TOHATSU MFS 6C User manual

4C
5C
6C
MFS
OB No.003-11059-9
MANUAL
OWNER’S
003-11059-9 1107NB
Printed in Japan
TOHATSU CORPORATION
Address : 5-4, 3-chome, Azusawa, Itabashi-ku,
TOKYO, 174-0051 JAPAN
Phone : TOKYO [phone]
FAX : TOKYO [phone]
URL : www.tohatsu.co.jp
4C
5C
6C
MFS
OWNER’S MANUAL

READ THIS MANUAL BEFORE USING THE OUTBOARD MOTOR. FAILURE TO FOLLOW THE
INSTRUCTIONS AND SAFETY PRECAUTIONS IN THIS MANUAL CAN RESULT IN SERIOUS
INJURY OR DEATH. KEEP THIS MANUAL IN A SAFE LOCATION FOR FUTURE REFERENCE.
!
Copyright © 2009-2011 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
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GENERAL SAFETY INFORMATION 8
SPECIFICATIONS 10
NAMES OF PARTS 11
LOCATIONS OF WARNING LABELS 12
INSTALLATION 13
1. Mounting the outboard motor on boat 13
2. Installing the remote control devices

14
PRE-OPERATING PREPARATIONS 15
1. Recommended gasoline types

15
2. Low permeation fuel hose requirement

16
EQUIPPED FOR UNITED STATES AND CANADA MODEL
3. EPA pressurized fuel tank requirements 16
EQUIPPED FOR UNITED STATES AND CANADA MODEL
4.
Fuel demand valve (FDV) requirement

17
EQUIPPED FOR UNITED STATES AND CANADA MODEL
5. Recommended engine oil 18
6. Break-in 19
7. Engine oil warning lamp 20
8. ESG (A device preventing over revolution)

20
ENGINE OPERATION  21
Before starting  21
1. Filling the fuel 21
2. Feeding the fuel 24
3. Starting  25
4. Warming up the engine 27
5. Forward and reverse 28
6. Stopping  29
7. Trim angle  30
8. Tilt up, tilt down and shallow water operation 31
9. Shallow water operation 32
REMOVING AND CARRYING THE OUTBOARD MOTOR 34
1. Removing the outboard motor 34
2. Carrying the outboard motor 34
3. Storing the outboard motor  34
TRAILERING 35
ADJUSTMENT 36
1. Steering friction  36
2. Throttle grip 36
INSPECTION AND MAINTENANCE 37
1. Daily inspection  38

11
12
13
14
2. Periodic inspection 43
3. Off-season storage  47
4. Pre-season check  48
5. Motor submerged in water 49
6. Cold weather precautions 49
7. Checking after striking underwater object

49
TROUBLESHOOTING 50
TOOL KIT AND SPARE PARTS 52
OPTIONAL ACCESSORIES 53
PROPELLER TABLE  54

INDEX
14
12
11
10
9
8
7
6
5
4
3
2
1
7
1. SPECIFICATIONS
2. NAMES OF PARTS
3. LOCATIONS OF WARNING LABELS
4. INSTALLATION
5.PRE-OPERATING PREPARATIONS
6.ENGINE OPERATION
7.
REMOVING AND CARRYING THE OUTBOARD MOTOR
8.TRAILERING
9.ADJUSTMENT
10.INSPECTION AND MAINTENANCE
11.TROUBLESHOOTING
12.TOOL KIT AND SPARE PARTS
13.OPTIONAL ACCESSORIES
14.PROPELLER TABLE
GENERAL SAFETY INFORMATION
13

8GENERAL SAFETY INFORMATION
GENERAL SAFETY INFORMATION
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.
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.
Failure to observe will result in severe personal injury or death, and possibly property damage.
!
DANGER
Note
This instruction provides special information to facilitate the use or maintenance of the
outboard motor or to clarify important points.
Failure to observe could result in personal injury or property damage.
!
CAUTION
!
WARNING
Failure to observe could result in severe personal injury or death, or property damage.
!
WARNING
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.).

9
GENERAL SAFETY INFORMATION
SAFE OPERATION OF BOAT
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.
SERVICING, REPLACEMENT PARTS & LUBRICANTS
We recommend that only an authorized service shop perform service 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.
!
WARNING
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.

10 SPECIFICATIONS
1
MODEL
Item
4C(D) 5C(D) M6C(D)
(Dual Tank)
5C(S) 6C(S)
(Separate Tank)
Overall Length mm (in) 519 (20.4)
Overall Width mm (in) 323 (12.7)
Overall Height S·L·UL
mm (in)
Except for USA and Canada model
1,053 (41.5) · 1,180 (46.5) ·
1,307 (51.5) 1,039 (40.9) · 1,166 (45.9) ·
1,293 (50.9)
For USA and Canada model
1,067 (42.0) · 1,194 (47.0) ·
1,321 (52.0)
Transom Height S·L·UL mm (in) 435 (17.1) · 562 (22.1) · 689 (27.1)
Weight
S Kg (lb) 26.1 (57.5) 25.6 (56.4)
L Kg (lb) 26.6 (58.6) 26.1 (57.5)
UL Kg (lb) 27.1 (59.8) 26.6 (58.6)
Output kW (Hp) 4C : 2.9 (4) 5C : 3.7 (5) 6C : 4.4 (6)
Max. Operating Range rpm 4C & 5C : 4,500 - 5,500 6C :5,000 - 6,000
Idle Speed in Forward Gear rpm 1,100
Idle Speed in Neutral Gear rpm 1,300
Engine Type 4-Stroke
Number of Cylinder 1
Bore × Stroke mm (in) 59 × 45 (2.32 × 1.77)
Piston Displacement mL (Cu in) 123 (7.5)
Exhaust System Through hub exhaust
Cooling System Water cooling
Engine Lubrication Trochoid pump
Startring System Manual Starter
Ignition System Flywheel Magneto C.D. ignition
Spark Plug NGK DCPR6E
Trim Position 6
Engine Oil API SF, SG, SH or SJ
FCW 10W-30/40, Approx. 450 (15.2)
Gear Oil Genuine Gear Oil or API GL5,
SAE #80-90, Approx. 195mL
Fuel Unleaded regular gasoline : Pump posted 87 Octane
(research octane rating of 91)
Fuel Tank Capacity L (US gal) ＊1.15 (0.30) Integral 12 (3.17) Separate
Gear Reduction Ratio 2.15 (13 : 28)
Emission Control System Engine modification (EM)
Operator Sound Pressure
(ICOMIA 39/94) dB(A) 81.6
Hand Vibration Level
(ICOMIA 38/94) m/sec2 7.2
＊
In case of dual fuel tank system, use it together with 12L separate tank.
SPECIFICATIONS
MF