User Guide

SERVICING YOUR LAWN MOWER

4. Measure the spark plug electrode gap with a suitable gauge. The

gap should be 0.028 ~ 0.031 in (0.7 ~ 0.8 mm). Correct the gap, if

necessary, by carefully bending the side electrode.

5. Install the spark plug carefully,

by hand, to avoid cross-

threading.

6. After the spark plug seats,

tighten with a 13/16 in (21 mm)

spark plug wrench to compress

the washer.

If reinstalling the old spark plug,

tighten 1/8 to 1/4 turn after the

spark plug seats.

If installing a new spark plug,

tighten 1/2 turn after the spark

plug seats to compress the washer.

NOTICE

A loose spark plug can overheat and damage the engine.

Overtightening the spark plug can damage the threads in the

cylinder head.

7. Install the spark plug cap on the spark plug.

0.028 ~ 0.031 in

(0.7 ~ 0.8 mm)

SEALING

WASHER