Ryobi 766r Replacing the Spark Plug, ACCESSORIES/REPLACEMENT Parts, 110-120 in.lb .3-13.5 Nm, 020

MAINTENANCE AND REPAIR INSTRUCTIONS

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

20