 39

OPERATION ......................................... 40

MAIN SWITCH (OPTION) ................... 40

CONTROL PANEL (OPTION)............. 40

BEFORE ATTEMPTING TO

START THE ENGINE..........................

43

STARTING THE ENGINE ................... 44

SHIFTING AND SPEED CONTROL ... 45

STOPPING THE ENGINE ................... 47

MOORING ........................................... 48

OPERATION IN SHALLOW

WATER................................................

48

OPERATING THE TROLL MODE

(Optional Item) ...................................

48

OPERATION IN SALT WATER .......... 49

OPERATION IN FREEZING

WEATHER...........................................

49

MOTOR REMOVAL AND

TRANSPORTING................................. 50

MOTOR REMOVAL ............................ 50

MOTOR TRANSPORTING.................. 50

TRAILERING........................................ 52

INSPECTION AND

MAINTENANCE................................... 53

NOTICE ............................................... 53

MAINTENANCE SCHEDULE ............. 53

SPARK PLUG ..................................... 55

BREATHER AND FUEL LINE ............ 57

ENGINE OIL........................................ 58

GEAR OIL ........................................... 59

LOW PRESSURE FUEL FILTER........ 61

LUBRICATION.................................... 62

CORROSION PREVENTION .............. 63

BATTERY............................................ 64

ENGINE OIL FILTER .......................... 65

FLUSHING THE WATER

PASSAGES............................................. 65

SUBMERGED MOTOR....................... 67

STORAGE PROCEDURE ................... 68

MOTOR STORAGE............................. 68

BATTERY STORAGE......................... 69

AFTER STORAGE ............................... 70

GENERAL INFORMATION............... 70

WARRANTIES (For U.S.A)................. 70

IDENTIFICATION NUMBER

LOCATION..........................................

70

EMISSION CONTROL

INFORMATION.................................... 71

TROUBLESHOOTING........................ 71

SPECIFICATIONS ............................... 74

FLOWCHART OF OIL CHANGE

REMINDER SYSTEM.......................... 74

6

FUEL AND OIL

GASOLINE

Suzuki highly recommends that you use alco-

hol-free unleaded gasoline whenever possible,

with a minimum pump octane rating of 89

((R+M)/2 method). In some areas, the only

fuels that are available are oxygenated fuels.

Oxygenated fuels which meet the minimum

octane requirement and the requirements

described below may be used in your outboard

motor without jeopardizing the New Outboard

Motor Limited Warranty.

NOTE:

Oxygenated fuels are fuels which contain oxy-

gen-carrying additives such as MTBE or alco-

hol.

Suzuki recommends that you install a water-

separating fuel filter assembly between your

boat’s fuel tank(s) and outboard motor(s). Fuel

filtration systems of this type will help prevent

water that may be present in your boat’s fuel

tank(s) from contaminating your motor’s elec-

tronic fuel injection system. Water contamina-

tion can cause poor engine performance and

can also cause damage to the electronic fuel

injection system components.

Your Authorized Suzuki Marine Dealer can pro-

vide you advice about water-separating fuel fil-

ter systems and installation.

NOTICE

Use of leaded gasoline can cause engine

damage. Use of improper or poor quality

fuel can affect performance and may

damage your motor and fuel system.

Use only unleaded gasoline. Do not use

fuel having lower than the recommended

octane, or fuel that may be stale or con-

taminated by dirt/water etc.

Gasoline Containing MTBE

Unleaded gasoline containing MTBE (Methyl

Tertiary Butyl Ether) may be used in your out-

board motor if the MTBE content is not greater

than 15%. This oxygenated fuel does not con-

tain alcohol.

Gasoline/Ethanol Blends

Blends of unleaded gasoline and ethanol (grain

alcohol), also known as gasohol, may be used

in your outboard motor if the ethanol content is

not greater than 10%.

Gasoline/Methanol Blends

Avoid using blends of unleaded gasoline and

methanol (wood alcohol) whenever possible.

DO NOT USE fuels containing more than 5%

methanol under any circumstances. Fuel sys-

tem damage or outboard motor performance

problems resulting from the use of such fuels

are not the responsibility of Suzuki and may not

be covered under the New Outboard Motor Lim-

ited Warranty.

Fuel containing 5% or less methanol may be

suitable for use in your outboard motor if they

contain cosolvents and corrosion inhibitors.

Fuel Pump Labeling

In some states, pumps that dispense oxygen-

ated fuels are required to be labeled for the type

and percentage of oxygenate, and whether

important additives are present. Such labels

may provide enough information for you to

determine if a particular blend of fuel meets the

requirements listed above. In other states,

pumps may not be clearly labeled as to the con-

tent or type of oxygenate and additives. If you

are not sure that the fuel you intend to use

meets these requirements, check with the ser-

vice station operator or the fuel suppliers.

NOTE:

• Be sure that any oxygenated fuel blend you

use has octane ratings of at least 89 pump

octane ((R+M)/2 method).

• If you are not satisfied with the driveability or

fuel economy of your outboard motor when

you are using a gasoline/alcohol blend, you

should switch back to unleaded gasoline con-

taining no alcohol.

7

• If engine pinging is experienced, substitute

another brand, as there are differences

between brands.

• Unleaded gasoline will extend spark plug life.

 WARNING

Gasoline is extremely flammable and

toxic. It can cause a fire and can be haz-

ardous to people and pets.

Always take the following precautions

when refueling:

• Never permit anyone other than an

adult to refill the fuel tank.

• If you use a portable fuel tank, always

stop the motor and remove the fuel

tank from the boat to refill it.

• Do not fill the fuel tank all the way to

the top or fuel may overflow when it

expands due to heating by the sun.

• Be careful not to spill fuel. If you do,

wipe it up immediately.

• Do not smoke, and keep away from

open flames and sparks.

NOTICE

Gasoline kept in the fuel tank for long

periods of time will produce varnish and

gum, which can damage the engine.

Always use fresh gasoline.

NOTICE

Fuels containing alcohol can cause paint

damage, which is not covered under the

New Outboard Motor Limited Warranty.

Be careful not to spill fuel containing

alcohol while refueling. If fuel is spilled,

wipe it up immediately.

ENGINE OIL

Oil quality is a major contributor to your

engine’s performance and life. Always select

good quality engine oil.

Suzuki recommends the use of SAE 10W-40

SUZUKI MARINE 4-CYCLE ENGINE OIL. If

SUZUKI MARINE 4-CYCLE ENGINE OIL is not

available, select a NMMA certified FC-W oil or

good quality 4-cycle motor oil from the following

chart according to the average temperatures in

your area.

NOTE:

In very cold weather (below 5°C (41°F), use

SAE (or NMMA FC-W) 5W-30 for easier start-

ing and smooth operation.

GEAR OIL

Suzuki recommends the use of SUZUKI

HYPOID GEAR OIL. If it is not available, use

SAE 90 hypoid gear oil which is rated GL-5

under the API classification system.

NOTICE

Use of poor quality engine oil can

adversely affect engine performance and

life.

Suzuki recommends that you use Suzuki

Marine 4-Cycle Engine Oil or its equiva-

lent.

–20 –10 0 10 20 30

–4 14 32 50 68 86

40

104

TEMP.

API Classification

SAE Viscosity Grade

10W–40

10W–30

˚F

˚C

SG

SH

SJ

SL

SM

8

LOCATION OF SAFETY LABELS

Read and follow all of the labels on your out-

board motor or fuel tank. Make sure you under-

stand all of the labels.

Keep the labels on your outboard motor or fuel

tank. Do not remove them for any reason.

WARNING

AVERTISSEMENT

8

• Fuel can leak creating a fire hazard if

you lay motor on its side. Drain fuel

completely from vapor separator or

carburetor before laying motor on its side.

• See owner’s manual for details.

• Le carburant risque de fuir et de

présenter un danger d’incendie si le

moteur est placé sur le côté.

Vidanger entièrement le carburant du

séparateur de vapeurs ou du

carburateur avant de procéder.

• Pour plus de détail, voir le manuel

du propriétaire.

9

10

LOCATION OF PARTS

Engine oil drain plug

Flush plug

Clamp bracket

Anode

Water intake hole

Power trim and tilt

(P.T.T.) switch

Pilot water hole

(Reverse side)

Anti-cavitation

plate

Trim tab

Motor cover

Water intake hole

Gear oil level plug

Gear oil drain plug

REMOTE CONTROL BOX (Option)

2 inch METER

(Option)

4 inch METER

(Option)

PRIMING BULB

Power trim and tilt (P.T.T.) switch

Remote control handle

Shift lock button

Type BType A

11

MOTOR INSTALLATION

NOTE:

It is against federal regulations for any marine

dealer to service a motor that exceeds the rec-

ommended maximum horsepower for your

boat.

Suzuki strongly recommends that you have

your outboard motor, controls and gauges

installed by your authorized Suzuki Marine

Dealer. He has the tools, the facilities and the

know-how.

 WARNING

Overpowering your boat can be hazard-

ous. Excessive horsepower will have an

adverse effect on hull safety and may

cause operating/handling difficulties. The

boat may also sustain stress and hull

damage.

Never install an outboard motor with

horsepower exceeding the manufac-

turer’s recommended maximum horse-

power listed on the boat’s “Certification

Plate”. Contact your authorized Suzuki

marine dealer if you are unable to locate

the hull “Certificate Plate”.

 WARNING

Failure to have your outboard motor and

associated controls and gauges properly

installed can result in personal injury or

damage.

Suzuki strongly recommends that you

have your outboard motor, controls and

gauges installed by your authorized

Suzuki marine dealer. He has the tools,

the facilities, and the know-how to do the

job correctly.

SELECTION OF LOWER UNIT ROTATION

Lower unit of this product can be used for both

regular rotation or counter rotation without

changing itself.

The motor will be shipped as regular rotation

specification from the factory.

To change the rotation from regular rotation to

counter, the rotation select connector located

near the low pressure fuel pump should be

changed from the original one to the optional

counter select one.

To return it to regular rotation, use the original

connector again.

Please contact your authorized Suzuki Marine

Dealer for details.

NOTE:

The selection of lower unit rotation closely

relates to the selection of the propeller type.

Confirm the lower unit rotation of the motor

before installing the propeller.

For propeller type selection, refer to the section

of “IDENTIFICATION OF LOWER UNIT ROTA-

TION AND PROPELLER TYPE SELECTION”.

Regular select connector

Counter select connector

12

NOTE:

Turn the main switch OFF before connecting or

disconnecting the rotation select connector.

BATTERY INSTALLATION

BATTERY REQUIREMENT

Choose a 12 Volt cranking-type lead acid bat-

tery that meets the specifications shown below.

1000 Marine Cranking Amps (MCA)/ABYC,

or 800 Cold Cranking Amps (CCA)/SAE

or 180 Reserve Capacity (RC) Minutes/SAE

NOTE:

• The specifications listed above are the mini-

mum battery rating requirements for starting

the engine.

• If your boat application requires additional

battery loads, it is recommended that an aux-

iliary battery or batteries be installed. Consult

your Suzuki dealer for proper battery installa-

tion information.

• Dual-purpose (Cranking/Deep-cycle) batter-

ies can be used if they meet the minimum

specifications listed above (MCA, CCA, or

RC).

• Do not use a Deep Cycle battery for the main

cranking battery.

• The use of Maintenance-Free, sealed, or Gel-

Cell batteries is not recommended because

they may not be compatible with Suzuki’s

charging system.

• When connecting batteries in parallel, they

must be of the same type, capacity, manufac-

turer, and of similar age. When replacement

is necessary, they should be replaced as a

set. Consult your Suzuki dealer for proper

battery installation information.

BATTERY INSTALLATION

Secure the battery in a dry area of the boat,

away from vibration.

NOTE:

• It is recommended that the battery be

installed in an enclosed battery case.

• When connecting batteries, hexagon-nuts

must be used to secure battery leads to bat-

tery posts.

To hook up the battery, first connect the red

lead from the motor to the positive battery ter-

minal, then connect the black lead to the nega-

tive battery terminal.

Red lead

Black

lead

Sub battery

cable

Hexagon-nut

13

To remove the battery, first disconnect the black

lead from the negative terminal, then discon-

nect the red lead from the positive terminal.

Connecting and disconnecting the battery as

described above will help minimize the chance

of creating an accidental short circuit and

sparks.

 WARNING

If you place the battery near the fuel tank,

a spark from the battery may ignite the

gasoline, causing a fire and/or an explo-

sion.

Do not place the fuel tank in the same

compartment/area as the battery.

 WARNING

Batteries produce flammable hydrogen

gas and may explode if they are near

flames or sparks.

Never smoke or cause sparks when work-

ing near the battery. Keep the battery

away from open flames. To avoid creating

a spark when charging the battery, con-

nect the battery charger cables to the

proper terminals before turning the

charger on.

 WARNING

Battery acid is poisonous and corrosive.

It can cause severe injury and can dam-

age painted surfaces.

Avoid contact with eyes, skin, clothing,

and painted surfaces. If battery acid

comes in contact with any of these, flush

immediately with large amounts of water.

If acid contacts the eyes or skin, get

immediate medical attention.

SUB BATTERY CABLE

The sub battery cable 1 is used to supply volt-

age to the engine control system. In the midst

of the cable, a 30 A fuse 2 is provided to pro-

tect the control circuit.

If the sub battery cable is not correctly con-

nected to the battery, engine cannot be started.

NOTICE

The electrical system or its components

may be damaged if proper battery pre-

cautions are not followed.

• Be sure to attach battery leads cor-

rectly.

• Do not disconnect battery leads from

the battery while the engine is running.

14

DUAL BATTERY CHARGING SYSTEM

(OPTION)

If installing the battery isolator lead assembly,

available as optional parts, and changing the

position of 40 A fuse from standard to option,

dual battery charging system will be effective.

Be sure to check if the optional 40 A fuse in

OPT position is blown, when the second battery

for accessories will not be charged.

Please ask your authorized Suzuki Marine

Dealer for installation of the isolator lead

assembly.

USE OF ELECTRICAL ACCESSORIES

The amount of power (12V DC) available for

accessories depends on the operating condi-

tion of the motor. For getting a detailed informa-

tion, please inquire of your authorized Suzuki

Marine Dealer.

NOTE:

Use of too much power for electrical accesso-

ries under certain operating conditions can

cause the battery to discharge.

PROPELLER SELECTION

AND INSTALLATION

IDENTIFICATION OF LOWER UNIT ROTA-

TION AND PROPELLER TYPE SELECTION

The lower unit rotation of this product can be

chosen between regular rotation and counter

rotation.

When shift into forward gear, the propeller shaft

of regular rotation lower unit rotates clockwise,

while the counter rotation lower unit rotates

counterclockwise as viewed from behind.

Before installing the propeller, confirm the lower

unit rotation type.

It is necessary to match the installed propeller

type to the lower unit type.

Install a right hand rotation propeller with

regular rotation lower unit, or left hand rota-

tion propeller with counter rotation lower

unit.

Please contact your authorized Suzuki Marine

Dealer for more detail.

 WARNING

If a right hand rotation propeller is

installed on a counter rotation lower unit,

or a left hand rotation propeller on a regu-

lar rotation lower unit, the boat could go

in the opposite direction expected, which

could lead to an accident.

Do not use a right hand rotation propeller

with a counter rotation lower unit or a left

hand rotation propeller with a regular

rotation lower unit.

15

To identify the lower unit rotation type:

1. Remove the motor cover.

2. Confirm the rotation select connector

located near the low pressure fuel pump as

shown in figure.

In regular rotation lower unit and counter

rotation lower unit, rotation select connector

differ from the other as follow:

• For Regular rotation lower unit:

A blue rotation select connector 2 will be

found and there is a label “REGULAR” 1

on the connector.

• For Counter rotation lower unit:

A green rotation select connector 4 will

be found and there is a label “COUNTER”

3 on the connector.

Regular rotation lower unit

Counter rotation lower unit

3. The propeller type suitable for the lower unit

type should be selected and installed.

NOTE:

• Right hand rotation propellers are identified

with the letter “R” after the propeller size indi-

cation on the propeller.

• Left hand rotation propellers are identified

with the letter “L” after the propeller size indi-

cation on the propeller.

Right hand propeller:

3

× 16 ×  × R

Left hand propeller:

3

× 16 ×  × L

16

PROPELLER SELECTION

It is essential to use a propeller on your out-

board motor that is properly matched to your

boat’s operating characteristics. The speed of

the engine when you operate your boat at full

throttle depends on the propeller you use.

Excessive engine speed can seriously damage

the motor, while low engine speed at full throttle

will adversely affect the performance. Your

operating load will also affect propeller selec-

tion. Smaller loads generally require larger-

pitch propellers; larger loads generally require

smaller-pitch propellers. Your authorized Suzuki

Marine Dealer will assist you in selecting a suit-

able propeller for your boat.

You can determine if your propeller is appropri-

ate for use with your boat by using a tachome-

ter to measure engine speed when operating

your boat at full throttle, under minimum load

conditions. If you are using an appropriate pro-

peller, the engine speed will be within the fol-

lowing range:

If the engine speed is not within this range, con-

sult your authorized Suzuki Marine Dealer to

determine which propeller size is best for you.

If you change propellers, be sure to perform the

above check again, to confirm that the engine

speed under full throttle is within the specified

range.

NOTICE

Installing a propeller with either too much

or too little pitch will cause incorrect

maximum engine speed, which may

result in severe damage to the motor.

Ask your authorized Suzuki marine

dealer to assist you in selecting a suit-

able propeller for your boat.

DF250AP

5500 – 6100

r/min. (min

–1

)

DF300AP

5700 – 6300

r/min. (min

–1

)

PROPELLER INSTALLATION

To install a propeller on your outboard motor,

use the following procedure:

1. Coat the propeller shaft splines 1 liberally

with Suzuki water resistant grease to help

prevent corrosion.

2. Place the stopper 2 on the shaft.

3. Align the propeller 3 with the propeller shaft

splines and slide the propeller onto the shaft.

4. Place the spacer 4 and washer 5 on the

shaft.

5. Install the propeller nut 6 and tighten it with

a torque wrench to 50 – 60 N·m (5.0 – 6.0

kg-m/36.0 – 43.5 lb-ft).

6. Align the grooves in the propeller nut with

the hole in the shaft, then insert the cotter

pin 7 and bend the pin ends over to lock it in

place.

To remove the propeller, reverse the above pro-

cedure.

 WARNING

Failure to take proper precautions when

installing or removing the propeller can

result in severe personal injury.

When installing or removing the propeller:

• Always shift into “Neutral” and remove

the emergency stop switch lock plate

so that the motor cannot be started

accidentally.

• Wear gloves to protect hands, and

“lock” the propeller by placing a block

of wood between the blades and the

anti-cavitation plate.

17

ADJUSTMENTS

TRIM ANGLE ADJUSTMENT

To help maintain steering stability and good

performance, always maintain the proper trim

angle as shown in the illustration. The appropri-

ate trim angle varies depending on the combi-

nation of the boat, engine, and propeller, as well

as operating conditions.

Make a test run in the boat to determine if the

trim angle needs to be adjusted. Adjust the trim

angle using the Power Trim and Tilt system.

Refer to the POWER TRIM AND TILT section.

If you still cannot achieve good performance,

there may be a problem with engine mounting

height. Consult your dealer for assistance.

• Trim angle too small (Boat tends to “plow”)

•

Trim angle too large (Boat tends to “porpoise”)

• Proper trim angle

 WARNING

Trim angle greatly affects steering stabil-

ity. If the trim angle is too small, the boat

may “plow” or “bow steer”. If the trim

angle is too large, the boat may “chine

walk” from side to side or “porpoise” up

and down. These conditions, which result

in loss of steering control, can cause

occupants to be thrown overboard.

Always maintain proper trim angle based

on the combination of your boat, engine,

and propeller, as well as operating condi-

tions.

 WARNING

When the motor is tilted beyond the maxi-

mum trim position, the swivel bracket will

not have side support from the clamp

bracket and the tilt system will be unable

to cushion the engine if the lower unit

strikes an obstruction. This could lead to

occupant injury.

Do not operate the engine above 1500 r/

min or operate the boat in a planing atti-

tude with the motor tilted beyond the

maximum trim position.

Trim range

Tilt range

18

TRIM TAB ADJUSTMENT

This adjustment is used to compensate for the

possible tendency of your boat to veer slightly

to port or starboard. This tendency could be

due to such things as propeller torque, motor

mounting position, etc.

To adjust the trim tab:

1. Loosen the bolt A that holds the trim tab in

place.

NOTICE

If you operate the boat with the motor

trimmed beyond the maximum trim posi-

tion, the water intake holes may be above

the water line, causing severe engine

damage due to overheating.

Never operate the boat with the motor

trimmed beyond the maximum trim posi-

tion.

2. If the boat tends to veer to port, move the

rear end of the trim tab toward the port side.

If the boat tends to veer to starboard, move

the rear end of the trim tab toward the star-

board side.

3. Tighten the bolt that holds the trim tab in

place.

After adjusting the trim tab, check to see if the

boat still tends to veer to one side. If necessary,

readjust the trim tab.

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