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MTD 139 cc OHV - User Manual

MTD 139 cc OHV
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MTD Products Ltd., P. O. Box 1386, KITCHENER, ONTARIO N2G 4J1
Printed In USA
Safe Operation Practices • Set-Up • Operation • Maintenance • Troubleshooting • Warranty
WARNING
READ AND FOLLOW ALL SAFETY RULES AND INSTRUCTIONS IN THIS MANUAL
BEFORE ATTEMPTING TO OPERATE THIS MACHINE.
FAILURE TO COMPLY WITH THESE INSTRUCTIONS MAY RESULT IN PERSONAL INJURY.
OPERATOR’S MANUAL
769-06653C
10.15.12
139 cc OHV Vertical Shaft Engine
* Model 1P65BOB Shown

Table of Contents

Questions and Answers

  • R
    Renee TuckerJul 31, 2025
    Why won't my MTD 139 cc OHV Engine start?
    • K
      Kelly CarterJul 31, 2025
      Your MTD Engine might fail to start due to several reasons. It could be a disengaged blade control, which requires you to engage it. Other possible causes include a disconnected spark plug boot (connect the wire), an empty or stale fuel tank (fill with fresh gasoline), the engine not being primed (prime as instructed), a faulty spark plug (clean, adjust gap, or replace), a blocked fuel line (clean it), a flooded engine (wait a few minutes to restart without priming), a closed fuel valve (open it), the engine not being choked (choke it), or a burnt fuse if it's an electric start (replace the fuse).
  • S
    Sonya JohnsonAug 16, 2025
    What to do if my MTD Engine runs erratically?
    • D
      David CastroAug 16, 2025
      If your MTD Engine is running erratically, there are several potential causes: * A loose spark plug boot: Connect and tighten the spark plug boot. * A blocked fuel line or stale fuel: Clean the fuel line and refill the tank with fresh gasoline. * A plugged vent in the gas cap: Clear the vent. * Water or dirt in the fuel system: Drain the fuel tank and refill with fresh fuel. * Running with the CHOKE applied: Put the CHOKE in the “OFF” position.

Summary

Important Safe Operation Practices

CALIFORNIA PROPOSITION 65

Operation

Training

Do not modify engine

Warning against modifying the engine, especially the governor.

Preparation

Safe Handling of Gasoline

Precautions and instructions for safely handling gasoline to prevent injury.

Spark Arrestor

Safety Symbols

READ THE OPERATORS MANUAL(S)

Instruction to read and follow all manual instructions before operation.

WARNING-GASOLINE IS FLAMMABLE

Warning about gasoline flammability and cooling the engine before refueling.

WARNING-CARBON MONOXIDE

Warning about carbon monoxide danger in poorly ventilated areas.

WARNING-ELECTRICAL SHOCK

Warning about electrical shock hazards, particularly in rain.

WARNING-HOT SURFACE

Warning about hot engine parts, especially the muffler.

WARNING! Your Responsibility

Emphasizes owner's responsibility for safe operation.

Set-Up

Gas & Oil

Extended Dipstick

Instructions for checking oil level using an extended dipstick.

Oil Recommendations

Fuel Requirements

Details on the type of gasoline to use and precautions.

Checking Oil Level

Step-by-step instructions for checking the engine oil level.

Adding Fuel

Safety instructions and steps for adding fuel to the engine.

Operation

Pre-Operation Check

Steps to perform before starting the engine, like checking oil and fuel.

Manual Choke System (On the Engine)

Stopping Engine

Starting the Engine

General safety warning and instructions for starting the engine.

Auto-Choke System

Step-by-step guide for starting engines with an auto-choke system.

Primer System

Engine Maintenance

Oil Service

Oil Change

Single Element Air Filter

Air Filter Service

Dual Element Air Filter

Spark Plug Service

Spark Plug Service

Fuel Filter Service

Storage

Storage

Removing From Storage

Removing From Storage

Troubleshooting

FEDERAL and;or CALIFORNIA EMISSION CONTROL WARRANTY STATEMENT

MTD 139 cc OHV Specifications

General IconGeneral
BrandMTD
Model139 cc OHV
CategoryEngine
LanguageEnglish

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