TOHATSU MFS 30B - User Manual

Questions and Answers

B
Benjamin PearsonAug 16, 2025
Why is my TOHATSU MFS 30B engine difficult to start?
- B
  Benjamin KlineAug 16, 2025
  If your TOHATSU Outboard Motor engine is hard to start, several factors could be at play. Start by checking if the fuel tank is empty and fill it if necessary. Ensure the fuel system connections are correct and inspect the fuel line for any leaks that might be letting air in. A deformed or damaged fuel hose should be replaced. Make sure the air vent on the fuel tank is open. The fuel filter or fuel pump might be clogged, requiring cleaning or replacement. Verify you're using the specified engine oil and recommended gasoline. Ensure you're adequately priming the fuel system. Finally, check the water temperature or MAP sensor and their wiring for any issues.
J
James RobinsonAug 19, 2025
What to do if my TOHATSU MFS 30B Outboard Motor engine runs erratically?
- C
  Carlos FranklinAug 19, 2025
  If your TOHATSU Outboard Motor engine runs erratically, begin by checking the fuel system connections and inspecting the fuel line for air leaks. Ensure the fuel filter and pump are free from clogs, cleaning or replacing them if needed. Verify that you're using the correct gasoline. Confirm the motor is shifted into neutral. Inspect the battery and its connections for looseness or corrosion. If the ignition key switch is faulty, replace it. Finally, examine the wiring and electrical connections for any issues and repair as necessary.
J
Jennifer OliverAug 22, 2025
How to improve low engine speed on my TOHATSU Outboard Motor?
- M
  Matthew RiveraAug 22, 2025
  If your TOHATSU Outboard Motor has low engine speed or poor boat speed, ensure you are using the correct engine oil. Check the water temperature or MAP sensor and wiring connections. Address any low compression issues and clean carbon deposits in the combustion chamber. Adjust the valve clearance if it's incorrect. Check the oil level and pump functionality, and clear any blockages from the pump for insufficient cooling water flow. Replace a faulty thermostat if necessary. Verify that the propeller is correct and not damaged. Adjust the thrust rod position if improper. Balance the load on the boat and adjust the transom height if it's too high or low.
A
antonio76Aug 26, 2025
What to do if the starter motor on my TOHATSU MFS 30B Outboard Motor will not crank?
- K
  kelsey08Aug 26, 2025
  If the starter motor on your TOHATSU Outboard Motor won't crank, begin by checking the 20 Amp fuse in the starting circuit and replace it if it's blown. Inspect the engine stop switch for a short circuit and repair if necessary. Ensure all wires and ground connections are securely connected. Make sure the gear is shifted into the neutral position. If the ignition key switch is faulty, it will need to be replaced. Check all wiring and electrical connections for faults and repair them. Lastly, the starter motor or starter solenoid might have failed and require replacement.
O
Olivia HullAug 28, 2025
How to troubleshoot an inoperative Power Trim & Tilt on a TOHATSU MFS 30B Outboard Motor?
- S
  sarah66Aug 28, 2025
  If the Power Trim & Tilt on your TOHATSU Outboard Motor is inoperative, the power trim & tilt switch or solenoid may be defective and need replacement. Also, check for incorrect wiring, disconnections, or poor connections, and correct them as necessary.
D
Dana PatelAug 31, 2025
Why won't the battery hold charge on my TOHATSU Outboard Motor?
- D
  David HernandezAug 31, 2025
  If the battery on your TOHATSU Outboard Motor will not hold a charge, check the battery and its connections for looseness or corrosion. Also, inspect the 20 Amp fuse in the starting circuit and replace it if it's blown.
T
Travis MoralesSep 3, 2025
What to do if TOHATSU MFS 30B Outboard Motor engine runs erratically?
- R
  ryan88Sep 3, 2025
  If your TOHATSU Outboard Motor engine runs erratically, it could be due to a few reasons. One potential cause is using a spark plug other than the specified type; replace it with the correct one. Another reason could be dirt or soot on the spark plug, so try cleaning it. Also, inspect and fix any issues related to spark generation if there's no spark or a weak spark.
P
Patricia MaldonadoSep 6, 2025
Why TOHATSU Outboard Motor has low engine speed / poor boat speed?
- C
  Christina BatesSep 6, 2025
  If you notice low engine speed or poor boat speed with your TOHATSU Outboard Motor, several issues could be responsible. Low compression could be a factor, so inspect and repair any related problems. Carbon deposits in the combustion chamber might be present, requiring cleaning. Incorrect valve clearance could also be the cause, so adjust it accordingly. Additionally, check oil levels and pressure, and replace or repair the oil pump and filter if there's low oil pressure/level, oil pump failure, or a clogged oil filter.
H
Hailey ElliottSep 9, 2025
What to do if Power T & T inoperative in TOHATSU MFS 30B Outboard Motor?
- T
  Travis JenningsSep 9, 2025
  If the power trim & tilt (T&T) on your TOHATSU Outboard Motor is inoperative, the power trim & tilt switch or the solenoid might be defective. Test and replace the power trim & tilt switch or solenoid.
J
John FitzgeraldSep 12, 2025
Why TOHATSU Outboard Motor battery will not hold charge?
- C
  Cameron SampsonSep 12, 2025
  If the battery of your TOHATSU Outboard Motor will not hold a charge, it could be due to a weak battery or loose/corroded battery connections. Check and tighten the battery connections. If the battery is weak, replace it.

Summary

General Safety Information

Emergency Stop Switch Safety

Information on the emergency stop switch and its tether for safety.

Safe Boat Operation Guidelines

Guidance on safe boat operation and operator responsibilities.

Servicing, Parts, and Lubricant Recommendations

Recommendations for service, parts, and lubricants.

Owners Maintenance Responsibility

Owner's responsibility for maintenance and safety checks.

Professional Mounting Requirements

Requirements for professional outboard motor mounting.

Specifications

Names of Parts

Location of Warning Labels

Installation

Outboard Motor Mounting Procedures

Procedures for mounting the outboard motor, including transom fit and height.

Remote Control System Installation Steps

Installing remote controls, cables, and wiring harness for boat operation.

Battery Installation and Connection Guide

Guidelines for safely installing and connecting the boat battery to the outboard motor.

Pre-Operating Preparations

Recommended Gasoline Types and Use

Guidance on selecting the correct type of gasoline for the outboard motor.

Fuel Hose Specification Requirements

Specifications for low permeation fuel hoses, especially for US/Canada models.

EPA Pressurized Fuel Tank Requirements

EPA requirements for pressurized portable fuel tanks used with outboard engines.

EPA Primer Assembly Usage

Using EPA approved primer bulb/hose assemblies for fuel system.

Recommended Engine Oil Specifications

Specifications for engine oil, including types and viscosity for optimal performance.

Engine Break-In Procedure and Benefits

Instructions for breaking in the new outboard motor for optimal service life.

Warning System Indicators and Operation

Understanding the warning horn and lamp indicators for engine faults.

Engine Operation

Fueling the Outboard Motor

Step-by-step instructions for filling the fuel tank safely and correctly.

Fuel Delivery and Priming

Procedures for feeding fuel to the engine using the primer bulb.

Starting the Outboard Motor Safely

Instructions and safety precautions for starting the outboard motor.

Engine Warm-up Procedure and Importance

Importance and steps for warming up the engine to ensure proper lubrication.

Forward and Reverse Gear Shifting

How to engage forward and reverse gears safely at appropriate speeds.

Stopping the Outboard Motor

Procedures for safely stopping the outboard motor.

Trim Angle Adjustment for Performance

How to set the trim angle for optimal hull performance and stability.

Tilting and Shallow Water Operation Guide

Procedures for tilting the motor up/down and operating in shallow water.

Removing and Carrying the Outboard Motor

Outboard Motor Removal Procedures

Steps to safely disconnect and remove the outboard motor from the boat.

Safe Carrying of the Outboard Motor

Guidelines for safely carrying the outboard motor, maintaining a vertical position.

Outboard Motor Storage Guidelines

Recommendations for properly storing the outboard motor, including positioning.

Trailering

Adjustment

Steering Friction Adjustment

How to adjust the tiller handle steering friction for comfortable operation.

Throttle Grip Adjustment for Smoothness

Adjusting the throttle grip for smooth throttle operation.

Remote Control Lever Load Adjustment

Adjusting the tension on the remote control lever for proper feel.

Trim Tab Adjustment for Straight Cruising

Adjusting the trim tab to ensure straight-line cruising.

Inspection and Maintenance

Daily Inspection and Checks

Checks to perform before and after each use for safe operation.

Periodic Inspection and Maintenance Schedule

Scheduled maintenance checks based on operating hours or months.

Off-Season Storage Preparation Steps

Steps for preparing the motor for long-term storage.

Pre-Season Check and Battery Maintenance

Procedures for checking the motor and battery before the season starts.

Submerged Motor Handling and Cleaning

Emergency measures and cleaning for a motor that has been submerged in water.

Cold Weather and Impact Precautions

Precautions for cold weather operation and checks after striking objects.

Tool Kit and Spare Parts

Optional Accessories

Propeller Table

Summary

General Safety Information

Emergency Stop Switch Safety

Information on the emergency stop switch and its tether for safety.

Safe Boat Operation Guidelines

Guidance on safe boat operation and operator responsibilities.

Servicing, Parts, and Lubricant Recommendations

Recommendations for service, parts, and lubricants.

Owners Maintenance Responsibility

Owner's responsibility for maintenance and safety checks.

Professional Mounting Requirements

Requirements for professional outboard motor mounting.

Specifications

Names of Parts

Location of Warning Labels

Installation

Outboard Motor Mounting Procedures

Procedures for mounting the outboard motor, including transom fit and height.

Remote Control System Installation Steps

Installing remote controls, cables, and wiring harness for boat operation.

Battery Installation and Connection Guide

Guidelines for safely installing and connecting the boat battery to the outboard motor.

Pre-Operating Preparations

Recommended Gasoline Types and Use

Guidance on selecting the correct type of gasoline for the outboard motor.

Fuel Hose Specification Requirements

Specifications for low permeation fuel hoses, especially for US/Canada models.

EPA Pressurized Fuel Tank Requirements

EPA requirements for pressurized portable fuel tanks used with outboard engines.

EPA Primer Assembly Usage

Using EPA approved primer bulb/hose assemblies for fuel system.

Recommended Engine Oil Specifications

Specifications for engine oil, including types and viscosity for optimal performance.

Engine Break-In Procedure and Benefits

Instructions for breaking in the new outboard motor for optimal service life.

Warning System Indicators and Operation

Understanding the warning horn and lamp indicators for engine faults.

Engine Operation

Fueling the Outboard Motor

Step-by-step instructions for filling the fuel tank safely and correctly.

Fuel Delivery and Priming

Procedures for feeding fuel to the engine using the primer bulb.

Starting the Outboard Motor Safely

Instructions and safety precautions for starting the outboard motor.

Engine Warm-up Procedure and Importance

Importance and steps for warming up the engine to ensure proper lubrication.

Forward and Reverse Gear Shifting

How to engage forward and reverse gears safely at appropriate speeds.

Stopping the Outboard Motor

Procedures for safely stopping the outboard motor.

Trim Angle Adjustment for Performance

How to set the trim angle for optimal hull performance and stability.

Tilting and Shallow Water Operation Guide

Procedures for tilting the motor up/down and operating in shallow water.

Removing and Carrying the Outboard Motor

Outboard Motor Removal Procedures

Steps to safely disconnect and remove the outboard motor from the boat.

Safe Carrying of the Outboard Motor

Guidelines for safely carrying the outboard motor, maintaining a vertical position.

Outboard Motor Storage Guidelines

Recommendations for properly storing the outboard motor, including positioning.

Trailering

Adjustment

Steering Friction Adjustment

How to adjust the tiller handle steering friction for comfortable operation.

Throttle Grip Adjustment for Smoothness

Adjusting the throttle grip for smooth throttle operation.

Remote Control Lever Load Adjustment

Adjusting the tension on the remote control lever for proper feel.

Trim Tab Adjustment for Straight Cruising

Adjusting the trim tab to ensure straight-line cruising.

Inspection and Maintenance

Daily Inspection and Checks

Checks to perform before and after each use for safe operation.

Periodic Inspection and Maintenance Schedule

Scheduled maintenance checks based on operating hours or months.

Off-Season Storage Preparation Steps

Steps for preparing the motor for long-term storage.

Pre-Season Check and Battery Maintenance

Procedures for checking the motor and battery before the season starts.

Submerged Motor Handling and Cleaning

Emergency measures and cleaning for a motor that has been submerged in water.

Cold Weather and Impact Precautions

Precautions for cold weather operation and checks after striking objects.

Tool Kit and Spare Parts

Optional Accessories

Propeller Table

TOHATSU MFS 30B Specifications

General

Brand	TOHATSU
Model	MFS 30B
Category	Outboard Motor
Language	English

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TOHATSU MFS 30B - User Manual

Table of Contents

Questions and Answers

Summary

General Safety Information

Emergency Stop Switch Safety

Safe Boat Operation Guidelines

Servicing, Parts, and Lubricant Recommendations

Owners Maintenance Responsibility

Professional Mounting Requirements

Specifications

Names of Parts

Location of Warning Labels

Installation

Outboard Motor Mounting Procedures

Remote Control System Installation Steps

Battery Installation and Connection Guide

Pre-Operating Preparations

Recommended Gasoline Types and Use

Fuel Hose Specification Requirements

EPA Pressurized Fuel Tank Requirements

EPA Primer Assembly Usage

Recommended Engine Oil Specifications

Engine Break-In Procedure and Benefits

Warning System Indicators and Operation

Engine Operation

Fueling the Outboard Motor

Fuel Delivery and Priming

Starting the Outboard Motor Safely

Engine Warm-up Procedure and Importance

Forward and Reverse Gear Shifting

Stopping the Outboard Motor

Trim Angle Adjustment for Performance

Tilting and Shallow Water Operation Guide

Removing and Carrying the Outboard Motor

Outboard Motor Removal Procedures

Safe Carrying of the Outboard Motor

Outboard Motor Storage Guidelines

Trailering

Adjustment

Steering Friction Adjustment

Throttle Grip Adjustment for Smoothness

Remote Control Lever Load Adjustment

Trim Tab Adjustment for Straight Cruising

Inspection and Maintenance

Daily Inspection and Checks

Periodic Inspection and Maintenance Schedule

Off-Season Storage Preparation Steps

Pre-Season Check and Battery Maintenance

Submerged Motor Handling and Cleaning

Cold Weather and Impact Precautions

Tool Kit and Spare Parts

Optional Accessories

Propeller Table

Summary

General Safety Information

Emergency Stop Switch Safety

Safe Boat Operation Guidelines

Servicing, Parts, and Lubricant Recommendations

Owners Maintenance Responsibility

Professional Mounting Requirements

Specifications

Names of Parts

Location of Warning Labels

Installation

Outboard Motor Mounting Procedures

Remote Control System Installation Steps

Battery Installation and Connection Guide

Pre-Operating Preparations

Recommended Gasoline Types and Use

Fuel Hose Specification Requirements

EPA Pressurized Fuel Tank Requirements

EPA Primer Assembly Usage

Recommended Engine Oil Specifications

Engine Break-In Procedure and Benefits

Warning System Indicators and Operation

Engine Operation

Fueling the Outboard Motor

Fuel Delivery and Priming

Starting the Outboard Motor Safely