TOHATSU MFS 50A User Manual (English)

Other manuals for TOHATSU MFS 50A

Service Manual372 pages

Quick Reference Guide14 pages

Questions and Answers:

S
Sean LeeSep 1, 2025
Why does my TOHATSU MFS 50A Outboard Motor have low engine speed or poor boat speed?
- S
  susanwilliamsSep 2, 2025
  Low engine speed or poor boat speed in your TOHATSU Outboard Motor can be due to: * An empty fuel tank: Fill the fuel tank. * Incorrect fuel system connections: Verify the connections. * Air entering the fuel line: Check for air leaks. * A damaged fuel hose: Inspect and replace it. * A closed air vent on the fuel tank: Open it. * A clogged fuel filter or fuel pump: Replace the filter or pump. * A malfunctioning fuel pump: Repair or replace it. * Using improper engine oil: Use the correct oil. * Using improper gasoline: Use the correct type of gasoline.
A
anthonyjoshuaAug 31, 2025
What to do if my TOHATSU MFS 50A Outboard Motor runs erratically?
- N
  nmartinAug 31, 2025
  If your TOHATSU Outboard Motor runs erratically, several issues could be responsible: * Incorrect fuel system connections: Verify all fuel system connections. * Air in the fuel line: Check for air leaks. * Damaged fuel hose: Inspect and replace any deformed or damaged fuel hose. * Closed fuel tank vent: Open the air vent on the fuel tank. * Clogged fuel filter or pump: Replace the clogged fuel filter or pump. * Faulty fuel pump: Repair or replace the fuel pump. * Incorrect engine oil: Use the correct engine oil. * Improper gasoline: Use the correct type of gasoline.
H
Heather SimpsonAug 30, 2025
Why TOHATSU MFS 50A has low engine speed or poor boat speed?
- B
  Brian CooperAug 30, 2025
  If your TOHATSU Outboard Motor has low engine speed or poor boat speed, here are some possible causes: * Low compression: Perform a compression test. * Carbon deposits in the combustion chamber: Clean the combustion chamber. * Incorrect valve clearance: Adjust valve clearance. * Low oil pressure/level, oil pump failure, or a clogged oil filter: Check oil levels and replace filters. * Insufficient cooling water flow, or a clogged or defective pump: Inspect the cooling system.
K
Kevin HarrisonAug 28, 2025
What to do if there is a faulty thermostat in TOHATSU Outboard Motor?
- M
  Madeline DawsonAug 29, 2025
  If the thermostat in your TOHATSU Outboard Motor is faulty, replace it.
M
Michael RichardsonAug 27, 2025
How to troubleshoot a TOHATSU MFS 50A that is difficult to start?
- S
  stephanierobinsonAug 27, 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.
S
Sarah MosesAug 26, 2025
Why is my TOHATSU Outboard Motor engine difficult to start?
- J
  jpierceAug 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.
J
Jeremy HarveyAug 25, 2025
What to do if the starter motor on my TOHATSU MFS 50A will not crank?
- L
  lisatateAug 26, 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.
R
Rebecca BrownAug 23, 2025
Why is my TOHATSU MFS 50A Outboard Motor difficult to start?
- G
  georgelopezAug 25, 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.

TOHATSU MFS 50A Specifications

General

Brand	TOHATSU
Model	MFS 50A
Category	Outboard Motor
Language	English

Summary

General Safety Information

Safe Operation of Boat

Guidelines for safe operation of the boat and outboard motor.

Emergency Stop Switch

Information on the function and use of the emergency stop switch.

Personal Floatation Device

Recommendation for wearing a PFD while operating the boat.

Specifications

Parts Name

ET, EG (with multi-function tiller handle)

Identifies parts for ET/EG models with multi-function tiller.

ET (with RC)

Identifies parts for ET models with remote control.

Remote control box & Fuel tank (optional part)

Identifies components of the remote control box and fuel tank.

Label Locations

Warning Label Locations

Diagrams showing the placement of warning labels on the motor.

ECI (Emission Control Information) Decal Locations

Location of decals related to emission control information.

Installation

Mounting the Outboard Motor on Boat

Instructions for securely mounting the outboard motor onto a boat.

Remote Control Device Installation

Guidance on installing the remote control system components.

Battery Installation

Procedures and precautions for installing the boat battery.

Propeller Installation

Steps for correctly installing the outboard motor propeller.

Pre-Operating Preparations

Fuel Handling

Safety precautions and procedures for handling gasoline.

Engine Oil Recommendation

Guidelines on selecting the correct engine oil and its viscosity.

Break-In

Procedures for the initial break-in period of the new outboard motor.

Engine Operation

Fuel Feeding

Steps for supplying fuel to the engine before starting.

Starting the Engine

Procedures for starting the outboard motor.

Forward, Reverse, and Acceleration

How to shift gears and control acceleration.

Stopping the Engine

Instructions on how to safely stop the outboard motor.

Steering

Methods for steering the boat using the tiller or remote control.

Removing and Carrying the Outboard Motor

Removing the Outboard Motor

Steps for detaching the outboard motor from the boat.

Carrying the Outboard Motor

Safety precautions and methods for carrying the motor.

Storing the Outboard Motor

Proper procedures for storing the outboard motor.

Trailering

Tiller Handle Type

Specific precautions for trailering with a tiller handle motor.

Adjustment

Steering Friction

How to adjust the steering friction lever.

Trim Tab Adjustment

Procedure for adjusting the trim tab for better steering.

Inspection and Maintenance

Daily Inspection

Checks to perform before and after each use of the motor.

Periodic Inspection

Scheduled maintenance intervals and procedures.

Off-Season Storage

Steps for preparing the motor for long-term storage.

Battery

Instructions for battery maintenance and storage.

Pre-Season Check

Checks to perform before using the engine after winter storage.

Troubleshooting

Tool Kit and Spare Parts

Propeller Table

Emission Control System Information

Tampering and Modifications

Prohibitions against altering the emission control system.

Replacement Parts

Importance of using genuine parts for the emission control system.

Star Label

Explanation of the California Air Resources Board emission labels.

Limited Warranty Information

Things You Should Know About the Tohatsu Outboard Engine Limited Warranties

General information and terms of limited warranties.

TLDI Tohatsu Outboard Engine 5 Year Limited Warranty

Specific warranty coverage for TLDI outboard engines.

Four Stroke Tohatsu Outboard Engine 5 Year Limited Warranty

Specific warranty coverage for four-stroke outboard engines.

Consumer Assistance

Contact information and steps for seeking consumer assistance.

Periodic Maintenance Service Records

A logbook for recording scheduled maintenance services.

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