TOHATSU MFS 3.5B Owner's Manual
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TOHATSU MFS 3.5B Owner's Manual

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OWNER'S
MANUAL
2.5B
MFS
3.5B
OB No.003-11085-2

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Summary of Contents for TOHATSU MFS 3.5B

  • Page 1 OWNER’S MANUAL 2.5B 3.5B OB No.003-11085-2...
  • Page 2 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...
  • Page 3 IF THIS PROCEDURE IS NOT FOLLOWED, YOUR OUTBOARD MOTOR WILL NOT BE COVERED BY THE APPLICABLE LIMITED WARRANTY. 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.
  • Page 4 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.

  • Page 5: Table Of Contents

    CONTENTS GENERAL SAFETY INFORMATION SPECIFICATIONS NAMES OF PARTS INSTALLATION 1. Mounting the outboard motor on boat PRE-OPERATING PREPARATIONS 1.Gasoline and engine oil 2.Break-in 3.ESG 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 7.Outboard motor positionin tilt up REMOVING AND CARRYING THE OUTBOARD MOTOR 1.Removing the outboard motor...
  • Page 7 INDEX 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 10.TROUBLESHOOTING 11.TOOL KIT AND SPARE PARTS 12.OPTIONAL ACCESSORIES 13.PROPELLER TABLE...

  • Page 8: General 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,"...
  • Page 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.

  • Page 10: Specifications

    SPECIFICATIONS 2.5B , 3.5B MODEL 2.5B 3.5B Item 690 (27.2) Overall Length mm (in) 363 (14.3) Overall Width mm (in) Overall Height S·L mm (in) 1,026 (40.4) · 1,153 (45.4) Transom Height S·L mm (in) 435 (17.1) · 562 (22.1) 18.4 (41) ·...

  • Page 11: Names Of Parts

    NAMES OF PARTS 2.5B , 3.5B Integral Fuel Tank Fuel Tank Cap Water Inlet Choke Knob Tilt Handle Oil Plug (Upper) (Level) Stop Switch Top Cowl Drive Shaft Housing Tilt Stopper Cowl Latch Thrust Rod Engine Oil Filter Cap Cooling Water Check Port Clamp Bracket Engine Oil Drain Screw Steering Adjustment Screw...

  • Page 12: Installation

    INSTALLATION To attach the outboard motor to the 1. Mounting the outboard motor on boat boat, tighten the clamp screws by turning their handles. Also, use the bolts to secure the ������� outboard motor brackets on transom Most boats are rated and certified board.
  • Page 13 INSTALLATION ������� ������� If the length of security line being used It is recommended to install upper mounting bolts with bolt head at inside is long enough to allow the outboard to disengage off the boat transom but surface of transom. Bolts with threaded is too short to not allow the outboard end at inside surface of transom can to submerge behind the boat and stop...

  • Page 14: Pre-Operating Preparations

    PRE-OPERATING PREPARATIONS 1. Gasoline and engine oil ������ Consult an authorized dealer for details Required Gasoline types on handling of gasoline, if necessary. UNITED STATES AND CANADA: Gasoline and its vapors are very flammable and can be explosive. Use a major brand of automotive unleaded gasoline with a minimum When carrying a fuel tank containing posted octane rating of 87.
  • Page 15 PRE-OPERATING PREPARATIONS Engine Oil U s e o n l y h i g h q u a l i t y 4 - s t r o k e engine oil to insure performance and prolonged engine life. Use NMMA FC-W certified 4-stroke engine oil below.

  • Page 16: Break-In

    PRE-OPERATING PREPARATIONS 2. Break-In Your new outboard motor and lower ������� unit require break-in for the moving c o m p o n e n t s a c c o r d i n g t o t h e Operating the outboard motor without break-in can shorten service life of the conditions described in the following...

  • Page 17: Esg

    PRE-OPERATING PREPARATIONS 3. ESG (A device preventing over revolution) ESG is a device to prevent over revolution of the engine (more than approximately 6,300 rpm). If you sense that the ESG is activated return to shore at a reduced speed (rpm).

  • Page 18: Engine Operation

    ENGINE OPERATION Before starting Loosen the air vent screw on the tank cap. Before starting engine for the first time after reassembling engine or off-season Air vent screw storage, disconnect stop switch lock and pull the starter handle completely out approximately 10 times in order to prime the oil pump.
  • Page 19 ENGINE OPERATION Set the throttle grip to "START" When the motor starts, push the position. choke knob back. (in the case the choke knob is used.) Note When warming up the engine in cold weather , set the choke knob to half opened position if necessary.
  • Page 20 ENGINE OPERATION If the recoil starter fails to operate Remove the top cowl and the recoil starter. Remove the recoil starter. Cowl latch Tighten the three bolts (A,B,C) Removing the recoil starter fastening the tank and one bolt (D) fastening the recoil starter. Confirm that the shift lever is at Neutral (N) position.
  • Page 21 ENGINE OPERATION ������� Be careful that your clothes or other items do not get caught in the rotating engine parts. To prevent accident and injury, do not re-attach the recoil starter after the engine has been started using the emergency starter rope. Be sure to put the top cowl back on.

  • Page 22: Warming Up The Engine

    ENGINE OPERATION 2. Warming up the engine Engine speeds Idling speed after warming up. War m the engine at low engine Remark: In case of cold engine speeds for about three minutes. This starting, idling speed is increased allows the lubricating oil to circulate to about 300 rpm for several minutes.

  • Page 23: Forward And Reverse

    ENGINE OPERATION 3. Forward and reverse Note When moving astern, be sure to ������� operate the motor at a low speed without unnecessary increase of the motor speed. Before shifting into forward, or reverse, make sure that boat is properly moored and outboard motor can be steered �������...
  • Page 24 ENGINE OPERATION ������� Reverse Turn the engine speed to the lowest in During shallow water operation, be the same manner as the operation for careful not to place your hand between moving ahead. After setting the shift the swivel bracket and the stern bracket. lever to the Neutral (N) position and Be sure to tilt the outboard down slowly.

  • Page 25: Stopping

    ENGINE OPERATION Note Stop switch Slow down to trolling speed, and shift Stop switch into neutral before setting outboard lock motor to shallow water drive position. Shift Note lever Hook Idle speed may be higher during warming up of engine. If shifted to Air vent screw Forward during warming up, it may be difficult to shift back to neutral.

  • Page 26: Trim Angle

    ENGINE OPERATION 5. Trim angle The trim angle of the outboard motor can be adjusted to suit the transom angle of the hull, and load conditions. Choose an appropriate trim angle that will allow the anti-ventilation plate to run parallel to the water surface during operation.

  • Page 27: Tilt Up, Tilt Down

    ENGINE OPERATION 6. Tilt up, tilt down Tilt down Pull the outboard motor to your side and draw the tilt stopper knob out for ������� tilting down. When tilting up or down, be careful not Tilt stopper to place your hand between the swivel bracket and the stern bracket.

  • Page 28: Outboard Motor Positionin Tilt Up

    ENGINE OPERATION ������� 7. Outboard motor position in tilt up The outboard motor is set in the correct When the outboard motor is in the tilt- tilt-up position in the usual condition, up position, the tilt handle side must however, the outboard motor may be be in the upward direction (the starter set in the wrong tilt-up position if the motor direction is sharpy changed in...

  • Page 29: Removing And Carrying The Outboard Motor

    REMOVING AND CARRYING THE OUTBOARD MOTOR 1. Removing the outboard motor 3. Storing the outboard motor Stop the engine. Outboard motor should be stored in a Disconnect the fuel connector, vertical position. the remote control cables and the battery cords from the outboard Note motor.

  • Page 30: Trailering

    TRAILERING ������� Do not go under outboard motor tilted up even if it is supported by support bar, or accidental fall of outboard motor could lead to severe personal injury. ������� Close air vent screw of fuel tank and fuel cock before carrying or storing outboard motor and fuel tank, or fuel may leak, potentially catching fire.

  • Page 31: Adjustment

    ADJUSTMENT 1. Steering friction 2. Throttle grip The steering friction can be adjusted Friction adjustment of the throttle in accordance with your preference grip can be made with the throttle by turning the adjustment screw. adjustment screw. Lighter Lighter Heavier Heavier Steering adjustment screw...

  • Page 32: Inspection And Maintenance

    INSPECTION AND MAINTENANCE Care of your outboard motor EPA Emissions Regulations To keep your outboard motor in the EPA (United States Environmental best operating condition, it is very Protection Agency) has emission important that you perform daily and regulations regulating air pollution periodic maintenance as suggested from new outboard motors.

  • Page 33: Daily Inspection

    INSPECTION AND MAINTENANCE 1. Daily Inspection Perform the following checks before ������� and after use. Do not use outboard motor if any abnormality is found during pre-operation check or it could result in severe damage to the motor or severe personal injury. Item Points to Check Remedy...
  • Page 34 INSPECTION AND MAINTENANCE ������� Maintaining engine oil If the engine oil level is low, the life of the Do not add engine oil of brand and engine will be shortened significantly. grade other than existing one. In case engine oil of other brand or Checking oil level grade is added, drain all oil and ask dealer for treatment.
  • Page 35 INSPECTION AND MAINTENANCE Washing outboard motor If outboard motor is used in salt Remove the water plug from the water, brackish water or water with a motor, and screw in the flushing high acidic level, use fresh water to attachment. Connect a hose to the remove salt, chemicals or mud from flushing attachment.
  • Page 36 INSPECTION AND MAINTENANCE ������� Replacing the propeller and shear Do not hold propeller with hand(s) A worn-out or bent propeller will lower when loosening or tightening propeller the motor's performance, and cause nut. Put a piece of wood block between engine trouble.
  • Page 37 INSPECTION AND MAINTENANCE Notes Replacing the anode A sacrificial anode protects the When inspecting the plug, always o u t b o a r d m o t o r f r o m g a l v a n i c clean the gasket surface and use a corrosion.

  • Page 38: Periodic Inspection

    INSPECTION AND MAINTENANCE 2. Periodic Inspection It is important to inspect and maintain your outboard motor regularly. At each interval on the chart below, be sure to perform the indicated servicing. Maintenance intervals should be determined according to the number of hours or number of months, whichever comes first.
  • Page 39 INSPECTION AND MAINTENANCE Notes Your outboard motor should receive careful, and complete inspection at 300 hours. This is the best time for major maintenance procedures to be carried out. Replacing engine oil Engine oil mixed with dust or water will dramatically shorten the life of the U s e o n l y h i g h q u a l i t y 4 - s t ro k e engine.
  • Page 40 INSPECTION AND MAINTENANCE ������� Replacing gear oil You may be injured due to high engine ������� temperatures if you fill engine oil just after stopping. Changing engine oil Be sure that outboard motor is secured should be done after the engine has to transom or service stand, or been cooled.
  • Page 41 INSPECTION AND MAINTENANCE Insert the oil tube nozzle into the lower oil plug hole, and fill with gear oil by squeezing the oil tube until oil flows out of the upper plug hole. Oil plug hole (Upper) Install the upper oil plug, and then remove oil tube nozzle and install the lower oil plug.

  • Page 42: Off-Season Storage

    INSPECTION AND MAINTENANCE 3. Off-season storage Apply grease to the propeller shaft. Apply rust prevention to nuts and Before you put your outboard motor bolts, etc. in storage, it is a good opportunity to Stand the outboard motor up have it serviced and prepared by your vertically in a dry place, or tiller dealer.

  • Page 43: Motor Submerged In Water

    INSPECTION AND MAINTENANCE 5. Motor submerged in water 6. Cold weather precautions After taking your outboard motor out If you moor your boat in cold weather of the water, immediately take it to at temperatures below 0˚C (32˚F), your dealer. there is the danger of water freezing The following are the emergency in the cooling water pump, which may...

  • Page 44: Troubleshooting

    TROUBLESHOOTING If you encounter a problem, consult the check list below to determine the cause and to take the proper action. An authorized dealer will always be happy to provide any assistance and information. Possible cause Empty fuel tank Deformed or damaged fuel hose Closed air vent on fuel tank Clogged fuel filter, fuel pump, or carburetor Use of improper engine oil...
  • Page 45 TROUBLESHOOTING Possible cause Ignition timing incorrect Lock plate not fitted to stop switch Disconnection of wire or loose ground connection Incorrect adjustment of throttle link Insufficient cooling water flow, clogged or defective pump Faulty thermostat Cavitation or ventilation Incorrect propeller selection Damaged and bent propeller Improper thrust rod position Unbalanced load on boat...

  • Page 46: Tool Kit And Spare Parts

    TOOL KIT AND SPARE PARTS The following a list of the tools and spare parts provided with the motor. Items Quantity Remark Tool bag Pliers Socket wrench 13 mm Socket wrench 16 mm Service tools Socket wrench handle Screwdrivers Cross-and straight-point Screwdriver handle Starter rope Ø4-1,000 mm...

  • Page 47: Optional Accessories

    OPTIONAL ACCESSORIES Touch-up paint (300ml) Propeller Genuine engine oil (1l) Vinyl motor cover Flushing attachment Genuine grease (250g) Genuine gear oil (500ml)

  • Page 48: Propeller Table

    PROPELLER TABLE Use a genuine propeller. A propeller must be selected so that the engine rpm measured at wide open throttle while cruising is within the recommended range. 2: 4,500 to 5,500 rpm Notes 3.5: 5,000 to 6,000 rpm Each size shows number of propeller blades ×...
  • Page 49 M E M O...
  • Page 50 M E M O...
  • Page 52 OWNER’S MANUAL 2.5B TOHATSU CORPORATION 3.5B Address : 5-4, 3-chome, Azusawa, Itabashi-ku, TOKYO, 174-0051 JAPAN Phone : TOKYO (03)3966-3117 FAX : TOKYO (03)3966-2951 E-mail : www.tohatsu.co.jp 003-11085-2 0912NB Printed in Japan...

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