Ryobi 705r, 725r manual Replacing the Spark Plug, ACCESSORIES/REPLACEMENT Parts, 020

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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 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. 36).

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 by turning the socket clockwise until snug. Do not over tighten. Torque to 110-120 in.•lb. (12.3-13.5 N•m).

ACCESSORIES/REPLACEMENT PARTS

2-Cycle Oil . . . . . . . . . . . . . . . . . . . . . . . . 147543

Spark Plug . . . . . . . . . . . . . . . . . . . . . . . . 610311

Replacement Line . . . . . . . . . . . . . . . . . . 181472

Replacement Line Cartridge . . . . . . . . . . . 181460

Inner Reel Spring . . . . . . . . . . . . . . . . . . . 181465

Bump Head Knob Assembly . . . . . . . . . . . 181468

Fuel Cap. . . . . . . . . . . . . . . . . . . . . . . . . . 180000

Shoulder Strap . . . . . . . . . . . . . . . . . . . . . 682075

0.020 in

(0.5 mm)

Fig. 36

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Contents OPERATOR’S Manual Introduction Table of ContentsSpark Arrestor California Emission RegulationsSymbol Meaning Safety Warnings for GAS TrimmersRules for Safe Operation Before OperatingWhile Operating Safety and International Symbols Other Safety WarningsSymbol Meaning Safety Alert Symbol For Service INFORMATION, CallSharp Blade Do not USE Blades Indicates OIL HOT Surface WarningChoke Control Full Choke position Partial Choke positionKnow Your Unit Handle 705r Harware Shaft HousingApplication Cutting AttachmentAssembly Instructions Installing and Adjusting the D-HANDLE Model 705rInstalling and Adjusting the J-HANDLE Model 725r Decal Installing the Cutting Attachment ShieldModel 725r Screw Cutting Attachment ShieldUsing Fuel Additives Using Blended FuelsOIL and Fuel Information OIL and Fuel Mixing InstructionsSTARTING/STOPPING Instructions Starting InstructionsStopping Instructions Operating the CLICK-LINK Operating InstructionsModel 705r Model 725r Holding the Trimmer Adjusting Trimming Line LengthMaintenance Schedule Maintenance and Repair InstructionsFrequency Maintenance Required Refer to Tips for Best Trimming ResultsWinding the Inner Reel With New Line Line Installation for the SpeedspoolCleaning the SpeedSpool Installing a Prewound Inner reelReleasing the Inner Reel Bump Knob Foam Seal Spring Inner ReelReinstalling the Airfilter/Muffler Cover AIR FILTER/MUFFLER Cover Removal and InstallationRemoving the Air Filter/Muffler Cover Shaft PlungerAir Filter AIR Filter MaintenanceClean Air Filter Carburetor AdjustmentAdjust Idle Speed Screw Check Fuel MixtureACCESSORIES/REPLACEMENT Parts Replacing the Spark Plug020 Cleaning Cleaning and StorageStorage Long Term StorageProblem Cause Action TroubleshootingSpecifications EngineDrive Shaft & String Head Owners Warranty Responsibilities Ryobi Outdoor Products Limited TWO-YEAR WarrantyRyobi Canada INC Save These Instructions for Future Reference