Honda HRS216PKA Manual page 41

MAINTENANCE
8. SPARK PLUG INSPECTION
Recommended spark plug
Using an incorrect spark plug can cause engine damage. Use
the recommended spark plug or an exact equivalent.
1. Remove the spark plug with a 13/16 in (21 mm) spark plug
wrench.
2. Visually inspect the spark plug. Discard the plug if the
insulator is cracked or chipped.
3. Measure the plug gap with a wire-type gauge. If
necessary, adjust the gap by bending the side electrode.
Spark plug gap
4. Make sure the sealing washer is in good condition and replace if
necessary.
5. Install the plug finger-tight to seat the washer, then tighten with a plug
wrench to compress the sealing washer:
Torque: 20 N•m (14 ft-lb)
Tighten a new plug 1/2 turn after the plug seats.
Tighten a reused plug 1/8 ~ 1/4 turn after the plug seats.
NOTICE
A loose spark plug can overheat and damage the engine.
Overtightening can damage the threads in the cylinder
head.
9. SPARK ARRESTER CLEANING
(OPTIONAL PART)
The spark arrester must be serviced every 100 hours to
keep it functioning as designed. Allow the engine to cool
before proceeding.
1. Remove the three flange bolts from the muffler
protector.
2. Remove the 4 x 6 mm self-tapping screw from the
spark arrester, and remove the spark arrester from
the muffler. Be careful not to damage the spark
arrester screen.
3. Check for carbon deposits around the exhaust port
and spark arrester. Clean with a wire brush, if
necessary. Replace the spark arrester if there are
any breaks or tears.
4. Install the spark arrester and muffler protector in the
reverse order of disassembly.
3-8
NGK BPR5ES
0.7 ~ 0.8 mm (0.028 ~ 0.031 in)
HRS216PKA • HRS216SKA • HRS216VKA
SPARK PLUG
SEALING
WASHER
FLANGE BOLT (3)
HEAT SHIELD
SPARK PLUG CAP
0.028 ~ 0.031 in
(0.7 ~ 0.8 mm)
SETSCREW
SPARK ARRESTER