Replacement Part List

ISSUE

PROBLEM

SOLUTION

4. Fouled Spark Plug

▲ Good Compression

▲ Good Fuel Supply

▲ Good Ignition Coil

Carbon and/or dirt around electrodes.

Clean Spark Plug.

Electrode is burned, damaged

seriously, or insulators damaged.

Replace spark plug.

lmproper spark plug gap.

Adjust to proper value.

5. No Spark

▲ Good Compression

▲ Good Fuel Supply

▲ Good Spark Plug

Spark plug cap is damaged.

Replace ignition coil.

lgnition coil damaged.

Replace ignition coil.

Magneto loses magnetism.

Replace ignition coil.

6. Low Compression

▲ Good Fuel Supply

▲ Good Ignition System

Piston rings are overly worn.

Replace piston rings.

Piston rings are sticking.

Clean carbon from cylinder.

Piston rings are broken.

Replace piston rings.

Spark plug is loose or missing the

gasket.

Replace spark plug gasket and

retighten.

Air leaking from below the cylinder

head.

Check cylinder head for

warping, replace gasket, and

torque to listed specifications.

WARNING

● When testing the spark plug, never hold the high-voltage wire with wet hands.

● Fuel vapor is flammable, keep away from sparks and open flame.