Honda WW150HV 2018 Owner's Manual page 91

Disconnect the spark plug cap from the
5.
spark plug.
Clean any dirt from around the spark plug
6.
base.
Remove the spark plug using provided
7.
spark plug wrench.
Spark plug wrench
P. 82
2
10 × 14 mm Open
end wrench
Spark plug cap
Spark Plug
Install the new spark plug. With the plug
8.
washer attached, thread the spark plug in
by hand to prevent cross-threading.
Tighten the spark plug:
9.
Installing a new plug, tighten it twice
●
to prevent loosening:
a) First, tighten the plug:
1/2 turn after it seats.
b) Then loosen the plug.
c) Next, tighten the plug again:
1/8 turn after it seats.
NOTICE
An improperly tightened spark plug can damage
the engine. If a plug is too loose, a piston may be
damaged. If a plug is too tight, the threads may
be damaged.
Changing Spark Plug
u
Continued 87