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TOHATSU MFS 6BZ, Owner'S Manual, Page: 66 / 88

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TOHATSU MFS 6BZ Owner'S Manual Download Page 66

INSPECTION AND MAINTENANCE

66

10

1. Stop the engine and disconnect the

battery cable from the battery nega-
tive (-) terminal.

2. Remove the engine cover.

3. Remove the fuse box lid.

4. Remove the fuse and check it. If the

fuse is blown, replace it with a fuse of
the same specified rating. The out-
board motor is supplied with spare
fuses in the spare fuse holder.

1. 

Blown fuse

1

ENOF01421-0

Summary of Contents for MFS 6BZ

Page 1: ...O W N E R S M A N U A L Original instructions MFS 6BZ MFS 9 8B OB No 003 11113 6AK1 MFS 8B...

Page 2: ...ONS IN THIS MANUAL CAN RESULT IN SERIOUS INJURY OR DEATH KEEP THIS MANUAL IN A SAFE LOCATION FOR FUTURE REFERENCE Copyright 2019 Tohatsu Corporation All rights reserved No part of this manual may be r...

Page 3: ...erence 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...

Page 4: ...ace below please record the outboard motor s serial number indicated both on the clamp bracket or swivel bracket and on the cylinder block The serial number will be needed when ordering parts and when...

Page 5: ...on 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...

Page 6: ......

Page 7: ...orward reverse and acceleration 42 5 Stopping the engine 44 6 Steering 46 7 Trim angle 47 8 Tilt up and down 49 9 Shallow water operation 52 8 REMOVING AND CARRYING THE OUTBOARD MOTOR 55 1 Removing th...

Page 8: ...11 TROUBLESHOOTING 83 12 ACCESSORIES KIT 85 13 PROPELLER TABLE 86...

Page 9: ...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...

Page 10: ...R 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...

Page 11: ...e 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 inte...

Page 12: ...r Handle z z z z z z z Remote Control z z z z Power Tilt z z Manual tilt z z z z z z z z z F 9 8 B E P T L Model description Horse power Product generation Starter system Steering system Tilt system S...

Page 13: ...orward Gear min 1 rpm 900 Idle Speed in Neutral Gear min 1 rpm 950 Engine Type 4 Stroke Number of Cylinder 2 Bore Stroke mm in 55 44 2 17 1 73 Piston Displacement cm3 Cu in 209 12 8 Exhaust System Thr...

Page 14: ...ed in Forward Gear min 1 rpm 900 Idle Speed in Neutral Gear min 1 rpm 950 Engine Type 4 Stroke Number of Cylinder 2 Bore Stroke mm in 55 44 2 17 1 73 Piston Displacement cm3 Cu in 209 12 8 Exhaust Sys...

Page 15: ...le Speed in Forward Gear min 1 rpm 900 Idle Speed in Neutral Gear min 1 rpm 950 Engine Type 4 Stroke Number of Cylinder 2 Bore Stroke mm in 55 44 2 17 1 73 Piston Displacement cm3 Cu in 209 12 8 Exhau...

Page 16: ...e 8 Trim Tab 9 Propeller 10 Oil Plug Lower 11 Cooling Water Inlet 12 Oil Plug Upper 13 Splash Plate 14 Thrust Rod 15 Clamp Bracket 16 Clamp Screw 17 Tiller Handle 1 18 Throttle Grip 1 19 Shift Lever 1...

Page 17: ...ntilation Plate 8 Trim Tab 9 Propeller 10 Oil Plug Lower 11 Cooling Water Inlet 12 Oil Plug Upper 13 Splash Plate 14 Trim Lock Pin 15 Clamp Bracket 16 Clamp Screw 17 Tiller Handle 1 18 Throttle Grip 1...

Page 18: ...e 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 Air vent screw 10 Fuel tank cap 11...

Page 19: ...19 4 LABEL LOCATIONS ENOM00019 A Warning label locations 8 7 6 1 2 3 4 5 ENOF01405 3...

Page 20: ...ing label regarding position of outboard motor when setting down 5 1 Warning regarding emergency starting See page 39 5 2 Warning regarding high tempera ture 5 3 Warning regarding rotating object 5 4...

Page 21: ...LABEL LOCATIONS 21 4 8 Warning regarding gasoline See page 29 ENOF00005 L...

Page 22: ...ted Power Outboard Motor Serial No Mass Made in Japan 0123 CAN ICES 2 NMB 2 ENOF01406 2 2 3 4 5 6 1 MF EF model Rated Power Outboard Motor Serial No Mass Made in Japan 0123 CAN ICES 2 NMB 2 ENOF01406...

Page 23: ...kgf m 13 ft lb Check the fasteners for tightness from time to time z Be sure to use outboard mounting fasten ers included in the outboard motor pack age or their equivalents in terms of size material...

Page 24: ...tion 2 Tighten the clamp screws by turning their handles 3 Secure the clamp brackets to the transom board using bolts flat wash ers and nuts 4 Secure the outboard motor to the boat with a rope to prev...

Page 25: ...the bolts 2 Be sure to tighten the mounting bolt nuts to the specified torque 30 N m 3 0 kgf m 13 ft lb 3 For EP EFT type drill the holes in transom board only at left and right of lower side of clamp...

Page 26: ...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 z Read all warnings shown on the battery ca...

Page 27: ...system ENON00006 A Note Recommended battery 12V 40Ah 5HR 350 Cold Cranking Amps CCA In case of cold whether 12V 70Ah 5HR 650CCA Specifications and features of batteries vary among the manufacturers C...

Page 28: ...rse effects Some of these adverse effects are caused because the ethanol in the gasoline can absorb moisture from the air resulting in a separation of the water ethanol from the gasoline in the fuel t...

Page 29: ...smoke When or before refueling z Be sure to remove the static electricity charged in your body before refueling z The sparks due to static electricity may cause explosion of flammable gasoline z Stop...

Page 30: ...tructions See page 63 Use only high quality 4 stroke engine oil to insure performance and prolonged engine life The SAE oil viscosity 10W 30 or 10W 40 FC W outboard motor engine oil is rec ommended Yo...

Page 31: ...peration of the outboard motor z Keep peripheral area well ventilated z Always attempt to stay on the windward side of emission ENOW00023 1 Operating the outboard motor without break in can shorten se...

Page 32: ...type See next page for conditions which will lead to an abnormal condition or fault ENOM00040 C Location of warning buzzer and lamp Warning buzzer RC model EPT type Located inside the remote control N...

Page 33: ...ual In such the case and the ESG is activated not to ignite the spark plug therefore the engine speed varies and be controlled under 6300 min 1 rpm Low speed ESG Low speed ESG is a device to prevent t...

Page 34: ...replacing propeller with new one 2 Move to safe place quickly and stop the engine Check the engine oil level and add engine oil if necessary Consult your dealer if the engine oil level is too low or t...

Page 35: ...e procedure described below Fuel could blast out through the fuel tank cap in case the cap is loosened by using another procedure when internal pressure of fuel tank is raised by heat from sources suc...

Page 36: ...ischarging water and check if cooling water intake is blocked Operating engine could lead to overheating potentially leading to engine damage Con sult an authorized dealer if the cause cannot be found...

Page 37: ...oke knob ENON00501 0 Note Choke is not necessary when the engine is warm Set the throttle grip to RE START position ENON00502 0 Note If engine does not start with 4 or 5 times starting operation push...

Page 38: ...the engine speeds if the engine speeds unstable pull the choke knob to operated 7 Check the cooling water from cooling water check port Side mount RC type 1 Be sure to install the stop switch lock to...

Page 39: ...9 Check the cooling water from cool ing water check port ENOM00042 A Emergency starting ENOW00099 A When the emergency starter rope is used for starting engine z Start in gear protection does not wor...

Page 40: ...of the emergency starter rope and attach socket wrench that is included in the tool kit ENOW00860 0 Be sure to keep the harness away from the rotation parts 6 Be sure to install the stop switch lock t...

Page 41: ...ENOW00932 0 Be sure to check that cooling water is com ing out of the cooling water check port dur ing warm up Warm the engine at low engine speeds for about 3 minutes above 5 C 41 F 5 minutes at 2000...

Page 42: ...to a part of clothing that can be torn easily when pulled z Arrange the tether so that will not be caught by any object when pulled z Be careful not to pull the tether acciden tally during cruising U...

Page 43: ...r handle type ENOW00865 A Do not force to shift when the throttle grip is not in the fully closed position otherwise steering system and or shifting mechanism may be damaged 1 Shift lever Forward 1 Tu...

Page 44: ...will open the throttle Reverse 1 Quickly pull the control lever to the Reverse R position at 32 where the gear is connected while lifting up on the lock button located under the control lever grip 2 F...

Page 45: ...ever in the Neutral position and run the engine for 2 3 minutes at idling speed for cooling down if it has been running at full speed 1 Control lever 2 Main switch key 2 Turn the main switch key to th...

Page 46: ...trols When an operator falls into water be sure to use emergency stop switch lock of the spare Be sure to confirm the spare stop switch lock is in the tool bag before begin to operate ENOM00920 0 ENOW...

Page 47: ...inuing cruise z For outboard motor model with PT switch on the bottom cowl do not operate the switch during cruising or control of boat may be lost The trim angle of the outboard motor can be adjusted...

Page 48: ...eutral position 3 Tilt up the outboard motor 4 Remove the thrust rod as shown pic ture 1 Push in 2 Rise the stopper 3 Pull out 5 Reinstall the thrust rod in the desired position securely 6 Gentry tilt...

Page 49: ...OM00060 A ENOW00055 0 Do not tilt up or down outboard motor when swimmer s or passenger is near to prevent them from being caught between outboard motor body and clamp bracket in case the outboard mot...

Page 50: ...cowl Then slightly lower the motor for locking in the up position 1 Tilt lever 2 Tilt up position 3 Shallow water operating position ENOM00063 A Tilt down Slightly tilt the motor up and pull the tilt...

Page 51: ...release position ENOM00069 B Power Tilt type Tilt up 1 Operate the Power Tilt switch and tilt the outboard motor up 2 Lock the tilt with the Tilt stopper after the outboard motor has been tilted up Ti...

Page 52: ...ore operating the outboard motor If the manual relief valve is not closed the out board motor will tilt up when operated in reverse ENOW00873 0 Before opening the manual relief valve make sure nobody...

Page 53: ...otor up slowly by about 40 and then lower the tilt lever for setting at the shallow water running position Return to normal running position 2 Tilt the motor up fully and then return the motor down sl...

Page 54: ...N 54 7 1 Tilt release position ENOM00069 A Power Tilt type 1 Operate the Power Tilt switch and tilt the outboard motor up into desired shallow water running position 1 ENOF00551 1 UP DN ENOF00343 A UP...

Page 55: ...n hazard which can cause serious injury or death ENOW00065 0 Close air vent screw of fuel tank before car rying or storing outboard motor and fuel tank or fuel may leak potentially catching fire ENOW0...

Page 56: ...nk and fuel cock before carrying or storing outboard motor and fuel tank or fuel may leak potentially catching fire ENOW00071 0 The tilt support device supplied on your out board motor is not intended...

Page 57: ...d clearance should be provided sufficiently 2 Transom saver bar ENOW00067 0 Do not go under outboard motor tilted up even if it is supported by support bar or accidental fall of outboard motor could l...

Page 58: ...be adjusted in accordance with your preference by turning the steering friction adjustment bolt or lever EF MF type 1 Steering friction adjustment bolt 2 Increase 3 Decrease EFT type 1 Steering frict...

Page 59: ...l of outboard motor could lead to severe personal injury z Be sure to lock outboard motor when it is tilted up otherwise accidental fall of out board motor could lead to severe per sonal injury z Do n...

Page 60: ...ADJUSTMENT 60 9 1 Trim tab ENON00022 A Notes z After adjustment securely tighten the trim tab fixing bolt z Check for looseness of the bolt and the trim tab at regular intervals 1 1 ENOF00912 A...

Page 61: ...n and mainte nance procedures described in this sec tion z The maintenance intervals shown in the checklist apply to an outboard motor in normal use If you use your outboard motor under severe conditi...

Page 62: ...y and make sure the lock plate is there Remedy or replace Check cords for loose connections and damage Correct or replace Check the spark plugs for dirt wear and carbon build up Clean or replace Throt...

Page 63: ...replenishing ENOW00079 A z Do not add engine oil of brand and grade other than existing one In case engine oil of other brand or grade is added drain all oil and ask dealer for treatment z In case oth...

Page 64: ...with a high acidic level use fresh water to remove salt chemicals or mud And flush cooling water passage after every cruising or before storing outboard motor for long time Before flushing remove the...

Page 65: ...e sure to remove the propeller when starting the engine in the test tank See page 72 Run the engine only at idling 1 Test tank 2 Water 3 Over 10 cm 4 in ENOM00950 0 Fuse replacement For electrical sta...

Page 66: ...the battery nega tive terminal 2 Remove the engine cover 3 Remove the fuse box lid 4 Remove the fuse and check it If the fuse is blown replace it with a fuse of the same specified rating The out boar...

Page 67: ...0 hours Ignition Spark plug z z z Check gaps Remove carbon deposits or Replace 0 8 0 9 mm 0 031 0 035 in Ignition timing 1 z z z Check timing Starting Sys tem Starter rope z z z z Check for wear or ch...

Page 68: ...severely dam aged Consult dealer z Wipe off engine oil well immediately if spilled and dispose of it in accordance with local fire prevention and environ ment protection regulations ENOW00090 0 Use o...

Page 69: ...off engine oil well immediately if spilled and dispose of it in accordance with local fire prevention and environment protection regulations ENON00031 0 Note z If any amount of water is found in engin...

Page 70: ...services Services by unqualified person could lead to engine damage Fuel filters are provided inside the fuel tank and engine ENOM00094 0 Fuel filter for engine 1 Replace the fuel filter provided ins...

Page 71: ...l 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 and bubbles is disappeared to remove the air ENON00033 0 Note Use...

Page 72: ...is thin and sharp Wear the groves during replacement to protect your hands ENOW00086 0 z Do not install propeller without thrust holder or propeller boss could be dam aged z Do not reuse split pin z...

Page 73: ...trodes and adjust spark gap to specification 1 Stop the engine 2 Remove the top cowl 3 Remove the spark plug caps 4 Remove the spark plugs by turning it counter clockwise using a 5 8 16 mm socket wren...

Page 74: ...INSPECTION AND MAINTENANCE 74 10 adjusted to the correct torque as soon as possible with a torque wrench ENOF01427 0...

Page 75: ...ated on the gear case cylinder etc When the anode is eroded more than 1 3 of original size replace it ENON00029 0 Notes z Never grease or paint the anode z At each inspection re tighten the anode atta...

Page 76: ...rvoir tank while the tank is kept in a vertical posi tion 1 Tilt the outboard motor up and lock the tilt with the tilt stopper 2 Remove the oil cap by turning counter clockwise then check if the oil l...

Page 77: ...INSPECTION AND MAINTENANCE 77 10 ENOM00960 0 Grease point Apply water proof grease to the parts shown below ENOF01429 0...

Page 78: ...oroughly with fresh water Drain the water completely Wipe off any surface water with an oily rag 2 Remove the fuel hose from the out board motor 3 Drain all fuel from the fuel hoses fuel pump and carb...

Page 79: ...rst fill the fuel tank with fresh fuel If the fuel tank is only partially filled air in the tank can cause the fuel to deteriorate during storage 1 Before adding fuel stabilizer additive drain the car...

Page 80: ...until fuel flows out of the drain hole 6 Leave the outboard motor in this position until all fuel has been drained 7 When thoroughly drained retighten the drain screw securely 8 Check the drained fuel...

Page 81: ...t to assure optimum performance ENOM00105 A ENOW00098 0 Do not attempt to start submerged outboard motor immediately after it is recovered or engine could be severely damaged After taking your outboar...

Page 82: ...ow and consult a dealer as soon as possible 1 Stop the engine immediately 2 Check the control system gear case boat transom etc 3 Return to the nearest harbor slowly and carefully 4 Consult a dealer c...

Page 83: ...z z z z z Closed air vent on fuel tank z z z z z z z Clogged fuel filter fuel pump or carburetor z z z z z Use of improper engine oil z z z z z z Use of improper gasoline z z z z Excessive supply of...

Page 84: ...ttle link z z Insufficient cooling water flow clogged or defective pump z z z Faulty thermostat z z z z Cavitation or ventilation z z z z z Incorrect propeller selection z z z z z z Damaged or bent pr...

Page 85: ...wrench handle 1 Screwdrivers 1 Cross and straight point Screwdriver handle 1 Spare parts Emergency starter rope 1 Spark plug 1 NGK DCPR6E Split pin 1 Stop switch lock 1 Parts Packaged with Engine Fuel...

Page 86: ...e recommended range 5000 6000 min 1 rpm Propeller Mark Propeller Size Diameter pitch No of Blades in mm Light boats 9 5 3 8 9 10 226 255 8 5 3 8 9 8 3 226 211 7 5 3 8 5 7 5 216 190 7 0 3 8 9 7 0 226 1...

Page 87: ......

Page 88: ...O W N E R S M A N U A L 5 4 Azusawa 3 Chome Itabashi Ku Tokyo 174 0051 Japan Tel 81 3 3966 3117 Fax 81 3 3966 0090 www tohatsu com MFS 6BZ MFS 8B MFS 9 8B...

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