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MAINTENANCE AND REPAIR INSTRUCTIONS
24
ACCESSORIES/REPLACEMENT PARTS
4-Cycle Oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 181786
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
Click-Link Coupler . . . . . . . . . . . . . . . . . . . . . . . 181616
These replacement parts can be purchased from your
local authorized dealer.
0.025 in.
(0.655 mm.)
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).
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;
110-120 in.•lb. (12.3-13.5 N•m).
Do not over tighten.
Fig. 56
Muffler
Spark Arrestor Screen
Spark Arrestor Cover
Screw
Tab
Slot
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).
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.