9 - TROUBLESHOOTING THE ENGINE

PROBLEM

Unit won’t start or starts but will not run.

Unit starts, but engine has low power.

Engine hesitates.

No power under load.

Runs erratically.

Smokes excessively.

PROBABLE CAUSE

Incorrect starting procedures.

Incorrect carburetor mixture adjustment setting.

Fouled spark plug

Fuel filter plugged.

Incorrect lever position on choke.

Dirty spark arrester screen.

Dirty air filter.

Incorrect carburetor mixture adjustment setting.

Incorrect carburetor mixture adjustment setting.

Incorrectly gapped spark plug.

Incorrect carburetor mixture adjustment setting.

Incorrect fuel mixture.

CORRECTIVE ACTION

Follow instructions in the User Manual.

Have carburetor adjusted by an Authorized Service Center.

Clean / gap or replace plug.

Replace fuel filter.

Move to RUN position.

Replace spark arrester screen.

Remove, clean and reinstall filter.

Have carburetor adjusted by an Authorized Service Center.

Have carburetor adjusted by an Authorized Service Center.

Clean / gap or replace plug.

Have carburetor adjusted by an Authorized Service Center.

Use properly mixed fuel (40:1 mixture).

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Yard Machines MTD1840AVCC, MTD1640NAVCC manual Troubleshooting the Engine, Problem

MTD1640NAVCC, MTD1840AVCC specifications

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