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TOHATSU MFS 40A - User Manual

TOHATSU MFS 40A
98 pages
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OWNERS
MANUAL
AAAA
MFS A
MFS A
OB No.--CBA
MFS A

Questions and Answers

  • S
    Sylvia HuntSep 10, 2025
    What to do if there is insufficient cooling water flow in TOHATSU MFS 40A?
    • S
      sullivancrystalSep 12, 2025
      To resolve insufficient cooling water flow in your TOHATSU Outboard Motor, inspect and clear the cooling water passages.
  • S
    Stephen KramerAug 22, 2025
    Why is my TOHATSU Outboard Motor difficult to start?
    • M
      Mr. James DawsonAug 23, 2025
      Several factors can cause a TOHATSU Outboard Motor to be difficult to start: * The fuel tank may be empty, in which case you should fill it. * There might be an incorrect connection in the fuel system, so verify all connections. * Air could be entering the fuel line; check for leaks. * A fuel hose might be deformed or damaged, requiring inspection and replacement. * The air vent on the fuel tank may be closed; open it. * The fuel filter or pump could be clogged, in which case you should replace them. * The fuel pump might be malfunctioning, requiring repair or replacement. * The fuel primer may not be supplying enough fuel, so ensure it is operating correctly.
  • D
    Dr. Christina LongAug 25, 2025
    What to do if the starter motor on my TOHATSU Outboard Motor will not crank?
    • R
      Ryan LeeAug 25, 2025
      If the starter motor on your TOHATSU Outboard Motor won't crank, ensure the motor is shifted into the neutral position. If that's not the issue, the ignition key switch may have failed and need replacement. Alternatively, the starter motor or starter solenoid may have failed, requiring service or replacement.
  • M
    Michael RollinsAug 26, 2025
    Why is my TOHATSU Outboard Motor engine difficult to start?
    • H
      holly00Aug 27, 2025
      If your TOHATSU Outboard Motor engine is difficult to start, several factors could be at play. First, ensure that your fuel tank isn't empty; if it is, refill it with the correct fuel. Also, verify that all connections in the fuel system are correctly made. Check for any air entering the fuel line and seal any leaks you find. If the fuel hose is deformed or damaged, replace it. Make sure the air vent on the fuel tank is open. Lastly, a clogged fuel filter or fuel pump could be the culprit, so clean or replace them as needed. If the fuel pump is malfunctioning, consider servicing or replacing it.
  • M
    Mr. Bryan Nichols PhDAug 28, 2025
    How to troubleshoot a TOHATSU Outboard Motor that is difficult to start?
    • T
      tsmithAug 28, 2025
      To address a TOHATSU Outboard Motor that's hard to start, begin by ensuring the fuel tank has an adequate supply of the correct fuel. Then, carefully inspect the fuel system connections to confirm they are properly connected. Check the fuel line for any air leaks and seal them. Replace any fuel hose that is deformed or damaged. Verify that the air vent on the fuel tank is open. If the issue continues, the fuel filter or fuel pump may be clogged and need cleaning or replacement. Should these steps not resolve the issue, the fuel pump may be faulty, and servicing or replacement may be necessary.
  • B
    bethany53Aug 29, 2025
    What to do if there is a faulty thermostat in TOHATSU MFS 40A?
    • M
      Michael WilsonAug 29, 2025
      If the thermostat in your TOHATSU Outboard Motor is faulty, replace it.
  • D
    davidnelsonSep 18, 2025
    What causes the Power Trim & Tilt to be inoperative on a TOHATSU Outboard Motor?
    • C
      ccoxSep 18, 2025
      If the Power Trim & Tilt on your TOHATSU Outboard Motor is inoperative, inspect and replace the power trim & tilt switch or solenoid, as they may be defective.
  • R
    raymondjohnsonSep 12, 2025
    What to do if there is low oil pressure or level in TOHATSU MFS 40A Outboard Motor?
    • L
      Lance RobinsonSep 12, 2025
      If you have low oil pressure or level in your TOHATSU Outboard Motor, check the oil level and pump functionality.
  • S
    steven10Sep 8, 2025
    What to do for carbon deposits in the combustion chamber of TOHATSU MFS 40A?
    • V
      vegalindseySep 8, 2025
      To address carbon deposits in the combustion chamber of your TOHATSU Outboard Motor, clean the combustion chamber.
  • R
    robertgallagherSep 5, 2025
    What to do if my TOHATSU MFS 40A battery will not hold charge?
    • J
      joshua57Sep 5, 2025
      If your TOHATSU Outboard Motor battery will not hold a charge, it might be due to a weak battery or loose/corroded connections. Check the battery condition and its connections.

Summary

General Safety Information

Stop Switch Lanyard

Proper use of the engine stop switch lanyard for safety.

Installation

Mounting the Outboard Motor on Boat

Procedures and safety precautions for securely mounting the motor on a boat.

Pre-Operating Preparations

Fuel Handling

Critical information on safe handling of gasoline and its hazards.

Fuel Filling

Procedures for safely filling the fuel tank, including precautions.

Engine Oil Filling

Instructions for filling engine oil to the correct level and safety warnings.

Engine Operation

Starting the Engine

Detailed instructions on how to safely start the outboard motor.

Forward, Reverse, and Acceleration

Safe procedures for shifting gears and accelerating the boat.

Stopping the Engine

Correct procedures for stopping the engine safely and performing post-operation checks.

Removing and Carrying the Outboard Motor

Adjustment

Inspection and Maintenance

Troubleshooting

Possible Cause

A table listing common problems and their potential causes.

TOHATSU MFS 40A Specifications

General IconGeneral
Horsepower40 HP
Gear Ratio2.08:1
Number of Cylinders3
Displacement866 cc
Fuel SystemElectronic Fuel Injection
Starting SystemElectric
Shaft Length20 inches
Fuel TypeUnleaded Gasoline
Max. RPM6000 RPM
Alternator Output12V
Engine Type4-Stroke

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