Engine keeps on running after ignition is switched off, Mechanical Engineering

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If Engine Keeps on Running after Ignition is Switched Off

Causes of Problem

Remedy

Pre-ignition due to very hot spark plug used

Pre-ignition due to ignition timing too much advanced

High compression ratio in engine cylinder

Excessive carbon deposits in combustion

Cylinder head gasket projecting into the Combustion chamber

Air-fuel mixture too lean

Fit correct type of spark plug

Adjust the ignition timing

Correct

Decarbonise

Replace gasket

Adjust Carburetor

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