TOHATSU M 2.5A2 User manual

MANUAL
OWNER’S
OB No.003-11045-6
M 2.5A2
3.5A2
3.5B

Copyright © 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.
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.
!

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 swivel bracket 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

GENERAL SAFETY INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
1 SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2 NAMES OF PARTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3 INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
1. Mounting the outboard motor on boat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4 PRE-OPERATING PREPARATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
1. Recommended gasoline types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
2. Recommended engine oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
3. Break-in . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
5 ENGINE OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
1. Starting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
2. Warming up the engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
3. Forward and reverse . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
4. Stopping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
5. Trim angle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
6. Tilt up and tilt down . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
7. Outboard motor position in tilt up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
8. Mooring the boat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
6 REMOVING AND CARRYING THE OUTBOARD MOTOR . . . . . . . . . . . . . . . . 30
1. Removing the outboard motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
2. Carrying the outboard motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
3. Storing the outboard motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
7 TRAILERING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
8 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
1. Steering friction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
9 INSPECTION AND MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
1. Daily inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
2. Periodic inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
3. Off-season storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
4. Pre-season check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
5. Motor submerged in water . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
6. Cold weather precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
7. Checking after striking underwater object . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
10 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
11 TOOL KIT AND SPARE PARTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
12 OPTIONAL ACCESSORIES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
13 PROPELLER TABLE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
CONTENTS

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

8
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.
!
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.
!
!
Failure to observe could result in severe personal injury or death, or property damage.
GENERAL SAFETY INFORMATION
!
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
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.
!
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
1
SPECIFICATIONS
2.5A2, 3.5A2, 3.5B2
MODEL
Item 2.5A2 3.5A2 3.5B2
Overall Length mm (in) 550 (21.7)
Overall Width mm (in) 195 (7.7) 220 (8.7)
Overall Height S·L mm (in) 955 (37.6) · 1,082 (42.6)
Transom Height S·L mm (in) 435 (17.1) · 562 (22.1)
Weight
S kg (lb) 12.5 (28) 13 0 (29)
L kg (lb) 13.0 (29) 13 5 (30)
Output kW (Hp) 1.8 (2.5) 2.6 (3.5)
Max. Operating Range rpm 3,800-5,200 4,200-5,300
Idle Speed in Forward Gear rpm 1,100
Idle Speed in Neutral Gear rpm - 1,300
Engine Type 2 stroke
Number of Cylinder 1
Piston Displacement mL (Cu in) 74.6 (4.55)
Bore x Stroke mm (in) 47 x 43 (1.85 x 1.69)
Exhaust System Underwater exhaust
Lubrication Engine Fuel Mixture
Fuel Mixing Ratio 50 : 1
Cooling System Forced water cooling
Starting System Recoil starter & pull rope
Ignition System Flywheel Magneto C.D. Ign tion
Spark Plug NGK BP6HS-10/BPR6HS-10
Trim Position 4
Engine Oil Genuine moror oil or recommended one (TCW-III)
Gear Oil Genuine Gear Oil or API GL5, SAE #80 to #90,
approx 3.5B2:180mL, 3.5A2 & 2.5A2:90mL
Fuel Tank Capacity L (US gal) Approx. 1.4 (0.37) integral tank
Fuel Consumption (at full throttele)
L/H (US gal/Hr) 1.4 (0 37) 1.7 (0.45)
Gear Reduction Ratio 1.85 (13 : 24) 2.15 (13 : 28)
Clutch Forward F-N
Propeller (Blade x Diameter x Pitch) F-6 (3 x 188 x 145) I-7 (3 x 188 x 178)
Fuel Unleaded regular gasoline pump posted 87 Octane
(research octane rating of 91)
Remark : Spec fications subject to change w thout notice.