MAINTENANCE AND REPAIR INSTRUCTIONS
REPLACING THE SPARK PLUG
Use only genuine Ryobi spark plugs. The correct air gap is 0.025 in. (0.655 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 the cap from the spark plug.
2.Clean dirt from around the spark plug. Remove the spark plug from the cylinder head by turning counterclockwise using a 5/8 inch deep socket.
3.Replace cracked, fouled or dirty spark plug. Set the air gap at 0.025 in. (0.655 mm) using a feeler gauge (Fig. 55).
0.025 in.
(0.655 mm.)
Fig. 55
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 inch deep socket clockwise until snug.
If using a torque wrench torque to;
SPARK ARRESTOR MAINTENANCE
1.Remove the muffler cover. See Rocker Arm Clearance, Pg. 22.
2.With a flat blade screwdriver or Torx T20 bit, remove the screw attaching the spark arrestor cover to the muffler (Fig. 56).
Muffler | Spark Arrestor Screen |
Tab Screw
Spark Arrestor Cover
Slot
Fig. 56
3.Pull the tab on the spark arrestor cover out of the muffler. Remove the spark arrestor cover.
4.Remove the spark arrestor screen from the spark arrestor cover.
5.Clean the spark arrestor screen with a wire brush, or replace.
6.Reinstall the spark arrestor screen, spark arrestor cover, and screw.
ACCESSORIES/REPLACEMENT PARTS
Oil Fill Plug / Dipstick . . . . . . . . . . . . . . . . . . . . . 182378
Spark Plug . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 180852
Spark Arrestor Screen . . . . . . . . . . . . . . . . . . . . . 180890
Replacement Line . . . . . . . . . . . . . . . . . . . . . . . . 612454
Replacement Line Cartridge . . . . . . . . . . . . . . . . 147345
Inner Reel Spring . . . . . . . . . . . . . . . . . . . . . . . . 610636
Outer Spool . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 683301
Inner Reel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147495
Bump Knob™ . . . . . . . . . . . . . . . . . . . . . . . . . . . 180814
Fuel Cap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 181083
Shoulder Harness . . . . . . . . . . . . . . . . . . . . . . . . 682075
These replacement parts can be purchased from your local authorized dealer.
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