Ryobi 766r - Manual (Page 20)

MAINTENANCE AND REPAIR INSTRUCTIONS
20
REPLACING THE SPARK PLUG
Use a Champion RDJ7Y spark plug
(or equivalent). The correct air gap is 0.020 in.
(0.5 mm.). Remove the plug after every 50 hours
of operation and check its condition.
1. Stop the engine and allow it to cool. Grasp
the plug wire firmly and pull it from the spark
plug.
2. Clean dirt from around the spark plug.
Remove the spark plug from the cylinder
head by turning a 5/8 in. socket
counterclockwise.
3. Replace cracked, fouled or dirty spark plug.
Set the air gap at 0.020 in. (0.5 mm.) using a
feeler gauge (Fig. 27).
CAUTION: Do not sand blast,
scrape, or clean electrodes. Grit in
the engine could damage the
cylinder.
4. Install a correctly gaped spark plug in the
cylinder head. Tighten by turning the 5/8 in.
socket clockwise until snug.
If using a torque wrench torque to;
110-120 in.•lb. (12.3-13.5 N•m).
Do not over tighten.
ACCESSORIES/REPLACEMENT
PARTS
2-Cycle Oil . . . . . . . . . . . . . . . . . . . . . . . . 147543
Spark Plug . . . . . . . . . . . . . . . . . . . . . . . . 610311
Replacement Line . . . . . . . . . . . . . . . . . . 610375
Replacement Line Cartridge . . . . . . . . . . . 153577
Inner Reel Spring . . . . . . . . . . . . . . . . . . . 610317
Bump Head Knob Assembly . . . . . . . . . . . 153066
Head Assembly . . . . . . . . . . . . . . . . . . . . 180897
Fuel Cap. . . . . . . . . . . . . . . . . . . . . . . . . . 180000
Shoulder Strap . . . . . . . . . . . . . . . . . . . . . 682075
0.020 in.
(0.5 mm.)
Fig. 27