Dolmar PM-46 BC - User Manual

Questions and Answers

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Lori ParksAug 7, 2025
Why Dolmar PM-46 BC Lawn Mower engine does not start?
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  George Patterson MDAug 7, 2025
  There are several reasons why your Dolmar Lawn Mower engine might not be starting. It could be due to the throttle choke not being in the correct position, an empty fuel tank (refer to the ENGINE OWNERS MANUAL for filling instructions), a dirty air cleaner element (refer to the ENGINE OWNERS MANUAL for cleaning), a loose spark plug (tighten to 25-30 Nm), a loose or disconnected spark plug wire (install the wire), an incorrect spark plug gap (set to 0.7 to 0.8 mm), a defective spark plug (refer to the ENGINE OWNERS MANUAL for installing a new one), a carburetor flooded with fuel (remove the air cleaner element and pull the starter rope until it clears, then reinstall the element), or a faulty ignition module (contact the service agent).
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kaylamartinezAug 12, 2025
What to do if Dolmar PM-46 BC engine is difficult to start or loses power?
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  Lori HallAug 12, 2025
  If your Dolmar Lawn Mower engine is hard to start or losing power, it could be due to dirt, water, or stale fuel in the tank (drain the fuel, clean the tank, and refill with fresh fuel), a plugged vent hole in the fuel tank cap (clean or replace the cap), or a dirty air cleaner element (clean the air cleaner element).
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Vincent FarmerAug 16, 2025
What to do if Dolmar PM-46 BC vibrates abnormally?
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  Mr. Edward SmithAug 16, 2025
  If your Dolmar Lawn Mower is vibrating abnormally, the cutting assembly might be loose (tighten the blade) or unbalanced (balance the blade).
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Colleen BrownAug 20, 2025
Why Dolmar PM-46 BC Lawn Mower engine overheats?
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  Monique DeleonAug 20, 2025
  Your Dolmar Lawn Mower engine may be overheating because the cooling air flow is restricted. Remove any debris from the slots in the shroud, blower housing, and air passages. Another reason could be an incorrect spark plug; install an RC12YC or QC12YC spark plug and ensure the cooling fins are on the engine.
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Jason BryanAug 25, 2025
Why Dolmar Lawn Mower engine operates erratically?
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  Alexis GibsonAug 25, 2025
  If your Dolmar Lawn Mower engine is running erratically, it might be caused by a defective spark plug (refer to ENGINE OWNERS MANUAL for installing a new, correctly gapped plug), an incorrect spark plug gap (set the gap between electrodes at 0.7 to 0.8 mm), or a dirty air cleaner element (refer to ENGINE OWNERS MANUAL for cleaning).
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Thomas DixonAug 28, 2025
How to fix Dolmar PM-46 BC Lawn Mower engine that idles poorly?
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  Christine YoungAug 28, 2025
  A Dolmar Lawn Mower engine that idles poorly may have a dirty air cleaner element (refer to ENGINE OWNERS MANUAL for cleaning instructions). Alternatively, air slots in the engine shroud could be blocked (remove any debris), or the cooling fins and air passages under the engine blower housing might be obstructed (remove any debris).
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jamesbrooksSep 2, 2025
What causes Dolmar PM-46 BC Lawn Mower engine to skip at high speed?
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  Gregory SmithSep 2, 2025
  If your Dolmar Lawn Mower engine skips at high speed, the gap between the spark plug electrodes may be too close. Set the gap between the electrodes at 0.7 to 0.8 mm.

Summary

Symbols Marked on Product

General Safety Rules

Preparation

Safety precautions before operation, including footwear and refueling rules.

Operation

Guidelines for safe operation, including environment, slopes, and wet grass.

Transportation and Handling

Maintenance and Storage

Technical Data

Assembly

Folding Handle

Adjustment for Appropriate Angle

Mounting the Grass Catcher

Height of Cut

3-in-1 Functionality

Operating Instructions

Before Starting

Pre-operation checks including fuel, oil, and safety.

To Start Engine and Engage Blade

Detailed steps for starting the engine and engaging the blade.

Operation Procedures

Guidance on how to operate the lawn mower during use.

To Stop Engine

Safe procedures for stopping the engine and blade.

Connection for Auto Move

Height Adjustment Instructions

Maintenance Instructions

Spark Plug

Lubrication Instructions

Cleaning

Engine Air Cleaner

Cutting Blade

Procedures for blade removal, sharpening, and reinstallation.

Blade Mounting Torque

Storage Instructions (Off Season)

Troubleshooting Guide

Dolmar PM-46 BC Specifications

General

Engine Type	4-stroke
Fuel Tank Capacity	0.8 L
Cutting Width	46 cm
Grass Catcher Volume	60 L
Engine	B&S 500 E series
Displacement	140 cm³
Cutting Height Adjustment	Central