TOHATSU MFS 30C User manual

OWNER’S
MANUAL
トーハツ船外機オーナーズマニュアル
MFS C
Original instructions
MFS C
OB No.--AH

ENOM00001-0
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 © 2018 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.

3
YOUR TOHATSU OUTBOARD MOTOR
ENOM00006-A
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 proce-
dures 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 ser-
vice shop or dealer.
All information in this manual is based on the latest product information available at
the time of approval for printing.
Tohatsu Corporation reserves the right to make changes at any time without notice and
without incurring any obligation.
Please always keep this manual together with the outboard motor as a reference to
everyone who uses the outboard motor. If the outboard motor is resold, make sure
the manual is passed on to the next owner.
We hope you will enjoy your outboard motor and wish you good luck in your boating
adventures.
TOHATSU CORPORATION
ENOM00113-0
EC DECLARATION OF CONFORMITY (DoC)
This product conforms to certain portion of the European Parliament directive. DoC
contains the following information;
zName and Address of the manufacturer.
zApplied community directives
zReference standard
zDescription of the product. (Model name and serial number)
zSignature of the responsible person (Name / Title / Date and place of issue).

4
ENOM00002-0
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.
ENOM00003-0
PRE-DELIVERY CHECK
Be sure that the product has been checked by an authorized TOHATSU dealer before
you take delivery.
ENOM00005-A
Serial Number
In the space below, please record the outboard motor's serial number (indicated
both on the swivel bracket and on the cylinder block). The serial number will be
needed when ordering parts, and when making technical or warranty inquiries.
Serial Number:
Serial Number: Date of purchase:
ENOF01100-1
ENOF01101-0

5
ENOM00007-0
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 “DAN-
GER,” “WARNING,” “CAUTION,” and “Note.” Always pay special attention to such
information to ensure safe operation of the outboard motor at all times.
ENOW00001-0
Failure to observe will result in severe personal injury or death, and possibly property damage.
ENOW00002-0
Failure to observe could result in severe personal injury or death, or property damage.
ENOW00003-0
Failure to observe could result in personal injury or property damage.
ENON00001-0
Note
This instruction provides special information to facilitate the use or maintenance of the out-
board motor or to clarify important points.
DANGER
WARNING
CAUTION

1. GENERAL SAFETY INFORMATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
2. SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
3. PARTS NAME . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4. LABEL LOCATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
5. INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
1. Mounting the outboard motor on boat . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
2. Remote control device installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
3. Battery installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
4. TOCS (Tohatsu Onboard Communication System) installation. . . . . . . . . .27
6. PRE-OPERATING PREPARATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
1. Fuel handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
2. Fuel filling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
3. Engine oil recommendation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
4. Break-In . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
5. Warning system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
7. ENGINE OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Before starting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
1. Fuel feeding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
2. Starting the engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
3. Warming up the engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
4. Forward, reverse, and acceleration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
5. Stopping the engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
6. Steering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
7. Trim angle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
8. Tilt up and down . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
9. Shallow water operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
8. REMOVING AND CARRYING THE OUTBOARD MOTOR. . . . . . . . . . . . . . . . . . . 55
1. Removing the outboard motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
2. Carrying the outboard motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
3. Trailering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
9. ADJUSTMENT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
1. Steering friction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
2. Throttle grip friction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
3. Remote control lever friction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
4. Trim tab adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
10. INSPECTION AND MAINTENANCE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
1. Daily Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
2. Periodic Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
3. Off-season storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
4. Pre-season check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
5. Submerged outboard motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
6. Cold weather precautions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
7. Striking underwater object . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
CONTENTS

8. Operation with multiple outboard motors . . . . . . . . . . . . . . . . . . . . . . . . 82
11. TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
12. ACCESSORIES KIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
13. PROPELLER TABLE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86

9
1. GENERAL SAFETY INFORMATION
2. SPECIFICATIONS
3. PARTS NAME
4. LABEL LOCATIONS
5. INSTALLATION
6. PRE-OPERATING PREPARATIONS
7. ENGINE OPERATION
8. REMOVING AND CARRYING THE OUTBOARD
MOTOR
9. ADJUSTMENT
10.INSPECTION AND MAINTENANCE
11. TROUBLESHOOTING
12. ACCESSORIES KIT
13. PROPELLER TABLE
INDEX
2
1
3
4
5
6
7
8
9
10
11
12
13
1
1

10
1
GENERAL SAFETY INFORMATION
ENOM00009-0
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.
ENOW00005-0
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.
ENOM0008-A
EMERGENCY STOP SWITCH
The Emergency Stop Switch will stall the outboard motor when the stop switch lan-
yard is pulled off. This stop switch lanyard has to be attached to the operator of the
outboard motor to minimize or prevent injuries from the propeller in case the opera-
tor falls overboard.
It is operator’s responsibility to use the Emergency Stop Switch Lanyard.
ENOW00004-A
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 in.) stop
switch lanyard is coiled and can extended to a full 1300 mm (51 in.).
ENOM00800-A
PERSONAL FLOATATION DEVICE
As the operator/driver and passenger of the boat, you are responsible to wear a PFD
(Personal Flotation Device) while on the boat.
WARNING
WARNING

GENERAL SAFETY INFORMATION 11
1
ENOM00010-0
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 recom-
mended lubricants.
ENOM00011-A
MAINTENANCE
As the owner of this outboard motor, you should be acquainted with correct mainte-
nance procedures following maintenance section of this manual (See page 60). It is
the operator's responsibility to perform all safety checks and to ensure that all lubri-
cation 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 pre-
scribed intervals.
Correct periodic maintenance and proper care of this outboard motor will reduce
the chance of problems and limit overall operating expenses.
Carbon Monoxide Poisoning Hazard
Exhaust gas contains carbon monoxide, a colorless and odorless gas which can be
fatal if inhaled for any length of time.
Never start or operate the engine indoors or in any space which is not well ventilated.
Gasoline
Gasoline and its vapors are very flammable and can be explosive. Use extreme care
when handling gasoline. You should be thoroughly knowledgeable on how to correctly
handle gasoline by reading this manual.

12
2
SPECIFICATIONS
ENOM00810-A
MODEL FEATURE
*1: Option
ENOM00811-A
MODEL NAME EXAMPLE
F 30C EPTL
Model F25C F30C
Type MF EP EPT MF EP EPT
Transom heights
Szzzzzz
Lzzzzzz
Tiller Handle z z
Multi-function tiller handle (z)*1 (z)*1 (z)*1 (z)*1
Remote Control z z z z
Power Tilt z z
Gas-assisted tilt
Manual tilt z z z z
F30 C E P T L
Model
description Horse power Product generation Starter system Steering system Tilt system Shaft length
F= Four stroke
D= Two stroke DI -A and up E= Electrical
start
M= Manual start
P=Remote control
(Pleasure)
F=Tiller handle
(Fisher)
*Multi-function tiller
handle is available as
an optional part
T= Power
trim&tilt
G= Gas assist
Blank= Manual
tilt
S= Short 15 in
L= Long 20 in
UL= Ultra long
25 in

SPECIFICATIONS 13
2
ENOM00013-0
Remark: Specifications subject to change without notice.
*1 Without propeller, with battery cable.
*2 With Manual Start
Tohatsu outboard is power rated in accordance with ISO8665 (propeller shaft output).
MF, E, EP
Item MODEL
25C/30C
MF
E
(with multi-
function tiller
handle : option)
EP
Overall Length mm (in) 1038 (40.9) 1303 (52.3) 726 (28.6)
Overall Width mm (in) 411 (16.2)
Overall Height S·L mm (in) 1189(46.8) 1337 (52.6)
Transom Height S·L mm (in) 404 (15.9) 552 (21.7)
Weight*1 S kg (lb) 71.5 (158) 77.0 (170) 73 (161)
L kg (lb) 73 (161) 78.5 (173) 74.5 (164)
Output kW (ps) 25C : 18.4 (25) 30C : 22.1 (30)
Max. Operating Range min-1
(rpm) 25C : 5000–6000 30C : 5250–6250
Idle Speed min-1
(rpm) 850 ±30
Engine Type 4-Stroke fuel injection
Number of Cylinder 3
Bore × Stroke mm (in) 61 × 60 (2.40 × 2.36)
Piston Displacement cm3(Cu
in) 526 (32.09)
Exhaust System Through hub exhaust
Cooling System Water cooling
Lubrication System Trochoid pump
Starting System Manual Electric starter motor*2
Ignition System Flywheel Magneto C.D. ignition
Spark Plug NGK DCPR6E
Alternator 12V 120W 15A
Trim Position 6
Engine Oil mL (fl.oz.) API SH, SJ or SL, SAE 10W-30/40 Approx. 1800 (63.3)
Gear Oil mL (fl.oz.) Genuine Gear Oil or API GL5,SAE #80-90, Approx. 360 (12.2)
Fuel Unleaded Regular Gasoline : R+M/2: 87 or higher RON: 91 or higher
Fuel Tank Capacity L (US gal) 25 (6.60)
Gear Reduction Ratio 2.17 (12 : 26)
Emission Control System MFI (Multiport Fuel Injection)
Operator Sound Pressure
(ICOMIA 39/94) dB (A) 80.4
Hand Vibration Level
(ICOMIA 38/94) m/s22.8 —

SPECIFICATIONS14
2
ENOM00015-0
Remark: Specifications subject to change without notice.
*1 Without propeller, with battery cable.
*2 With Manual Start
Tohatsu outboard is power rated in accordance with ISO8665 (propeller shaft output).
ET (with multi-function tiller handle), EPT
Item MODEL
25C/30C
ET
(with multi-function tiller
handle : option)
EPT
Overall Length mm (in) 1303 (52.3) 726 (28.6)
Overall Width mm (in) 411 (16.2)
Overall Height S·L mm (in) 1189 (46.8) 1337 (52.6)
Transom Height S·L mm (in) 404 (15.9) 552 (21.7)
Weight*1 S kg (lb) 85 (187) 81 (179)
L kg (lb) 86.5 (191) 82.5 (182)
Output kW (ps) 25C : 18.4 (25) 30C : 22.1 (30)
Max. Operating Range min-1
(rpm) 25C : 5000–6000 30C : 5250–6250
Idle Speed min-1
(rpm) 850 ±30
Engine Type 4-Stroke fuel injection
Number of Cylinder 3
Bore × Stroke mm (in) 61 × 60 (2.40 × 2.36)
Piston Displacement cm3(Cu
in) 526 (32.09)
Exhaust System Through hub exhaust
Cooling System Water cooling
Lubrication System Trochoid pump
Starting System Electric starter motor*2
Ignition System Flywheel Magneto C.D. ignition
Spark Plug NGK DCPR6E
Alternator 12V 120W 15A
Trim Position 4
Engine Oil mL (fl.oz.) API SH, SJ or SL, SAE 10W-30/40 Approx. 1800 (63.3)
Gear Oil mL (fl.oz.) Genuine Gear Oil or API GL5, SAE #80-90, Approx. 360 (12.2)
Fuel Unleaded Regular Gasoline : R+M/2: 87 or higher RON: 91 or higher
Fuel Tank Capacity L (US gal) 25 (6.60)
Gear Reduction Ratio 2.17 (12 : 26)
Emission Control System MFI (Multiport Fuel Injection)
Operator Sound Pressure
(ICOMIA 39/94) dB (A) 80.4
Hand Vibration Level
(ICOMIA 38/94) m/s22.8 —

15
3
PARTS NAME
ENOM00820-0
MF
1
2
3
4
5
7
910
19
18
17
16
15
14
12
11
25
24
27
26
28
21
23
22
20
6
8
13
ENOF01135-0
1 Tilt Handle
2 Top Cowl
3 Bottom Cowl
4 Cooling Water Check Port
5 Oil Drain Plug
6 Anti-ventilation Plate
7 Trim Tab
8 Sub-water Inlet
9 Propeller
10 Oil Plug (Lower)
11 Cooling Water Inlet
12 Oil Plug (Upper)
13 Splash Plate
14 Anode
15 Clamp Bracket
16 Clamp Screw
17 Tiller Handle
18 Throttle Grip
19 Shift Lever
20 Recoil Starter Handle
21 Oil Filter
22 Fuel Filter
23 Spark Plug
24 Oil Filler Cap
25 Flushing Connector Cap
26 Warning Lamp
27 Stop Switch
28 Stop Switch Lanyard

PARTS NAME16
3
ENOM00020-0
E (with multi-function tiller handle), EP
1
2
3
4
5
7
910
21
16
15
14
12
11
22
18
20
28
17
30
29
27
23
25
24
6
8
13
19
26
ENOF01136-0
1 Tilt Handle
2 Top Cowl
3 Bottom Cowl
4 Cooling Water Check Port
5 Oil Drain Plug
6 Anti-ventilation Plate
7 Trim Tab
8 Sub-water Inlet
9 Propeller
10 Oil Plug (Lower)
11 Cooling Water Inlet
12 Oil Plug (Upper)
13 Splash Plate
14 Anode
15 Clamp Bracket
16 Clamp Screw
17 Stop Switch
18 PT Switch *1
19 Key Switch
20 Shift Lever
21 Throttle Grip
22 Recoil Starter Handle
23 Oil Filter
24 Fuel Filter
25 Spark Plug
26 Oil Filler Cap
27 Flushing Connector Cap
28 Warning Lamp
29 Multi-function Tiller handle
*2
30 Stop Switch Lanyard
*1: Not for use
*2: Option

PARTS NAME 17
3
ENOM00020-0
ET (with multi-function tiller handle), EPT
1
2
3
4
6
8
10 11
22
17
16
15
13
12
23 21
5
29
18
31
30
28
24
26
25
7
9
14
20
19
32
27
ENOF01137-0
1 Tilt Handle
2 Top Cowl
3 Bottom Cowl
4 Cooling Water Check Port
5 PT Switch
6 Oil Drain Plug
7 Anti-ventilation Plate
8 Trim Tab
9 Sub-water Inlet
10 Propeller
11 Oil Plug (Lower)
12 Cooling Water Inlet
13 Oil Plug (Upper)
14 Splash Plate
15 Anode
16 Clamp Bracket
17 Clamp Screw
18 Stop Switch
19 PT Switch
20 Key Switch
21 Shift Lever
22 Throttle Grip
23 Recoil Starter Handle
24 Oil Filter
25 Fuel Filter
26 Spark Plug
27 Oil Filler Cap
28 Flushing Connector Cap
29 Warning Lamp
30 Multi-function Tiller handle *1
31 Stop Switch Lanyard
32 Power Trim & Tilt
*1: Option

PARTS NAME18
3
3
1
2
4
5
6
7
8
10
9
14 13
12
11
ENOF00127-3
ENOM00822-0
Remote control box & Fuel tank
1 Control Lever
2 Neutral lock arm
3 PTT switch
4 Free throttle lever
5 Main switch
6 Stop switch
7 Stop switch lock
8 Stop switch lanyard
9 Fuel gauge
10 Air vent screw
11 Fuel tank cap
12 Fuel connector (Engine side)
13 Primer bulb
14 Fuel connector (Fuel tank
side)

19
4
LABEL LOCATIONS
ENOM00019-A
Warning label locations
12
10
11
9
8
7
6
3
4
5
ENOF01134-3

LABEL LOCATIONS20
4
1. Warning label urge to read the
owner’s manual .
2-1.Warning regarding emergency start-
ing (See page 40).
2-2.Warning regarding high tempera-
ture.
2-3.Warning regarding rotating object.
2-4.Warning regarding high voltage
3. Warning label regarding engine fail-
ure/ malfunction (See page 32).
4. Warning label regarding stop switch
(See page 38,46 and 47)
5. Warning label regarding position of
outboard motor when setting down.
For tiller handle model
6. Warning label regarding stop switch
(See page 38 and page 40)
For RC model
7. Warning label regarding stop switch
lanyard.
8. Warning regarding gasoline.
9. Warning regarding gasoline (See
page 28).
ENOF00120-0
3PA-72181-100
1
23
4
ENOF00130-0
ENOF00131-B
ENOF00006-0
ENOF00005-P
ENOF00005-D
ENOF00005-E
ENOF00005-L