Ryobi 825r manual Rocker Arms Adjusting Nuts Feeler Gauge Gasket

Page 23

MAINTENANCE AND REPAIR INSTRUCTIONS

9.Slide the feeler gauge between the rocker arm and the valve return spring. Measure the clearance between the valve stem and rocker arm (Fig 42). Do both intake and exhaust valves.

Rocker Arms	Adjusting Nuts

Feeler Gauge

Gasket

Fig. 42

The recommended clearance for both intake and exhaust is .003 – .006 in. (.076 – 0.152 mm). Use a standard automotive .005 in. (0.127 mm) feeler gauge. The feeler gauge should slide between the rocker arm and valve stem with a slight amount of resistance, without binding (Fig. 43).

Adjusting Nut

Rocker Arm

.003–.006 in.

(.076–0.152 mm)

Feeler Gauge

Valve Stem

Fig. 43

10.If the clearance is not within specification:

a.Turn the adjusting nut using a 5/16 inch (8 mm) wrench or nut driver (Fig. 42).

•To increase clearance, turn the adjusting nut counterclockwise.

•To decrease clearance, turn the adjusting nut clockwise.

b.Recheck both clearances, and adjust as necessary.

11.Reinstall the rocker arm cover using a new gasket. Torque the screw to 20–30 in•lb (2.2–3.4 N•m).

NOTE: A rocker arm cover gasket, Part # 182099 can be purchased from your local authorized dealer.

12.Reinstall the engine cover. Check alignment of the cover before tightening the screws. Tighten screws.

13.Replace the muffler cover. Slip the long tabs on the muffler cover into the engine cover. Slide the notches on the side of the muffler cover over the tabs on the engine cover and snap into place (Fig. 38).

14.Check the spark plug and reinstall. See Replacing the Spark Plug.

15.Replace the spark plug wire.

23

Image 23

Contents OPERATOR’S Manual Introduction Table of ContentsSpark Arrestor California Emission RegulationsBefore Operating Symbol MeaningSafety Warnings for GAS Trimmers Rules for Safe OperationWhile Operating Other Safety WarningsUnleaded Fuel Safety and International SymbolsSymbolmeaning Safety Alert Symbol For Service INFORMATION, CallSharp Blade Choke Control ON/OFF Stop ControlHOT Surface Warning See list of add-ons on Other optional accessories may be used with the 825rApplications Decorative trimming around trees, fences, etcAdjusting the J-HANDLE Assembly InstructionsAdding OIL to Crankcase Initial USE OIL and Fuel InformationRecommended OIL Type Fueling Unit Using Blended FuelsUsing Fuel Additives Recommended Fuel TypeCold Start First Start of the Day or Engine Ran Out of Fuel STARTING/STOPPING InstructionsStarting Instructions Stopping InstructionsRemoving the Cutting Attachment or Add-Ons Installing the Cutting Attachment or Add-OnsOperating Instructions Operating the CLICK-LINKSYSTEMTips for Best Trimming Results Adjusting Trimming Line LengthHolding the Trimmer Decorative Trimming Maintenance and Repair InstructionsMaintenance Schedule Frequency Maintenance Required Refer toWinding the Inner Reel With New Line Line Installation for the SpeedspoolReleasing the Inner Reel Installing a Prewound ReelCleaning the Speedspool Speedspool Replacement PartsChanging the OIL Checking the OIL LevelCleaning the Air Filter AIR Filter MaintenanceCheck Fuel Carburetor AdjustmentClean Air Filter Adjust Idle Speed ScrewRemove the rocker arm cover and gasket Rocker ARM ClearanceRocker Arms Adjusting Nuts Feeler Gauge Gasket Replacing the Spark Plug Spark Arrestor MaintenanceACCESSORIES/REPLACEMENT Parts Long Term Storage Cleaning and StorageCleaning StorageT I O N TroubleshootingU S E Engine SpecificationsPage Manufacturers Warranty Coverage Owners Warranty ResponsibilitiesREV. a OPERATOR’S Manual Part no