TOHATSU MFS 25C Owner's Manual
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TOHATSU MFS 25C Owner's Manual

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O W N E R' S
M A N U A L
AAAA
MFS 25C
MFS 30C
OB No.003-11118-8BA1

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Summary of Contents for TOHATSU MFS 25C

  • Page 1 O W N E R’ S M A N U A L AAAA MFS 25C MFS 30C OB No.003-11118-8BA1...
  • Page 2 MANUAL IN A SAFE LOCATION FOR FUTURE REFERENCE. Copyright © 2021 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.
  • Page 3 ENOM00006-1 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 proce- dures described later in this manual should be followed carefully.
  • Page 4 ENOM00005-A 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 when ordering parts, and when making technical or warranty inquiries. Serial Number: ENOF01100-1 Serial Number:...
  • Page 5 ENOM00007-0 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 “DAN- GER,” “WARNING,” “CAUTION,” and “Note.” Always pay special attention to such information to ensure safe operation of the outboard motor at all times.

  • Page 7: Table Of Contents

    2. Battery installation..........26 3. TOCS (Tohatsu Onboard Communication System) installation..27 6.
  • Page 8 11. TROUBLESHOOTING ..........86 12.
  • Page 9 INDEX 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.

  • Page 10: General Safety Information

    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.
  • Page 11 GENERAL SAFETY INFORMATION 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 recom- mended lubricants. ENOM00011-A MAINTENANCE As the owner of this outboard motor, you should be acquainted with correct mainte- nance procedures following maintenance section of this manual (See page 63).

  • Page 12: Specifications

    SPECIFICATIONS ENOM00810-B MODEL FEATURE Model F25C F30C Type Transom heights Tiller Handle Multi-function tiller handle Remote Control Power Tilt Gas-assisted tilt Manual tilt These models can be purchased with remote rigging kit or multi function tiller han- dle. ENOM00811-A MODEL NAME EXAMPLE F 30C ETL Model Product gen-...
  • Page 13 *1 Type I is conventional multi function tiller handle. Type II is equipped with a PTT switch on the end of throttle grip. *2 With propeller *3 With Manual Start Tohatsu outboard is power rated in accordance with ISO8665 (propeller shaft output).
  • Page 14 *1 Type I is conventional multi function tiller handle. Type II is equipped with a PTT switch on the end of throttle grip. *2 With propeller *3 With Manual Start Tohatsu outboard is power rated in accordance with ISO8665 (propeller shaft output).

  • Page 15: Parts Name

    PARTS NAME ENOM00820-0 ENOF01135-0 Tilt Handle Splash Plate Flushing Connector Cap Top Cowl Anode Warning Lamp Bottom Cowl Clamp Bracket Stop Switch Cooling Water Check Port Clamp Screw Stop Switch Lanyard Oil Drain Plug Tiller Handle Anti-ventilation Plate Throttle Grip Trim Tab Shift Lever Sub-water Inlet...
  • Page 16 PARTS NAME ENOM00020-0 ENOF01136-1 Tilt Handle Splash Plate Spark Plug Top Cowl Anode Oil Filler Cap Bottom Cowl Clamp Bracket Flushing Connector Cap Cooling Water Check Port Clamp Screw Warning Lamp Oil Drain Plug Stop Switch Multi-function Tiller handle Anti-ventilation Plate PT Switch *1 Trim Tab Key Switch...
  • Page 17 PARTS NAME ENOM00020-0 ENOF01137-B Tilt Handle Oil Plug (Upper) Spark Plug Top Cowl Splash Plate Oil Filler Cap Bottom Cowl Anode Flushing Connector Cap Cooling Water Check Port Clamp Bracket Warning Lamp PT Switch Stop Switch Multi-function Tiller handle *1 Oil Drain Plug PT Switch Stop Switch Lanyard...
  • Page 18 PARTS NAME ENOM00822-0 Remote control box & Fuel tank ENOF00127-K Control Lever Fuel Gauge Neutral lock arm Air Vent Screw PT switch Fuel Tank Cap Free throttle lever Tab Lock Main switch Fuel Connector (Engine side) Stop switch Primer Bulb Stop switch lock Fuel Connector (Fuel tank Stop switch lanyard...

  • Page 19: Label Locations

    LABEL LOCATIONS ENOM00019-A Warning label locations ENOF01134 A2...
  • Page 20 LABEL LOCATIONS 1, 2-4. Read owner's manual. Engine stop switch (See page 39,48 and 50). 3WL-72180-0 ENOF00131-B 2-1. Hot surface. When laying down the out board 2-2. Hazard caused by rotating parts. motor, be sure this decal is facing up. 2-3.
  • Page 21 LABEL LOCATIONS Warning regarding gasoline (See Warning tag regarding combination of page 28). fuel tank and primer bulb ass'y (See page 36). ENOF00005-L Warning regarding gasoline (See page 28). ENOF00005-M Warning regarding gasoline (See ENOF00005-T page 28). Warning tag regarding instructions of the fuel tank cap (See page 36).
  • Page 22 MODEL YEAR AND MONTH ENOF01129-A1 EPA Emissions Regulations The Emission Control Information label Outboards sold by Tohatsu America was affixed to engines as permanent evi- Corporation in the United States are dence of EPA certification. certified to the United States Environ-...

  • Page 23: Installation

    INSTALLATION ENOM00024-A ENOW00009-1A 1. Mounting the outboard WARNING motor on boat Mounting the outboard motor without following this manual can lead to unsafe ENOW00006-B conditions such as poor maneuverability, WARNING lack of control or fire. Loose clamp screws and/or mounting Before installing the outboard motor on the bolts can lead to the release or displace- boat, hang the outboard motor with the...
  • Page 24 INSTALLATION ENOM00026-0 ENOM00832-A Transom matching Mounting the outboard motor Be sure that the anti ventilation plate of Manual tilt type the outboard motor is 5–25 mm (0.2–1 1. Set the outboard motor to appropri- in) below the bottom of hull. ate position.
  • Page 25 INSTALLATION Loosening may cause a dangerous situa- ENOW00008-B tion, such as loss of control. CAUTION Upper mounting bolts should be installed PT type with the bolt head at inside surface of the 1. Set the outboard motor to appropri- transom. Mounting bolts installed with the ate position.

  • Page 26: Battery Installation

    INSTALLATION ENOM00029-A ENOW00014-0 2. Battery installation CAUTION Make sure that the battery leads do not ENOW00012-0 get stuck between the outboard motor WARNING and boat when turning, etc. The starter motor may fail to operate if Battery electrolyte contains sulfuric acid the leads are incorrectly connected.

  • Page 27: Tocs (Tohatsu Onboard Communication System) Installation

    2. Battery cord (black) ENOM00971-0 4. TOCS (Tohatsu Onboard Communication System) installation TOCS (Tohatsu Onboard Communication System) interface coupler can provide information regarding engine speed, fuel consumption, and various malfunction via an optional interface cable. Contact authorized Tohatsu dealer for more detail. ENOF01146-0...

  • Page 28: Pre-Operating Preparations

    TOHATSU engine will withstand up to CAUTION 10% ethyl alcohol (hereinafter referred When operating a TOHATSU engine on gaso- to as the "ethanol"), content in the gaso- line containing alcohol, storage of gasoline line. But even if the gasoline in your area...

  • Page 29: Fuel Filling

    PRE-OPERATING PREPARATIONS phase separation to take place. In addition, internal corrosion may take place during When or before refueling: storage if alcohol has washed protective oil Be sure to remove the static electricity films from internal components. charged in your body before refueling. The sparks due to static electricity may cause explosion of flammable gasoline.

  • Page 30: Engine Oil Filling

    PRE-OPERATING PREPARATIONS ENOM00037-D 3. Engine oil filling ENOW00022-1 CAUTION The engine oil is drained for shipping from the factory. Be sure to fill the engine to the proper level before starting engine. ENOF00029-0 ENOW00092-A 1. Air vent screw CAUTION 2. Fuel tank cap Do not overfill engine oil, or engine oil 2.
  • Page 31 PRE-OPERATING PREPARATIONS 10W−40 10W−30 ˚C ˚F ENOF00208-0 Engine oil volume Approximately 1800 mL (63.3 fl.oz.) ENOF01121-A 1. Filler cap 2. Dipstick ENOW0002A-A 3. Filler port CAUTION Use of engine oils that do not meet these requirements will result in reduced engine life, and other engine problems.

  • Page 32: Break-In

    PRE-OPERATING PREPARATIONS ENOM00033-A 4. Break-In Your new outboard motor and lower unit Always attempt to stay on the windward side of emission. require break-in for the moving compo- nents a ccording to the conditions described in the following time table. ENOW00023-1 Please refer to ENGINE OPERATION sec- CAUTION...

  • Page 33: Warning System

    PRE-OPERATING PREPARATIONS ENOM00039-0 5. Warning system If outboard motor encounters an abnor- mal condition of fault, the warning buzzer will emit a continuous beep or intermit- tent short beeps and the warning lamp (LED) will synchronize with the buzzer and engine speed will be limited (engine will ENOF00851-A not be stopped).
  • Page 34 PRE-OPERATING PREPARATIONS ENOM00041-B Warning indicators, faults and remedy Warning indicators High Description of faults Remedy Sound Lamp (LED) speed speed One beep On for 5 sec. Normal system test when start up Engine speed exceeds maximum Continuous allowable RPM Continuous Low oil pressure Continuous Water over temperature...
  • Page 35 PRE-OPERATING PREPARATIONS Remedy Reduce the throttle to less than half opening, and move to safe place quickly, and stop the engine. Check the propeller for bent or dam- aged blades. Consult an authorized dealer if engine shows the same result even after replacing propeller with new one.

  • Page 36: Engine Operation

    ENGINE OPERATION disconne c t stop switch lock and crank ENOM00042-0 approximately 10 times in order to prime the Before starting oil pump. ENOM00246-0 Oil Level checking ENOM00044-A Check the engine oil level before each 1. Fuel feeding use. If the oil level is low or too high, the life of the engine will be shortened signif- ENOW00029-A icantly.(To properly check the engine oil...
  • Page 37 ENGINE OPERATION otherwise fuel spillage may occur when the connector is connected to the engine. ENOF00036-0 Do not connect fuel connector except when 2 2 2 operating engine. Fuel leakage is a fire or explosion hazard, which can cause serious injury or death.

  • Page 38: Starting The Engine

    ENGINE OPERATION tilted up. Otherwise, fuel could overflow. 3. Over 10 cm (4 in.) ENOW00036-0 ENOM00045-A CAUTION 2. Starting the engine Be sure to stop engine immediately if cooling ENOW00958-0 water check port is not discharging water, WARNING and check if cooling water intake is blocked. Operating engine could lead to overheating Do not remove or install the top cowl potentially leading to engine damage.
  • Page 39 ENGINE OPERATION Tiller handle type 3. Set the throttle grip to START posi- tion. 1. Be sure to install the stop switch lock to the stop switch, and attach the stop switch lanyard securely to the operator or to the operator's PFD (Personal Flotation Device.) ENOF01107-0 1.
  • Page 40 ENGINE OPERATION (For electrical starter type) 3. Set the control lever in the Neutral position. 4. Push the starter switch button and release the button when the engine has started. ENOF00865-D 1. Shift lever ENOF01108-0 ENOW00031-0 1. Starter Button CAUTION Multi-function tiller handle type If the engine starts in gear, do not use it.
  • Page 41 ENGINE OPERATION ENOW00032-1 CAUTION Do not hold turning starter motor more than 5 seconds, or the battery may be consumed, potenti ally making the engine star ting impossible and/or damaging the starter. If cranking over 5 seconds fails to star t engine, return main switch to “ON”, and crank engine again after 10 seconds or more.
  • Page 42 ENGINE OPERATION 2. Insert the main switch key. 3. Set the control lever in the Neutral position. Do not raise the free throt- tle lever when starting the engine. ENOF00871-1 1. ON 2. START 3. OFF ENOF00870-1 1. Neutral (N) 2.
  • Page 43 ENGINE OPERATION 6. Check the cooling water from cooling 1. Remove the top cowl. water check port. ENOF01110-0 ENOF01111-0 2. Remove starter lock cable from recoil starter by pulling the starter lock ENOM00042-A Emergency starting cable. ENOW00099-A WARNING When the emergency starter rope is used for starting engine;...

  • Page 44: Warming Up The Engine

    ENGINE OPERATION 8. Pull the starter handle slowly until you feel engagement, keep pulling till you feel less resistance. Then pull it quickly. 9. After engine starts, do not reinstall the recoil starter and top cowl. ENOM00043-A 3. Warming up the engine ENOF00126-0 ENOW00932-0 5.
  • Page 45 ENGINE OPERATION ENOM00044-0 ENOM00 Engine speeds Trolling engine speed control Idling speed after warming up. function (except for normal tiller Remark: In case of cold engine starting, handle type) idling speed is increased about 400 min If the main switch key is pressed for 1 (rpm) for several minutes.

  • Page 46: Forward, Reverse, And Acceleration

    ENGINE OPERATION ENOM00046-A ENOW00861-0 4. Forward, reverse, and WARNING acceleration Do not shift at high boat speed, or control may be lost, falling down or causing passen- ENOW00037-0 ger(s) to be thrown overboard. Leading to WARNING serious personal injury. Before shifting into forward or reverse, make ENOW00862-0 sure that boat is properly moored and out- CAUTION...
  • Page 47 ENGINE OPERATION 2. When the engine reaches trolling (or ENOM00890-A Tiller handle type idling) speed, quickly pull the shift ENOW00865-0 lever to the Forward position. CAUTION Reverse 1. Turn the throttle grip to reduce Do not force to shift when the throttle grip is engine speed.

  • Page 48: Stopping The Engine

    ENGINE OPERATION 2. Further rearward motion will open ENOM00900-0 Side mount RC type the throttle. ENOW00867-0 Acceleration WARNING ENOW00867-A CAUTION Sudden acceleration and deceleration may cause passenger(s) to be thrown overboard Sudden acceleration and deceleration may or falling down. cause passenger(s) to be thrown overboard or falling down.
  • Page 49 ENGINE OPERATION ENOF00866-2 ENOF01120-0 4. Turn the main switch key to the OFF position or push the stop switch. ( Do not forget to turn the key off). ENOF01107-0 1. Throttle grip 2. Put the shift lever in the Neutral posi- tion.
  • Page 50 ENGINE OPERATION Side mount RC type Emergency engine stopping Remove stop switch lock to stop the 1. Put the control lever in the Neutral engine. position and run the engine for 2-3 minutes at idling speed for cooling down if it has been running at full speed.

  • Page 51: Steering

    ENGINE OPERATION ENOM00920-0 6. Steering ENOW00870-0 WARNING Sudden steering may cause passenger(s) to be thrown overboard or falling down. Tiller handle type Right turn Move the tiller handle to the left ENOF00869-A 1. Stop switch Left turn 2. Stop switch lock Move the tiller handle to the right.

  • Page 52: Trim Angle

    ENGINE OPERATION ENOM00050-0 7. Trim angle ENOW00043-A WARNING Adjust the trim angle when the engine is stopped. ENOF00051-1 Do not put hand or finger in between out- 1. Perpendicular to the water surface board motor body and clamp bracket when adjusting trim angle to prevent ENOM00053-0 injury in case the outboard motor body Improper trim angle (bow rises too...
  • Page 53 ENGINE OPERATION Manual Tilt type 4. Remove the thrust rod as shown pic- ture. ENOF00674-B 1. Thrust rod ENOF01238-1 2. Higher 1. Push in 3. Lower 2. Rise the stopper Power Tilt type 3. Pull out 5. Reinstall the thrust rod in the desired position securely.

  • Page 54: Tilt Up And Tilt Down

    ENGINE OPERATION 6. Reinstall the thrust rod in the desired ENON00921-0 Note position securely. Before tilting the outboard motor up, after 7. Put the Snap pin back and unlock the stopping the motor leave it in the running tilt stopper. position for about a minute to allow water 8.
  • Page 55 ENGINE OPERATION stops. (This is the tilt down position.) Now, lift up the outboard motor slightly, and then allow gravity to lower it for you. ENOF00067-2 ENOF02437-0 ENOF00059-0 1. Reverse lock lever 2. Tilt down position 3. Tilt up position ENOM00069-B ENOF00067-B Power Tilt type...

  • Page 56: Shallow Water Operation

    ENGINE OPERATION It is possible to tilt up or down in spite of Manual relief valve specified tightening main switch “ON” or “OFF”. torque · · 2 N·m (1.5 ft lb, 0.2 kgf ENOM00940-0 Manual relief valve If the battery is dead, and the power tilt ENOM00068-A switch thus inoperative, open the manual 9.
  • Page 57 ENGINE OPERATION Manual tilt type ENOM00069-A Power Tilt type 1. Shallow water running position: 1. Operate the Power Tilt switch and tilt Put the reverse lock lever in the tilt up the outboard motor up into desired position, and tilt up the outboard shallow water running position.

  • Page 58: Removing And Carrying The Outboard Motor

    REMOVING AND CARRYING THE OUTBOARD MOTOR ENOM00070-A 1. Removing the outboard motor ENOW00890-0 WARNING Before installing the outboard motor on the boat, hang the outboard motor with the hoist or equivalent device by attaching the engine hanger to the outboard. Use the hoist with allowable load is 150 kg (330 lbs) or above.

  • Page 59: Trailering

    REMOVING AND CARRYING THE OUTBOARD MOTOR Do not carry or store outboard motor in board motor, place port-side down on any of positions described below. a cushion or any softer surface shown Otherwise, engine oil or cooling water below. may enter the cylinder cause engine prob- Elevate power unit 2 inches to 4 inches lems.
  • Page 60 REMOVING AND CARRYING THE OUTBOARD MOTOR ENOW00071-0 CAUTION The tilt support device supplied on your out- board motor is not intended for towing. It is intended to support the outboard motor while the boat is docked, beached, etc. When transporting a boat on a trailer with the outboard motor still attached, disconnect the fuel line from the out- board motor beforehand and keep the...

  • Page 61: Adjustment

    ADJUSTMENT screw. ENOM00073-0 1. Steering friction Tiller handle type ENOW00074-A WARNING Do not overtighten the steering friction lever it could result in difficulty of movement resulting in the loss of control causing an accident and could lead to severe injury. ENOF00911-0 1.

  • Page 62: Trim Tab Adjustment

    ADJUSTMENT wise to decrease it. If straight-line cruising can not be achieved, adjust the trim tab located Side mount type under the anti-ventilation plate. If the boat veers toward the left direct the trim tab towards A (left from rear of boat).

  • Page 63: Inspection And Maintenance

    INSPECTION AND MAINTENANCE ENOM00077-0 Care of your outboard motor To keep your outboard motor in the best operating condition, it is very important that you perform daily and periodic maintenance as suggested in the main- tenance schedules that follow. ENOW00077-0 CAUTION Your personal safety and that of your pas- sengers depends on how well you main-...

  • Page 64: Daily Inspection

    INSPECTION AND MAINTENANCE ENOM00079-0 1. Daily Inspection Perform the following checks before and ENOW00078-1 after use. WARNING Do not use outboard motor if any abnormal- ity is found during pre-operation check oth- erwise it could result in severe damage to the motor or severe personal injury.
  • Page 65 INSPECTION AND MAINTENANCE Item Points to Check Remedy Steering • Check the operation of the steering handle. Repair Devices • Check if the anode is securely installed. Repair if necessary Other parts • Check the anode for corrosion and deformation. Replace ENOM00081-D Oil level checking...
  • Page 66 INSPECTION AND MAINTENANCE Wipe off engine oil well immediately if ENOW00920-0 spilled and dispose of it in accordance CAUTION with local fire prevention and environ- ment protection regulations. When washing the outboard motor, be care- Do not replenish engine oil over upper ful not to spray the water inside of the top limit.
  • Page 67 ENOW00036-A rected, the fuse will likely blow again. CAUTION If the fuse continues to blow, request an When the engine is started in the test tank, authorized Tohatsu dealer to inspect the to avoid over heating and water pump dam-...
  • Page 68 INSPECTION AND MAINTENANCE outboard motor. 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.

  • Page 69: Periodic Inspection

    INSPECTION AND MAINTENANCE ENOM00090-0 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 num- ber of months, whichever comes first.
  • Page 70 INSPECTION AND MAINTENANCE Inspection intervals First 20 Every 50 Every 100 Every 200 Description Inspection procedure Remarks hours or 1 hours or 3 hours or 6 hours or 1 month months months year Check for bent blades, damage, wear. Propeller Replace if necessary.
  • Page 71 INSPECTION AND MAINTENANCE ENOW00090-0 ENON00028-A Note CAUTION If a torque-wrench is not available when Use of engine oils that do not meet these you are fitting a oil filter, a good estimate requirements will result in reduced engine of the correct torque is 3/4 to 1 a turn past finger-tight.
  • Page 72 INSPECTION AND MAINTENANCE ENOM00092-A Oil filter replacement ENOW00091-0 CAUTION You may be injured due to high engine tem- peratures if you fill engine oil just after stop- ping. Changing engine oil should be done after the engine has been cooled. ENOF00113-0 ENOW00926-0 1.
  • Page 73 INSPECTION AND MAINTENANCE Install fuel filter with all related parts in place, or fuel leak could occur, leading to catching fire or explosion. Check fuel system regularly for leakage. Contact authorized dealer for fuel system services. Services by unqualified person could lead to engine damage.
  • Page 74 INSPECTION AND MAINTENANCE ENOM00096-A ENOM00098-A Fuel filter (for fuel tank) Gear oil replacement Water or dirt in the fuel tank will cause ENOW00094-0 engine performance problems. WARNING Check and clean the tank at specified Be sure that outboard motor is secured to times or after the outboard motor has transom or service stand, or accidental been stored for a long period of time...
  • Page 75 INSPECTION AND MAINTENANCE ENON00033-0 Note Use genuine gear oil or the recommended one (API GL-5: SAE #80 to #90). Required volume: approx. 360 mL (11.8 fl.Oz). ENOF01133-0 ENOW00928-0 CAUTION Wipe off gear oil well immediately if spilled and dispose of it in accordance with local fire prevention and environment protection regulations.
  • Page 76 INSPECTION AND MAINTENANCE ENOW00086-0 CAUTION Do not install propeller without thrust holder, or propeller boss could be dam- aged. Do not reuse split pin. After installing split pin, spread the pin apart to prevent it from falling out which could lead to the propeller coming off during operation.
  • Page 77 INSPECTION AND MAINTENANCE Do not touch spark plugs immediately after stopping engine as they will be hot and could cause severe burns if touched. Allow motor to cool down first. ENOF00085-0 ENOW00929-0 CAUTION 1. Electrode 2. Spark gap (0.8–0.9 mm, 0.031–0.035 in) Use only the recommended spark plugs.
  • Page 78 INSPECTION AND MAINTENANCE ENOM00088-A Anode replacement A sacrificial anode protects the outboard motor from electrolytic corrosion. Anode is located on the gear case, cylinder etc.. When the anode is eroded more than 1/3 of original size, replace it. ENON00029-0 Notes Never grease or paint the anode.
  • Page 79 INSPECTION AND MAINTENANCE Recommended oil ENOM00089-B Power Tilt oil checking Use an automatic transmission fluid or ENOW00088-0 equivalent. WARNING Recommended oils are as shown below. ATF Dexron III Be sure that outboard motor is secured to transom or service stand, or accidental Air purging from the Power Trim and Tilt drop or fall of outboard motor could lead unit.
  • Page 80 INSPECTION AND MAINTENANCE ENOM00960-0 Grease point Apply water proof grease to the parts shown below. ENOF01118-A...

  • Page 81: Off-Season Storage

    INSPECTION AND MAINTENANCE 2. Remove the fuel hose from the out- ENOM00100-A 3. Off-season storage board motor. 3. Drain all fuel from the fuel hoses, fuel ENOW00934-0 pump, fuel filter (See page 74) and WARNING vapor separator (See page 84), and clean these parts.
  • Page 82 INSPECTION AND MAINTENANCE 9. Stand the outboard motor up verti- Elevate power unit 2 inches to 4 inches if traveling to avoid oil spillage. cally in a dry place. ENOF01127-0 ENOM00950-0 Adding a fuel stabilizer When adding a fuel stabilizer additive (commercially available), first fill the fuel tank with fresh fuel.
  • Page 83 INSPECTION AND MAINTENANCE 8. Check the drained fuel for the pres- ENOM00970-0 Fuel system draining ence of water or other contaminants. ENOW00028-A If either is present, reassemble the WARNING outboard motor, refill the vapor sep- arator with fuel, and then drain the For details on handling fuel, contact an fuel again.

  • Page 84: Pre-Season Check

    INSPECTION AND MAINTENANCE 5. Recharge the battery once a month 7. Start the engine and warm up the to prevent it from discharging and the engine for 3 minutes in the “NEU- electrolyte from deteriorating. TRAL” position. 6. Store the battery in a dry place. 8.

  • Page 85: Cold Weather Precautions

    INSPECTION AND MAINTENANCE level. 4. Consult a dealer check the outboard The oil and filter may need to be motor before operation again. changed again after running a short period to get all moisture completely out of the crankcase. 4. Inject a sufficient amount of engine oil through the spark plug holes.

  • Page 86: Troubleshooting

    TROUBLESHOOTING ENOM00108-0 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 Incorrect connection of fuel system Air entering fuel line Deformed or damaged fuel hose...
  • Page 87 TROUBLESHOOTING Possible cause Low compression Carbon deposits in the combustion chamber Incorrect valve clearance Low oil pressure/level, oil pump failure, Clogged oil filter (Pressure switch ON) Insufficient cooling water flow, clogged or defective pump Incorrect valve timing (timing velt elongation or incorrect installation) Intake/exhaust valve seal failure Excessive wear of piston, piston ring or cylinder...

  • Page 88: Tool Kit And Spare Parts

    TOOL KIT AND SPARE PARTS ENOM00109-0 The followings are a list of the tools and spare parts provided with the motor. Items Quantity Remark Socket wrench 16 Socket wrench 10-13 Tool bag Socket wrench handle Pliers ± Screwdriver Emergency starter rope Spark plug NGK DCPR6E Propeller nut split pin...

  • Page 89: Propeller Table

    PROPELLER TABLE ENOM00111-0 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. 25 : 5000–6000 min (rpm) 30 : 5250–6250 min (rpm) Propeller Size (Diameter × pitch) Propeller Mark inch...

  • Page 90: Emission Control System Information

    EMISSION CONTROL SYSTEM INFORMATION ENOM01000-0 ENOM01003-0 Emission Sources Clean Air Acts of the United States and California, and Environment Canada Carbon monoxide, oxides of nitrogen EPA, California, and Canadian regula- and hydrocarbons are produced in the tions require all manufacturers to pro- course of the combustion process.
  • Page 91 ENOM01006-0 Replacement Parts 2011. The emission control system in your Tohatsu out board motor has be en designed, built, and certified to conform with the EPA and California emission reg- ulations. Whenever requesting mainte- nance, use of Tohatsu Genuine parts is highly recommended.
  • Page 92 EQUIPPED FOR UNITED STATES AND EQUIPPED FOR UNITED STATES AND CANADA MODEL CANADA MODEL The Environmental Protection Agency TOHATSU adopts Primer bulb/hose (EPA) required portable fuel systems that assembly approved by the Environment are produced after January 1, 2011 for use Protection Agency (EPA).
  • Page 93 EMISSION CONTROL SYSTEM INFORMATION label identifies engines that meet the Air ENOM01007-0 Maintenance Resources Board’s Personal Watercraft and Out board marine engine 2001 Follow the maintenance schedule pre- exhaust emission standards. sented on page 70. Keep in mind that this Engines meeting these standards have schedule is based on the assumption that 75% lower emissions than conventional...
  • Page 94 EMISSION CONTROL SYSTEM INFORMATION Sterndrive and Inboard marine engine 2003-2008 exhaust emission standards. Engines meeting these standards have 65% lower emissions than One Star-Low Emission engines. ENOF01004-0 ENOM01012-0 Four Stars-Super Ultra Low Emission The four-star label identifies engines that meet the Air Resources Board’s Stern- drive and Inboard marine engine 2009 exhaust emission standards.
  • Page 98 O W N E R’ S M A N U A L MFS 25C MFS 30C 5-4, Azusawa 3-Chome, Itabashi-Ku Tokyo 174-0051, Japan Tel: +81-3-3966-3117 Fax: +81-3-3966-0090 www.tohatsu.com...

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