Ryobi Outdoor 510r manual Replacing the Spark Plug, Spark Arrestor Maintenance

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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. 33).

0.025 in.

(0.655 mm.)

Fig. 33

CAUTION: Do not sand blast, scrape, or clean electrodes. Grit in the engine could damage the cylinder.

4.Install a correctly gapped 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.

SPARK ARRESTOR MAINTENANCE

1.Remove the muffler cover. See Rocker Arm Clearance, Pg. 16.

2.With a flat blade screwdriver or Torx T20 bit, remove the screw attaching the spark arrestor cover to the muffler (Fig. 34).

Muffler

Spark Arrestor Screen

Tab Screw

Spark Arrestor Cover

Slot

Fig. 34

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

4-Cycle Oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 181786 Oil Fill Plug / Dipstick . . . . . . . . . . . . . . . . . . . . . 182378 Spark Plug . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 180852 Spark Arrestor Screen . . . . . . . . . . . . . . . . . . . . . 180890 Fuel Cap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 182271 Tine (Left Outer or Right Inner) . . . . . . . . . . . . . . .147471 Tine (Right Outer or Left Inner) . . . . . . . . . . . . . . .147472 Clevis Pin with Clip . . . . . . . . . . . . . . . . . . . . . . .147473

These replacement parts can be purchased from your local authorized dealer.

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Contents OPERATOR’S Manual Table of Contents IntroductionCalifornia Emission Regulations Spark ArrestorSymbol Meaning Rules for Safe OperationFor Service INFORMATION, Call Safety and International SymbolsSymbolmeaning Safety Alert Symbol Wear EYE and Hearing ProtectionOIL Symbolmeaning Keep Bystanders Away PrimerUnleaded Fuel Thrown Objects can Cause Severe Injury ON/OFF Stop ControlKnow Your Unit ApplicationInstalling the Wheel Bracket Assembly Assembly InstructionsAdjusting the Handlebar Height Assembling the UnitRecommended OIL Type Using Blended FuelsOIL and Fuel Information Recommended Fuel TypeFueling Unit Using Fuel AdditivesSTARTING/STOPPING Instructions Starting InstructionsStopping Instructions Engine Re-Start Warm Engine With FuelAdjusting Tine Depth Operating InstructionsOperating Tips Frequency Maintenance Required Refer to Maintenance and Repair InstructionsMaintenance Schedule Tine Removal and ReplacementChecking the OIL Level Changing the OILAIR Filter Maintenance Cleaning the Air FilterAdjust Idle Speed Screw Carburetor AdjustmentClean Air Filter Rocker ARM ClearanceRemove the rocker arm cover and gasket Spark Arrestor Maintenance ACCESSORIES/REPLACEMENT PartsReplacing the Spark Plug Cleaning and Storage Troubleshooting U S E T I O NSpecifications EnginePage Owners Warranty Responsibilities Manufacturers Warranty CoverageLimited TWO-YEAR Warranty REV. B