Tohatsu MFS 15C User Manual

OWNER’S

MANUAL

MFS

15C

20C

OB No.003-11090-3

READ THIS MANUAL BEFORE USING THE OUTBOARD MOTOR. FAILURE TO FOLLOW THE

!

INSTRUC TIO NS AND SAFETY PRECA UTI ONS IN THIS MANUAL CAN RESULT IN SERIOUS
INJURY OR DEATH. KEEP THIS MANUAL IN A SAFE LOCATION FOR FUTURE REFERENCE.

Copyright © 2009 Tohatsu Corporation. All rights reserved. No part of this manual may
be reproduced or transmitted in any from or by any means without the express written
permission of Tohatsu Corporation.

YOUR TOHATSU OUTBOARD MOTOR

OWNER REGISTRATION AND IDENTIFICATION

Upon purchasing this product, be sure that the WARRANTY CARD is correctly and
completely filled out and mailed to the addressee noted there on. This WARRANTY
CARD identifies you as the legal owner of the product and serves as your warranty
registration.

TO THE EXTENT PERMITTED BY APPLICABLE LAW, YOUR OUTBOARD MOTOR
WILL NOT BE COVERED BY THE APPLICABLE LIMITED WARRANTY, IF THIS
PROCEDURE IS NOT FOLLOWED.

PRE-DELIVERY CHECK

Be sure that the product has been checked by an authorized TOHATSU dealer
before you take delivery.

Limited Warranty

Please refer to the TOHATSU outboard motor Limited warranty provided to you with
this product, the terms and conditions of which, as amended from time to time, are
incorporated by reference into the manual.

Serial Number

In the space below, please record the outboard motor's serial number (indicated
both on the lower motor cover and on the cylinder block). The serial number will be
needed in the event of theft or to quickly identifying the outboard motor type.

Serial Number :

To You, Our Customer

Thank you for selecting a TOHATSU outboard motor. You are now the proud owner
of an excellent outboard motor that will service you for many years to come.
This manual should be read in its entirety and the inspection and maintenance
procedures described later in this manual should be followed carefully. Should
a problem arise with the outboard motor, please follow the troubleshooting
procedures listed at the end of this manual. If the problem persists, contact an
authorized TOHATSU service shop or dealer.

We hope you will enjoy your outboard motor and wish you good luck in your
boating adventures.

TOHATSU CORPORATION

CONTENTS

GENERAL SAFETY INFORMATION

■

1

SPECIFICATIONS

■

2

NAMES OF PARTS

■

3

INSTALLATION

■

・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・

・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・

・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・

1. Mounting the outboard motor on boat

2. Installing the remote control devices

3. Installing the battery

4

PRE-OPERATING PREPARATIONS

■

1.Gasoline and engine oil

2.Break-in

・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・

3.Engine warning system

4.ESG

5

ENGINE OPERATION

■

Before starting

1.Starting

・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・

・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・

・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・

2.Warming up the engine

3.Forward and reverse

4.Stopping

5.Trim angle

・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・

・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・

・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・

・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・

・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・

・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・

・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・

・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・

6.Tilt up, tilt down and shallow water operation

6

REMOVING AND CARRYING THE OUTBOARD MOTOR

■

1.Removing the outboard motor

2.Carrying the outboard motor

3.Storing the outboard motor

7

TRAILERING

■

8

ADJUSTMENT

■

1.Steering friction

2.Throttle grip

・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・

・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・

・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・

・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・

3.Remoto Control Lever Load

4.Trim Tab Adjustment

9

INSPECTION AND MAINTENANCE

■

1.Daily inspection

2.Periodic inspection

3.Off-season storage

4.Pre-season check

・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・

・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・

・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・
・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・

・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・

5.Motor submerged in water

6.Cold weather precautions

7.Checking after striking underwater object

10

TROUBLESHOOTING

■

11

TOOL KIT AND SPARE PARTS

■

12

OPTIONAL ACCESSORIES

■

13

PROPELLER TABLE

■

・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・

・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・

・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・

・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・

・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・

・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・

・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・

・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・

・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・

・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・

・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・

・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・

・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・

・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・

・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・

・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・

・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・

・・・・・・・・・・・・・・・・・・・

8
10
12
14
14
16
17
19
19
21
22
22
23
23
23
28
29
31
32
34
38
38
38
38
39
40
40
40
40
41
42
43
50
55
56
56
57
57
58
61
62
63

INDEX

7

GENERAL SAFETY INFORMATION

1. SPECIFICATIONS

2. NAMES OF PARTS

3. INSTALLATION

4.PRE-OPERATING PREPARATIONS

5.ENGINE OPERATION

6.REMOVING AND CARRYING THE MOTOR

7.TRAILERING

8.ADJUSTMENT

9.INSPECTION AND MAINTENANCE

1

2

3

4

5

6

7

8

9

10.TROUBLESHOOTING

11.TOOL KIT AND SPARE PARTS

12.OPTIONAL ACCESSORIES

13.PROPELLER TABLE

10

11

12

13

DANGER

CAUTION

WARNING

GENERAL SAFETY INFORMATION

WARNING

NOTICE : DANGER/WARNING/CAUTION/Note

Before installing, operating or otherwise handling your outboard motor, be sure
to thoroughly read and understand this Owner's Manual and carefully follow all of
the instructions. Of particular importance is information preceded by the words
"DANGER," "WARNING," "CAUTION," and "Note." Always pay special attention to
such information to ensure safe operation of the outboard motor at all times.

!

Failure to observe will result in severe personal injury or death, and possibly property damage.

!

Failure to observe could result in severe personal injury or death, or property damage.

!

Failure to observe could result in personal injury or property damage.

Note

This instruction provides special information to facilitate the use or maintenance of the
outboard motor or to clarify important points.

EMERGENCY STOP SWITCH

The Emergency Stop Switch will stall the outboard motor when the stop switch
tether is pulled off. This stop switch tether can be attached to the operator of
the outboard motor to minimize or prevent injuries from the propeller in case the
operator falls overboard.
We highly recommend use of the Emergency Stop Switch tether.

!

Accidental activation of the Emergency Stop Switch (such as the tether being pulled out
in heavy seas) could cause passengers to lose their balance and even fall overboard, or it
could result in loss of power in heavy seas, strong currents, or high winds. Loss of control
while mooring is another potential hazard.
To minimize accidental activation of the Emergency Stop Switch, the 500 mm (20 inch.)
stop switch tether is coiled and can extended to a full 1,300 mm (51 inch.).

SAFE OPERATION OF BOAT

WARNING

As the operator/driver of the boat, you are responsible for the safety of those
aboard and those in other boat around yours, and for following local boating
regulations. You should be thoroughly knowledgeable on how to correctly operate
the boat, outboard motor, and accessories. To learn about the correct operation
and maintenance of the outboard motor, please read through this manual carefully.
It is very difficult for a person standing or floating in the water to take evasive action
should he or she see a power boat heading in his /her direction, even at a slow
speed. Therefore, when your boat is in the immediate vicinity of people in the water,
the outboard motor should be shifted to neutral and shut off.

!

SERIOUS INJURY IS LIKELY IF A PERSON IN THE WATER MAKES CONTACT WITH
A MOVING BOAT, GEAR HOUSING, PROPELLER, OR ANY SOLID DEVICE RIGIDLY
ATTACHED TO A BOAT OR GEAR HOUSING.

SERVICING, REPLACEMENT PARTS & LUBRICANTS

We re comm end t hat o nly an a uthorized serv ice sho p per f orm se rvice or
maintenance on this outboard motor. Be sure to use genuine parts, genuine
lubricants, or recommended lubricants.

MAINTENANCE

As the owner of this outboard motor, you should be acquainted with correct
maintenance procedures. It is the operator's responsibility to perform all safety
checks and to ensure that all lubrication and maintenance instructions are
complied with for safe operation. Please comply with all instructions concerning
lubrication and maintenance. You should take the engine to an authorized dealer
or service shop for periodic inspection at the prescribed intervals.
Correct periodic maintenance and proper care of this outboard motor will reduce
the chance of problems and limit overall operating expenses.

MOUNTING

Outboard motor mounting must be performed by trained service person(s) using
lift or hoist with sufficient capacity.

10

SPECIFICATIONS

MF , EF , EFT

1

2

3

4

5

6

7

8

9

10

11

12

13

14

Item

Overall Length mm (in)

Overall Width mm (in)

Overall Height S·L·UL mm (in)

Transom Height S·L·UL mm (in)

Weight

Output kW (Hp)

Max. Operating Range rpm

Idle Speed in Forward Gear rpm

Idle Speed in Neutrl Gear rpm

Engine Type

Number of Cylinder

Bore × Stroke mm (in)

Piston Displacement mL (Cu in)

Exhaust System

Cooling System

Engine Lubrication

Startring System

Ignition System

Spark Plug

Trim Position

Engine Oil mL (fl.oz.)

Gear Oil mL (fl.oz.)

Fuel Tank Capacity L (US gal)

Gear Reduction Ratio

: with manual

＊

This specifications might change without a previous notice.

※

MODEL

S Kg (lb)

L Kg (lb)

UL Kg (lb)

15C MF
20C MF

1,065 (41.9) · 1,215 (47.8) · 1,342 (52.8)

413 (16.3) · 562 (22.1) · 689 (27.1)

51.5 (114) 55.0 (121) 54.0 (119)

53.0 (117) 56.5 (125) 55.5 (122)

54.5 (120) 58.0 (128) 57.0 (126)

15C : 11.0 (15) 20C : 14.7 (20)

Manual Electric starter motor

Flywheel Magneto C.D. ignition

API SF, SG, SH, SJ, SL or SM

FCW 10W-30, Approx. 1,000 (33.8)

Genuine Gear Oil or API GL5,

SAE #80-90, Approx. 370 (12.5)

15C EF
20C EF

980 (38.6)

365 (14.4)

15C : 5,000-6,000
20C : 5,400-6,100

900

950

4-Stroke

2

61 × 60 (2.40 × 2.36)

351 (21.42)

Through hub exhaust

Water cooling

Trochoid pump

NGK DCPR6E

6

12 (3.17)

2.15 (13 : 28)

15C EFT
20C EFT

*

EP , EPT

SPECIFICATIONS

11

Item

Overall Length mm (in)

Overall Width mm (in)

Overall Height S·L·UL mm (in)

Transom Height S·L·UL mm (in)

Weight

Output kW (Hp)

Max. Operating Range rpm

Idle Speed in Forward Gear rpm

Idle Speed in Neutral Gear rpm

Engine Type

Number of Cylinder

Bore

Stroke mm (in)

×

Piston Displacement mL (Cu in)

Exhaust System

Cooling System

Engine Lubrication

Startring System

Ignition System

Spark Plug

Trim Position

Engine Oil mL (fl.oz.)

Gear Oil mL (fl.oz.)

Fuel Tank Capacity L (US gal)

Gear Reduction Ratio

This specifications might change without a previous notice.

: with manual

＊

※

MODEL

S Kg (lb)

L Kg (lb)

UL Kg (lb)

15C EP
20C EP

640 (25.2)

345 (13.6)

1,065 (41.9) · 1,215 (47.8) · 1,342 (52.8)

413 (16.3) · 562 (22.1) · 689 (27.1)

61.0 (134)

62.5 (138)

64.0 (141) -

15C : 11.0 (15) 20C : 14.7 (20)

15C : 5,000-6,000
20C : 5,400-6,100

900

950

4-Stroke

2

61 × 60 (2.40 × 2.36)

351 (21.42)

Through hub exhaust

Water cooling

Trochoid pump

Electric starter motor

Flywheel Magneto C.D. ignition

NGK DCPR6E

6 5

API SF, SG, SH, SJ, SL or SM

FCW 10W-30/40, Approx. 1,000 (33.8)

Genuine Gear Oil or API GL5,

SAE #80-90, Approx. 370 (12.5)

12 (3.17)

2.15 (13 : 28)

15C EPT
20C EPT

*

1

2

3

4

5

6

7

8

9

10

11

12

13

12

○

○

○

NAMES OF PARTS

MF , EF , EP , EFT , EPT

1

1

2

○

2

3

4

5

6

7

3

○

4

○

5

○

6

○

7

○

8

○

9

○

10

○

11

○

25

○

26

○

18

17

○

16

○

15

○

14

○

13

○

12

○

24

○

19

23

○

20

○

21

○

22

○

8

9

10

11

12

13

14

MF, EF and EFT type only.

＊：

EF and EFT type only.

☆：

①

Tilt Handle

②

Top Cowl

③

Bottom Cowl

④

Cooling Water Check Port

⑤

Power Tilt Switch
(EPT and EFT type only)

⑥

Oil Drain Bolt

⑦

Anti Ventilation Plate

⑧

Anode / Trim Tab

⑨

Sub Water Inlet

⑩

Water Inlet

11

○

Propeller

12

○

Drive Shaft Housing

13

○

Thrust Rod

14

○

Clamp Bracket

15

○

Clamp Screw

16

○

Throttle Grip

＊

17

○

Shift Lever

＊

18

○

Starter Handle

19

○

Stop Switch

20

○

Warning Lamp

21

○

Fuel Connector

22

○

Starter Switch

☆

23

○

Choke Knob

＊

24

○

Water Plug

25

○

Oil Plug (Upper) (Level)

26

○

Oil Plug (Lower) (Fill)

NAME OF PARTS

33

27

○

32

○

28

○

29

○

30

○

31

○

○

34

○

Power Tilt Type

13

1

2

3

4

35

○

40

○

27

○

Primer Bulb

28

○

Fuel Tank Cap

29

○

Air Vent Screw

30

○

Fuel Connector

31

○

Fuel Pick up Elbow

32

○

Fuel Tank

EP and EPT type only

36

○

37

○

38

○

39

○

33

○

Clamp Screw
(EFT type only)

34

○

Power Tilt

EFT type only

35

○

Power Tilt Switch
(EPT type only)

36

○

Remote Control Box

37

○

Main Switch

38

○

Stop Switch

39

○

Cord Assembly

40

○

Engine Stop Switch Cord

5

6

7

8

9

10

11

12

13

14

＊

Bolt (8×85)

Clamp Screw

＊

Nut

＊

Washer

＊

Washer

＊

: Option

WARNING

CAUTION

INSTALLATION

1. Mounting the outboard motor on boat

1

2

3

4

Most boats are rated and certified
in terms of their maximum allowable
horsepower, as shown on the boat’s
certification plate. Do not equip your boat
with an outboard motor that exceeds this
limit. If in doubt, contact your dealer.
Do not operate the outboard motor until it
has been securely mounted on the boat
in accordance with the instructions below.

Position ... Above keel line

Set engine at center of boat.

5

6

7

8

9

10

Transom matching

Be sure that the anti ventilation plate
of the outboard motor is below the
water surface when running with the
throttle wide open.
If the above condition cannot be met
due to the shape of the bottom of your
boat, please consult your authorized
dealer.

11

12

13

14

!

Center of Boat

Boat Transom

Bottom of hull

5-25mm
(0.2-1”)

Anti Ventilation Plate

MF, EF, EP type

To attach the outboard motor to the

①

boat, tighten the clamp screws by
turning their handles.
Al so, tighten th e bolts. Secu re
the outboard motor with a rope to
prevent loss overboard.

Note

A rope is not included in the standard
accessories.

!

Before beginning the running test,

●

check that the boat with maximum
capacity loading floats on the water in
a proper attitude. Check the position
of water surface on the driveshaft
housing. If the water surface is near
the bottom cowling, in high waves,
water may enter the engine cylinders.

Incorrect outboard motor mounting

●

height or existence of underwater
object(s), such as hull bottom
design, bottom surface conditions
or underwater accessories, can
cause water spray possibly reaching
the engine through an opening of
the bottom cowling during cruising.
Exposing engine to such conditions
for extended periods can lead to
severe engine damage.

INSTALLATION

WARNING

15

EFT, EPT type

Power Tilt and Gas Assist type

②

Clamp Screw
(EFT type only)

A

Nut

Bolt

(8×85)

Washer

64

194
152

187
193

Washer

Note

Notes

1. Apply sealing agent such as
silicone sealed between the bolts
and transom board holes before
tightening the bolts.

2. Be sure to tighten mounting bolt
nuts to the specified torque. (30
Nm(3.0kgf)13ft·lb)

1

2

3

!

Mounting the outboard motor without

●

following this manual can lead to
unsafe conditions such as poor
maneuverability, lack of control or fire.

Loose clamp screws and/or mounting

●

bolts can lead to the release or
displacement of the outboard motor,
possibly resulting in lost of control
and/or serious personal injury. Be sure

51

1818

188

275

10

󲰖

12-

1818

11

󲰖

36

that fasteners are tightened to the
specified torque (30 Nm (3.0kgf)13ft·lb).
Check the fasteners for tightness from
time to time.

Be sure to use outboard mounting

●

fasteners included in the outboard
motor package or their equivalents
in terms of size, material, quality and
strength.
Tighten fasteners to the specified
torque (30 Nm (3.0kgf)13ft·lb). Test
cruise to check if fasteners are
tightened securely.

Outboard motor mounting must

●

be performed by trained service
person(s) using lift or hoist with
sufficient capacity.

4

5

6

7

8

9

10

11

It is recommended to install upper
mounting bolts with bolt head at
inside surface of transom. Bolts with
threaded end at inside surface of
transom can cause personal injury.

12

13

1

Lock nut

CAUTION

WARNING

2

3

4

5

INSTALLATION

16

2.

Installing the remote control devices

!

When using other than Tohatsu's genuine
remote control box, DO NOT select the
one without neutral safety switch that
prevents in-gear start.
Use of remote control box without neutral
safety switch can allow start of engine with
gear at other than neutral shift, potentially
leading passengers to falling or causing
passenger to be thrown overboard.

It is recommended that you consult with
your authorized dealer for installation
and adjustment of the remote control
device.

Remote control cable

Fitting of Remote Control Cable to

②

Engine.

Cable joint

Approx. 10mm

(0.39 inch)

Note

Put the control lever in the Neutral
position and the Free Accel lever in
the fully closed position.

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Installation of the Remote Control

■

Cables (Box side) :
Follow the instruction manual
provided with the remote control.

Installation of the Remote Control

■

on your boat :
Follow the instruction manual
provided with the remote control.

Installation of the Remote Control

■

Cable (engine side) and the Cord
Assembly (Wiring Harness) :

Fitt i n g of connecting par t s to

①

cables

Screw the tip of the remote control
cabl e in to th e ca ble jo i n t u p to
approx. 10 mm (0.39 inch), then lock
them with a lock nut. Apply grease to
the hole of the cable joint.

14

Cable
Harness B

Shift Cable

Throttle Cable

Drag Link

!

Be careful not to loop the remote control cables
to a diameter of 406 mm (16 inches) or less.

INSTALLATION

Cable Harness B

WARNING

WARNING

17

Note

Confirm whether the shift of engine
is in gear when shifting the control
lever of the Remote Control to its first
position in Forward or Reverse (about
32˚) and whether the throttle valve
is fully open when shifting the lever
further.
Confirm whether the throttle valve is
fully closed when the control lever is
shifted to the Neutral position.

Connecting the Cord assembly

③

(Wiring Harness)

Connect cable harness B to cable
harness A.
Location of the connectors is near the
recoil starter of starboard side in the
cowl.

(From remote control)

Cable Harness A
(Outboard motor side)

!

Do not disconnect the cord assembly
when the outboard motor is in
operation or you will lose control of the
outboard motor.

3. Installing the battery

P l a c e t h e ba t t er y bo x i n a

①

co nven ient pos itio n awa y from
possi ble water spray. Securely
fasten both the box and the battery
so they do not shake loose.

!

Battery electrolyte contains sulfuric acid
and thus is hazardous, causing a burn
if it comes in contact with your skin, or
poisonous if swallowed.

Keep battery and electrolyte away from
reach of children

When handling the battery, be sure to;

Read all warnings shown on the

●

battery case

Prevent electrolyte from coming in

●

contact with any part of your body.
Contact can cause serious burn or,
if it comes in contact with your eye,
loss of sight. Use safety glasses and
rubber gloves.

In case battery electrolyte comes in
contact with :

Skin, flush thoroughly with water.

●

Eye, flush thoroughly with water,

●

and then seek immediate medical
treatment.

In case battery electrolyte is swallowed :

Seek immediate medical treatment.

●

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CAUTION

INSTALLATION

CAUTION

WARNING

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Note

Minimum recommended battery : 12V,
70AH (800 Marine Cranking Amps
(MCA) or 650 Cold Cranking Amps
(CCA))
Specifications and features of batteries
vary among the manufacturers. Consult
the manufacturer for details.

!

Battery generates explosive hydrogen
gas. Be sure to:

Charge the battery in a well-

●

ventilated place.

Place the battery away from any

●

source of fire, sparks and open
flames such as burners or welding
equipment.

Do not smoke when handling the

●

battery.

Do not smoke near the battery when

●

the battery is charging.

!

Make sure that the battery leads do

●

not get stuck between the outboard
motor and boat when turning, etc.

The starter motor may fail to

●

operate if the leads are incorrectly
connected.

Be sure to correctly connect the (+)

●

and (−) leads. If not, the charging
system will be damaged.

Do not disconnect the battery leads

●

from battery while the engine is
operating, the electrical parts could
be damaged.

Always use a fully charged battery.

●

!

Do not use a battery that is not
recommended. Use of a battery
not recommended can lead to poor
performance of, and /or damage to, the
electrical system.

Connect the positive lead (+) to the

②

positive terminal (+) of the battery,
and then connect t he nega tive
lea d (−). Whe n disconne c t i ng
th e battery al ways remove the
ne g a ti v e le a d (− ) f i rs t . Af t er
connecting the positive terminal
(+), securely place a cap on it to
prevent short circuits.

Battery cord

Battery cord

(red)

(black)

13

14

PRE-OPERATING PREPARATIONS

CAUTION

CAUTION

DANGER

19

!

Consult an authorized dealer for details on
handling gasoline, if necessary.

Gasoline and its vapors are very flammable
and can be explosive.

When carrying a fuel tank containing gasoline:

Close the air vent screw of fuel tank cap, or

●

gasoline vapor will be emitted through the
air vent screw, creating a fire hazard.
Do not smoke.

●

When or before refueling:

Stop the engine, and do not start the

●

engine during refueling.
Do not smoke.

●

Be careful not to overfill fuel tank. Wipe up

●

any spilled gasoline immediately.

When or before cleaning the gasoline
tank:

Dismount fuel tank from the boat.

●

Place the fuel tank away from every source

●

of ignition, such as sparks or open flames.
Do the work outdoors or in a well ventilated

●

area.
Wipe off gasoline well immediately if spilt.

●

After cleaning gasoline tank:

Wipe off gasoline well immediately if spilt.

●

If the fuel tank is disassembled for cleaning,

●

reassemble carefully. Imperfect assembly
may cause a fuel leak, possibly leading to
fire or explosion.
Dispose aged or contaminated gasoline in

●

accordance with local regulations.

1.

Recommended gasoline types

!

Use of low-quality gasoline results in a short
engine life as well as star ting difficulties and
other engine problems.
We recommend use for Fuel stabilizer.

Use of unleaded gasoline

UNITED STATES AND CANADA:

Use a major brand of automotive unleaded
gasoline with a minimum posted octane
rating of 87. Mid-grade automotive gasoline
that contain fuel injector cleaner are preferred
for added internal engine cleanliness. Leaded
gasoline is not recommended.

INTERNATIONAL :

of automotive unleaded gasoline with a
minimum posted octane rating of 91RON.
Automotive gasoline that contain fuel injector
cleaner are preferred for added internal
engin e cle anlines s. Le aded gasoline is
acceptable in areas where unleaded gasoline
is not available.

Use a major brand

Use of alcohol free gasoline

!

Use of gasoline containing alcohol can cause
engine starting and/or operating difficulties,
wear of and damages to engine parts, and
deterioration of chemical par ts, which may
lead to shortening of your outboard motor’s
life.

Note

The adverse effect caused by the alcohol content
is more severe with methanol than with ethanol.

TOHATSU recommend the use of gasoline
if its ethanol content is less than 10% or
methanol content is less than 5%, only in
case alcohol free gasoline is not available.
Th e alcohol comp onen t of the gas oline
absorbs moisture from the air, which may
disturb regular fuel flow in the fuel system,

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WARNING

PRE-OPERATING PREPARATIONS

CAUTION

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and also accelerate rusting of engine parts.
Mixing of the moisture in the engine oil
can also deteriorate the properties of the
lubricant.

If the use of gasoline containing alcohol
is inevitab le, or presence of al c ohol is
susp ected in the gasoline, it is strongly
recommended to add a filter that has water
separating capability, and check the fuel
syste m for leak s and mechani cal p ar ts
fo r corrosion and abnor m al wear more
frequently.
And, in case any of such abnormalit y is
found, discontinue the use of such gasoline
and contact our dealer immediately.
Damages resulting from the use of gasolines
that contain alcohol are not covered under
the limited warranty.
Fuel tank capacity :
25 liters (6.6 U.S. gal)---for 30, 40, 50
Fu e l Tan k : Wh e n usi n g a f i xe d fu el
ta nk in place of genuin e fue l tan k, it is
reco m men d e d to se l ect a on e w i t h a
structure facilitating interior cleaning.

!

Do not fill the fuel tank over capacity. The
rise of gasoline temperature may cause
gasoline to expand which, if overfilled, may
leak through air vent screw when it is open.
Leaking gasoline is a dangerous fire hazard.

2. Recommended engine oil

Use only high quality 4-stroke engine oil to
insure performance and prolonged engine
life.
Us e o i ls tha t ca r r y the API rat i n g of

SF, SG, SH, SJ, SL, or SM. Select the
appropriate viscosity, based on atmospheric
temperature, from the chart below.

20W−40, 20W−50

ENGINE

OIL

-20

-30

-4

-22

You can also use NMMA FC-W certifi ed
4-stroke engine oil below.
10 W-30 : is recomm ende d for use in all
temperature.
25 W -40: ma y be used at tem p eratures
above 4˚C (40˚F).

15W−40, 15W−50

10W−40, 10W−50

10W−30

10

0

-10
14

50

32

Atmospheric temp.

20

86

68

˚F

96

˚C

40

30

!

The engine oil is drained for shipping
from the factory. Be sure to fill the
engine to the proper level before
starting engine. (To properly fill the
engine with oil follow the instructions in
section 9 of this manual)

Note

Use of engine oils that do not meet
these requirements will result in
reduced engine life, and other engine
problems.

14

3. Break-in

DANGER

!

CAUTION

Your new outboard motor and lower
unit require break-in for the moving
c o m p o n e n ts a c c o r d i n g to t h e
conditions described in the following
time table.

PRE-OPERATING PREPARATIONS

Operating the outboard motor without
break-in can shorten service life of the
product.
If any abnormality is experienced
during the break-in;

Discontinue the operation

●

immediately.

Have the dealer check the product

●

and take proper action(s) if
necessary.

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1-10min 10min-2hrs 2-3hrs 3-10hrs After 10hrs

Throttle Position Idle

Speed

Less than 1/2

3,000 rpm max

Note

Proper break-in allows outboard
motor to deliver it full performance for
longer service life.

throttle

Approx.

Less than 3/4

throttle

Full throttle run

allowed for 1 min

every 10 min

3/4 throttle

Approx.

4,000 rpm.

Full throttle run

allowed for 2 min

every 10 min

!

Do not operate the outboard motor
in closed area or area with no forced
ventilation.
Exhaust gas emitted by this outboard
motor contains carbon monoxide that
will cause death if inhaled continuously.
Inhaling the gas initially causes
symptoms such as feeling of sickness,
drowsiness and headache.
During operation of the outboard motor:

Keep peripheral area well ventilated.

●

Always attempt to stay on the

●

windward side of emission.

Full throttle

available

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