Replacement Part List

ManualsBrandsDuromax ManualsEngines & Engine Parts18-HP 440cc 1 in. Shaft 4-Stroke Overhead Valve Portable Electric Start Engine

ISSUE

PROBLEM

SOLUTION

Engine Stalls when

running.

Ignition

system

Spark plug is damaged or

dirty.

Replace the spark plug.

Spark plug electrode is

damaged.

Replace the spark plug and

remove any debris from the

engine.

Spark plug cap is loose or

damaged.

Inspect and replace or connect

spark plug cap.

Engine oil is low.

Add engine oil to the upper

level mark.

Spark plug wire is damaged

or broken.

Replace ignition coil complete.

Stop switch wire is shorted

to the engine block.

Inspect stop switch wire and

repair or replace.

Other

Valve guide(s) is damaged

or worn.

Repair or replace valve

guide(s).

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