17
model YW2500 | contact us: 1.866.523.5218
Fig. 20
0.025 in.
(0.635 mm)
MAINTAINING THE SPARK PLUG
1. Stop the engine and allow it to cool. Grasp the spark plug boot
firmly and pull it from the spark plug.
2. Clean around the spark plug. Remove the spark plug from the
cylinder head with a 5/8-inch socket, turning counterclockwise.
3. Inspect the spark plug. If the spark plug is cracked, fouled or
dirty, replace it with replacement part
#753-06193
, a
Champion
RDJ7J
or an equivalent spark plug.
4. Use a feeler gauge to set the air gap at
0.025 in. (0.635 mm)
(Fig. 20).
5. Install the spark plug in the cylinder head. Tighten the spark plug
with a 5/8-inch socket, turning it clockwise until snug.
NOTE:
If using a torque wrench, torque to:
110-120 in.•lb. (12.3-13.5 N•m). Do not over tighten.
6. Reattach the spark plug boot.
WARNING:
Do not sand blast, scrape or clean spark plug
electrodes. Grit in the engine could damage the cylinder.
Maintenance
