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TOHATSU MFS 4B, Owner'S Manual

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TOHATSU MFS 4B Owner'S Manual Download Page 7

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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

INDEX

GENERAL SAFETY INFORMATION

Summary of Contents for MFS 4B

Page 1: ...4B 5B 6B MFS OB No 003 11059 6 MANUAL OWNER S...

Page 2: ...d 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 I...

Page 3: ...ves as your warranty registration 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 chec...

Page 4: ...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...

Page 5: ...OUTBOARD MOTOR 1 Removing the outboard motor 2 Carrying the outboard motor 3 Storing the outboard motor TRAILERING ADJUSTMENT 1 Steering friction 2 Throttle grip 3 Reverse lock INSPECTION AND MAINTENA...

Page 6: ......

Page 7: ...STALLATION 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 OP...

Page 8: ...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...

Page 9: ...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 co...

Page 10: ...ed 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 co...

Page 11: ...l Plug Lower Fill Water Inlet Oil Plug Upper Level Thrust Rod 14 15 16 17 18 19 20 21 22 23 24 25 26 Clamp Bracket Clamp Screw Throttle Grip Shift Lever Starter Handle Choke Knob Stop Switch Fuel Conn...

Page 12: ...rate the outboard motor until it has been securely mounted on the boat in accordance with the instructions below 1 Mounting the outboard motor on boat INSTALLATION Boat Transom Center of Boat Before b...

Page 13: ...ability going out of control or re disaster Loose clamp screws and or mounting bolts can lead to coming off or displacement of outboard motor possibly going out of control or causing serious personal...

Page 14: ...if over lled may leak through an air vent screw when it is open Leaking gasoline is a dangerous re hazard Consult an authorized dealer for details on handling of gasoline if necessary Gasoline and its...

Page 15: ...mospheric temperature from the chart below 15 1 2 3 4 5 6 7 8 9 10 11 12 13 PRE OPERATING PREPARATIONS Note Use of engine oils that do not meet these requirements will result in reduced engine life an...

Page 16: ...t full performance for longer service life Operating the outboard motor without break in can shorten service life of the product If any abnormality is experienced during the break in Discontinue the o...

Page 17: ...ish engine oil If the oil level is within the appropriate level Consult with your dealer ESG is a device to prevent over revolution of the engine more than approximately 6 250 rpm If you sense that th...

Page 18: ...carburetor by squeezing the primer bulb until it is rm Separate fuel tank Place the shift lever in the Neutral position Be sure that the shift is in neutral when starting the engine This model is prov...

Page 19: ...tes 19 1 2 3 4 5 6 7 8 9 10 11 12 13 ENGINE OPERATION If the engine starts in gear do not use it Contact an authorized dealer Note Start in gear protection prevents engine from starting at other than...

Page 20: ...0 14 13 12 11 10 9 8 7 6 5 4 3 2 1 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 recoi...

Page 21: ...hortens the engine s life Be sure to check that cooling water is coming out of the cooling water check port during warm up 2 Warming up the engine If the engine is operated without water discharging f...

Page 22: ...se Before shifting into forward or reverse make sure that boat is properly moored and outboard motor can be steered fully to the right and left Make sure that no swimmer s is ahead or astern of the bo...

Page 23: ...erse can accelerate wear or degradation of parts In such case replace gear oil earlier than the period speci ed Be sure to warm up engine well before starting cruise Operating cold engine may cause da...

Page 24: ...rod or preset knob higher if the bow of the boat is below horizontal 24 14 13 12 11 10 9 8 7 6 5 4 3 2 1 ENGINE OPERATION 5 Trim angle Perpendicular to the water surface Knob Excessive trim up or dow...

Page 25: ...ne before adjusting trim angle Excessive trim up or down may lead to unstable boat operation potentially causing the steering dif culty that leads to accident during cruising Do not cruise at high spe...

Page 26: ...engine may be damaged from overheating due to lack of suf cient cooling water Do not put hand or nger in between outboard motor body and clamp bracket when adjusting trim angle to prevent injury in c...

Page 27: ...o strike outboard motor against sea bottom or propeller may be pushed out of water resulting in loss of control Tilt lever Tilt stopper Do not tilt up or down outboard motor when swimmer s or passenge...

Page 28: ...g above Elevate power unit 2 inches to 4 inches if traveling to avoid oil spillage 2 Carrying the outboard motor 3 Storing the outboard motor REMOVING AND CARRYING THE OUTBOARD MOTOR Do not carry or s...

Page 29: ...be in a vertical normal running position fully down Trailering in the tilted position may cause damage to the outboard motor boat etc If trailering with outboard fully down is not available the gear...

Page 30: ...14 13 12 11 10 9 8 7 6 5 4 3 2 1 1 Steering friction 2 Throttle grip 3 Reverse lock ADJUSTMENT Steering adjustment Screw Heavier Lighter Heavier Lighter Throttle adjustment screw Reverse lock link A...

Page 31: ...es and systems may be performed by any marine SI Spark Ignition engine repair establishment or individual 31 1 2 3 4 5 6 7 8 9 10 11 12 13 Your personal safety and that of your passengers depends on h...

Page 32: ...the throttle grip Correct Recoil Starter Check the rope for wear and cha ng Check the ratchet engagement Replace Correct or replace Clutch and Propeller System Check that clutch engages correctly whe...

Page 33: ...thorized dealer if the engine oil is milky color or appears contaminated Oil filler cap Dipstick Lower Level 350 mL Upper Level 450 mL Do not add engine oil of brand and grade other than existing one...

Page 34: ...ream of water flowing out of the water pump indicator hole Continue flushing the outboard motor for 3 to 5 minutes carefully monitoring water supply at all times Stop the engine turn off the water and...

Page 35: ...ller shaft holder Propeller Washer Split pin Nut Do not hold propeller with hand s when loosening or tightening propeller nut Put a piece of wood block between propeller blade and anti ventilation pla...

Page 36: ...mm 0 031 to 0 035 in Notes Spark plug torque 18 0Nm 13 3ft lb 1 84kgf m If a torque wrench is not available when you are tting a spark plug a good estimate of the correct torque is 1 4 to 1 2 a turn...

Page 37: ...plug Check gaps Remove carbon deposits or Replace 0 8 0 9mm 0 031 0 035in Ignition timing Check timing Starting System Starter rope Check for wear or cha ng Starter motor Check for salt deposits and t...

Page 38: ...engine life Use oils that carry the API rating of SF SG SH or SJ Select the appropriate viscosity based on atmospheric temperature from the chart below You can also use NMMA FC W certi ed 4 stroke out...

Page 39: ...level is over upper limit marks of oil gauge drain oil to level lower than upper limit Be sure that outboard motor is in upright and level position when checking or changing oil Stop engine immediate...

Page 40: ...the lower oil plug hole and fill with gear oil by squeezing the oil tube Fuel pick up elbow Filter INSPECTION AND MAINTENANCE Oil plug hole Uper Oil plug Lower Be sure that outboard motor is secured t...

Page 41: ...Keep in mind that if gasoline is kept in the carbruretor for a long time gum and varnish will develop causing the oat valve to stick restricting the fuel ow Remove the spark plugs and spray storage o...

Page 42: ...D MAINTENANCE Be sure to use cloth to remove fuel remaining in the cowl and dispose of it in accordance with local re prevention and environment protection regulations Notes The following steps must b...

Page 43: ...r may need to be changed again after running a short period to get all moisture completely out of the crankcase Inject a suf cient amount of engine oil through the spark plug holes Pull the recoil sta...

Page 44: ...xtension case bolts propeller or propeller shaft upper and lower mount rubber bolts and or mount bracket bolts Ask an authorized dealer to tighten any loose bolts and nuts and to replace damaged parts...

Page 45: ...starting but stopping soon Poor idling Poor acceleration Engine speed abnormally high Engine speed abnormally low Boat speed low Overheating of engine Warning lamp ON Possible cause FUEL SYSTEM Empty...

Page 46: ...high Engine speed abnormally low Boat speed low Overheating of engine Warning lamp ON Possible cause ELECTRICAL SYSTEM Spark plug other than speci ed Dirt soot etc on spark plug No Spark or weak spark...

Page 47: ...ompression Carbon deposits in the combustion chamber Incorrect valve clearance Low oil pressure level ENGINE OIL SYSTEM Low oil level Use of improper oil Oil deterioration Clogged oil strainer Faulty...

Page 48: ...E PARTS Items Quantity Remark Service tools Tool bag Pliers Socket wrench Socket wrench Socket wrench handle Screwdrivers Screwdriver handle 1 1 1 1 1 1 1 10 13 mm 16 mm Cross and straight point Spare...

Page 49: ...ing attachment Genuine grease 250g Genuine gear oil 500ml Touch up paint 300ml Genuine engine oil 450ml Fuel Tank Primer Bulb Ass y 12L Propeller Remoto control box Various kinds of fitting parts are...

Page 50: ...500 rpm 5 4 500 to 5 500 rpm 6 5 000 to 6 000 rpm S Short shaft L Long shaft UL Extra long shaft Sail Pro 50 14 13 12 11 10 9 8 7 6 5 4 3 2 1 PROPELLER TABLE Propeller Mark Propeller Size Diameter pi...

Page 51: ......

Page 52: ...d in any from or by any means without the express written permission of Tohatsu Corporation TOHATSU CORPORATION Address 5 4 3 chome Azusawa Itabashi ku TOKYO 174 0051 JAPAN Phone TOKYO 03 3966 3117 FA...

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