TOHATSU MFS 5C LPG User manual

MANUAL
OWNER’S
OB No.003-11141-0AG1
MFS 5C
LPG

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 © 2017 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.
California Proposition 65
This engine contains or exhaust chemicals known to the state of California to cause can-
cer, birth defects or other reproductive harm.
WARNING

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 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.
Please always keep this manual together with the outboard motor as a reference to every-
one 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
ENOM00002-0
OWNER REGISTRATION AND IDENTIFICATION
Upon purchasing this product, be sure that the WARRANTY CARD is correctly and com-
pletely 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.

4
ENOM00005-A
Serial Number
In the space below, please record the outboard motor's serial number (indicated both on
the 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:
ENOF01500-1
ENOF01501-0

5
ENOM00007-0
NOTICE: DANGER/WARNING/CAUTION/Note
Before installing, operating or otherwise handling your outboard motor, be sure to thor-
oughly read and understand this Owner's Manual and carefully follow all of the instruc-
tions. 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.
ENOW00001-0
Failure to observe will result in severe personal injury or death, and possibly property dam-
age.
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 outboard
motor or to clarify important points.
DANGER
WARNING
CAUTION

1. GENERAL SAFETY INFORMATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
2. SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
3. PARTS NAME . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
4. LABEL LOCATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
5. INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
1. Mounting the outboard motor on boat . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
2. Remote control device installation (option) . . . . . . . . . . . . . . . . . . . . . . . . 19
3. Battery installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
4. Altitude adjustment kit Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
6. PRE-OPERATING PREPARATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
1. Fuel handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
2. Fuel filling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
3. Engine oil recommendation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
4. Break-In . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
5. Warning system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
7. ENGINE OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Before starting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
1. Fuel feeding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
2. Starting the engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
3. Warming up the engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
4. Forward, reverse, and acceleration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
5. Stopping the engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33
6. Steering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35
7. Trim angle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35
8. Tilt up and down . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
9. Shallow water operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
8. REMOVING AND CARRYING THE OUTBOARD MOTOR. . . . . . . . . . . . . . 39
1. Removing the outboard motor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
2. Carrying the outboard motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
3. Traillering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
9. ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42
1. Steering friction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42
2. Throttle grip friction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
10. INSPECTION AND MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43
1. Daily Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
2. Periodic Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
3. Off-season storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
4. Pre-season check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
5. Submerged outboard motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .60
6. Cold weather precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .60
7. Striking underwater object. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
8. Auxiliary outboard motor operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .61
11. TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
CONTENTS

12. TOOL KIT AND SPARE PARTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
13. PROPELLER TABLE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .65
14. EMISSION CONTROL SYSTEM INFORMATION. . . . . . . . . . . . . . . . . . . . .66

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.TOOL KIT AND SPARE PARTS
13.PROPELLER TABLE
14.EMISSION CONTROL SYSTEM
INFORMATION
INDEX
2
3
4
5
6
7
8
9
10
11
12
13
14
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 MOV-
ING 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 lanyard 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 operator falls over-
board.
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 inch.) stop
switch lanyard is coiled and can extended to a full 1300 mm (51 inch.).
ENOM00800-A
PERSONAL FLOATATION DEVICE
As the operator/driver and passenger of the boat, you are responsible to wear a PFD (Per-
sonal Floatation 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 recommended
lubricants.
ENOM00011-B
MAINTENANCE
As the owner of this outboard motor, you should be acquainted with correct maintenance
procedures following maintenance section of this manual (See page 43). It is the opera-
tor's responsibility to perform all safety checks and to ensure that all lubrication and main-
tenance 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.
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.
Propane
Propane and its vapors are very flammable and can be explosive. Use extreme care when
handling propane. You should be thoroughly knowledgeable on how to correctly handle
propane by reading this manual.

12
2
SPECIFICATIONS
ENOM00810-D
MODEL FEATURE
*1: Option
*2: SP model equip with charging coil as a standard.
ENOM00811-D
MODEL NAME EXAMPLE
F 5 CLPGL
F5C LPG Model F5C LPG F5C LPG SP*2
Type MF MF
Transom heights
Sz
Lz z
UL z
Tiller Handle z z
Remote Control *1 (z) (z)
Mnual tilt z z
F 5 C LPG L
Model descrip-
tion Horse power Product generation Fuel Shaft length
F= Four stroke
D= Two stroke DI -A and up
D=Integral (Dual)
fuel tank
Blank=Separate
fuel tank
LPG=Propane
S= Short 15 in
L= Long 20 in
UL= Ultra long
25 in

SPECIFICATIONS 13
2
EENOM00401-0
*1 With propeller, with battery cable.
*2:Equipped only for SP model, the other models OPTION.
Remark: Specifications subject to change without notice.
Tohatsu outboard is power rated in accordance with ISO8665 (propeller shaft output).
MF
Item MODEL 5C
(Separate Tank) 5C SP
(Separate Tank)
Overall Length mm (in) 783 (30.8)
Overall Width mm (in) 343 (13.5)
Overall Height S·L·UL mm (in)
1039 (40.9)
1166 (45.9)
1293 (50.9)
Transom Height S·L·UL mm (in) 435 (17.1) 562 (22.1) 689 (27.1)
Weight *1
S kg (lb) 27.2 (60.0)
L kg (lb) 27.7 (61.1)
UL kg (lb) – 28.2 (62.2)
Output kW (ps) 5C : 3.68 (5)
Max. Operating Range rpm 5C : 5000–6000
Idle Speed in Forward Gear rpm 1100
Idle Speed in Neutral Gear rpm 1300
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 Ignitor
Spark Plug NGK DCPR6E
Alternator 12V 60W 5A (Max.) *2
Trim Position 6
Engine Oil mL (fl.oz.) API SH, SJ or SL FCW 10W-30/40, Approx. 450 (15.2)
Gear Oil mL (fl.oz.) Genuine Gear Oil or API GL5, SAE #80-90, Approx. 195 (6.6S)
Fuel Propane
Fuel connector CGA 600
Gear Reduction Ratio 2.15 (13 : 28)
Emission Control System EM (Engine modification)
Operator Sound Pressure
(ICOMIA 39/94) dB (A) 81.0
Hand Vibration Level
(ICOMIA 38/94) m/sec2 5.9

14
3
PARTS NAME
ENOM00402-A
5C
1
2
45
6
7
8
910
11
12
13
14
15
16
17
18
19 20
21
22
23
24
25
3
28
27
26
ENOF01502-B
1 Tilt Handle
2 Top Cowl
3 Bottom Cowl
4 Cooling Water Check Port
5 Tilt Lever
6 Steering Adjustment Screw
7 Anode
8 Anti Ventilation Plate
9 Propeller
10 Oil Plug (Lower) (Fill)
11 Water Inlet
12 Oil Plug (Upper) (Level)
13 Thrust Rod
14 Clamp Bracket
15 Clamp Screw
16 Throttle Grip
17 Shift Lever
18 Starter Handle
19 Choke Knob
20 Stop Switch
21 Fuel Connector
22 Warning Lamp
23 Engine Oil Filter Cap
24 Spark Plug
25 Engine Oil Drain Screw
26 Shut Off Valve
27 Regulator
28 Mixer

15
4
LABEL LOCATIONS
ENOM00019-A
Warning label locations
2, 3
1
5
6
4
ENOF01503-B

LABEL LOCATIONS16
4
1. Warning label regarding owner’s man-
ual, top cowl, engine stop switch,
engine oil level and fuel.
2. Warning label regarding oil pressure
(See page 25).
3. Warning label regarding stop switch
(See page 33)
4. Warning regarding high temperature.
5. Warning label regarding position of
outboard motor when setting down.
6-1. Warning regarding high temperature.
6-2. Warning regarding rotating object.
6-3. Warning regarding high voltage
3PG-72180-0
ENOF00131-0
ENOF00131-B
3GR-76191-0
ENOF00006-0
32
1
ENOF00005S1

LABEL LOCATIONS 17
4
ENOM00019-A
EPA Emissions Regulations
Outboards sold by Tohatsu America Cor-
poration in the United States are certified
to the United States Environmental Protec-
tion Agency as conforming to the require-
ments of the regulations for the control of
air pollution from new outboard engines.
This certification is contingent on certain
adjustments being set to factory stan-
dards. For this reason, the factory proce-
dure for servicing the product must be
strictly followed and, wherever practicable,
returned to the original intent of the design.
Maintenance, replacement, or repair of
the emission control devices and sys-
tems may be performed by any marine
engine repair establishment or individ-
ual.
Engines are labeled with an Emission Con-
trol Information decal as permanent evi-
dence of EPA certification.
Emissions Warranty Coverage
WARRANTY INFORMATION
Four Stroke Outboard Limited War-
ranty
Canadian and California residents who
have purchased an outboard motor from a
Canadian and California dealer receive
additional warranty coverage for specific
emissions related components. To fully
understand your warranty coverage please
read our standard warranty statement and
the Emission Warranty Statement provided
by your dealer.
ECI (Emission Control Information) decal locations
1
2
34
5
w
6
7
89
0q
ENOF01504-C
1EMISSION CONTROL INFORMATION
2THIS ENGINE CONFORMS TO
(MODEL YEAR) CALIFORNIA
AND U.S. EPA EMISSION REGULATION
FOR SPARK IGNITION
MARINE ENGINES.
3THIS EQUIPMENT MEETS U.S. EPA
EVAP STANDARDS.
4REFER TO THE OWNER'S MANUAL
FOR MAINTENANCE SPECIFICATIONS
AND ADJUSTMENTS.
5THIS ENGINE IS CERTIFIED TO
OPERATE ON PROPANE.
6DISPLACEMENT
7FAMILY NAME
8MAXIMUM POWER
9OUTPUT
0TRADEMARK & NAME OF
MANUFACTURE
qPART No.
wMODEL YEAR AND MONTH

18
5
INSTALLATION
ENOM00024-B
ENOW00006-0
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.
ENOW00009-0
zMounting the outboard motor without
following this manual can lead to unsafe
conditions such as poor maneuverabil-
ity, lack of control or fire.
zLoose clamp screws and/or mounting
bolts can lead to the release or displace-
ment of the outboard motor, possibly
resulting in lost of control and/or serious
personal injury. Be sure that fasteners
are tightened to the specified torque (30
Nm (3.0 kgf) 13 ft-lb). Check the fasten-
ers for tightness from time to time.
zBe sure to use outboard mounting fas-
teners 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 (3.0 kgf) 13 ft-lb). Test cruise to
check if fasteners are tightened
securely.
zOutboard motor mounting must be per-
formed by trained service person(s)
using lift or hoist with sufficient capacity.
Keep the outboard motor in a vertical posi-
tion when mounting.
ENOM00025-0
Position ... Above keel line
Set engine at center of boat.
1. Center of boat
2. Boat transom
ENOM00026-0
Transom matching
Be sure that the anti ventilation plate of the
outboard motor is 5–25 mm (0.2–1 in)
below the bottom of hull.
If the above condition cannot be met due
to the shape of the bottom of your boat,
please consult your authorized dealer.
1. Mounting the outboard motor on
boat
WARNING
WARNING
ENOF01505-0
2
1
ENOF01141-0

INSTALLATION 19
5
1. Bottom of hull
2. Anti ventilation plate
ENOW00007-0
zBefore 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 cowl-
ing, in high waves, water may enter the
engine cylinders.
zIncorrect outboard motor mounting
height or existence of underwater
object(s), such as hull bottom design,
bottom surface conditions or underwa-
ter accessories, can cause water spray
possibly reaching the engine through an
opening of the bottom cowling during
cruising. Exposing the engine to such
conditions for extended periods can
lead to severe engine damage.
zTighten the bolts sufficiency, otherwise
falling down of outboard could be hap-
pened.
ENOM00830-B
Mounting bolts
Manual tilt type
1. To attach the outboard motor to the
boat, tighten the clamp screws by
turning their handles.
Secure the outboard motor with a rope
to prevent loss overboard.
ENON00002-0
Note
A rope is not included in the standard
accessories.
ENOM00840-0
ENOW00850-0
Remote control box location
1. Shift cable
2. Throttle cable
3. Cable harness B
Install the remote control box in a position
where it is easy to reach and operate the
controls.
Make sure there are no obstacles that can
interfere with the operation of the remote
control cable.
CAUTION
1
2
5−25 mm
(0.2−1 in)
ENOF01506-0
2. Remote control device
installation (option)
ENOF01507A
3
1, 2
ENOF00841-0

INSTALLATION20
5
ENOW00850-0
Remote control cable length
ENOW00100-A
Be careful not to loop the remote control
cables to a diameter of 406 mm (16 inches)
or less. Otherwise, it affects the service life
of the cable.
Measure the distance from the remote
control box to the outboard motor where
the remote control cable should be routed.
Prepare a cable that is 300-450mm (11.8-
17.7in) longer than the measured distance.
Temporarily pull the cable along the
intended cable route to check its length is
sufficient.
Connect the remote control cable to the
engine, then run the cable to the remote
control box, making sure it is not sharply
bent, too taut and free from obstructions
that could interfere with steering.
ENOM00029-A
ENOW00012-0
Battery electrolyte contains sulfuric acid
and thus is hazardous, causing a burn if it
comes in contact with your skin, or poison-
ous if swallowed.
Keep battery and electrolyte away from
reach of children
When handling the battery, be sure to:
zRead all warnings shown on the battery
case
zPrevent electrolyte from coming in con-
tact 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 con-
tact with:
zSkin, flush thoroughly with water.
zEye, flush thoroughly with water, and
then seek immediate medical treatment.
In case battery electrolyte is swallowed:
zSeek immediate medical treatment.
ENOW00013-B
Battery generates explosive hydrogen gas.
Be sure to:
zCharge the battery in a well-ventilated
place.
zPlace the battery away from any source
of fire, sparks and open flames such as
burners or welding equipment.
zDo not charge the battery when the
electrolyte level is low. Otherwise, the
battery will be damaged and may cause
malfunction.
ENOW00014-0
zMake sure that the battery leads do not
get stuck between the outboard motor
and boat when turning, etc.
zThe starter motor may fail to operate if
the leads are incorrectly connected.
zBe sure to correctly connect the (+) and
(—) leads. If not, the charging system
will be damaged.
CAUTION
3. Battery installation
WARNING
ENOF00842-0
WARNING
CAUTION