Snapper Essential Parts Diagram and Spark Plug Replacement Guide for Lawn Mowers

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Regular Maintenance

Replace Spark Plug

Service Interval: Yearly

Spark Plug Gap: .030” (.76mm)

Replacement Spark Plug

Resistor Spark Plug, Champion RC12YC

1. Stop the engine and allow it to cool.

2. See Figures 31or 32. Clean the area around the spark plug.

3. Remove the spark plug.

4. Check the spark plug gap. It should be .030” (see Figure 31or 32).

5. Reinstall the plug into the cylinder head. Torque the plug to 180 in. lbs (20 N.m.).

Figure 32. Spark Plug Gapping

Figure 31. Spark Plug Gapping

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Contents 20HP Hydro Tractors 18.5HP Hydro Tractors Mower Decks22HP Hydro Tractors 1730214Page Table of Contents Safety Rules & Information Operating Safety Slope Operation Safety Rules and InformationGeneral Operation Safety Rules & InformationIgnition System Safe Handling of Gasoline Service & MaintenanceCE Identification Tag Markings Identification NumbersNorth American CE ModelsSafety Icons Safety DecalsSafety Decals Decals Locations CE Safety IconsThrottle Control Control FunctionsChoke HeadlightsFeatures & Controls Parking Brake Function Volt Power OutletCruise Control Operation HourmeterOperational Safety Checks General Operating SafetyAdding Fuel Starting The EngineOperating the Tractor Installing the Mower Deck Mower Deck Removal & InstallationRemoving the Mower Deck Muffler and surrounding areas may be hotStorage Adjusting Mower Cutting HeightAttaching a Trailer Before Every Spring Each Hours 100 250 Fall Use Check Tire PressuresBefore Every Spring Each Hours 100 Fall Use SizeSafety Interlock System Check Regular MaintenancePTO Clutch Adjustment Check Engine Maintenance Battery MaintenanceHood Removal and Installation Transmission MaintenanceK46 Maintenance Transmission IdentificationLubrication Service Interval Every 25 HoursOil GreaseLubricate Rear Axle Shafts Service Interval YearlyServicing the Mower Blades Service Interval Every 100 Hours or As RequiredCheck & Fill Engine Oil Closed ValveOpen Pre-Cleaner Service Air Filter Removal & InstallationAir Filter Service Air FilterBriggs & Stratton Single Cylinder Models Replace Spark Plug Troubleshooting Troubleshooting Adjustment, & ServiceTroubleshooting the Mower Seat Adjustment Troubleshooting, Adjustment, & ServiceBattery Charging Brake AdjustmentAdjust PTO Clutch Window Adjustment Nut Feeler Gauge PTO clutch adjustmentGauge Wheels Select Models Fuse ReplacementMower Adjustments 1/2 Max High cut Leveling The MowerTo avoid damaging belts, do not PRY Mower Belt Replacement20 HP* Briggs & Stratton 22 HP* Briggs & Stratton LT SeriesK46 18.5 HP* Briggs & StrattonTechnical Manuals Replacement PartsMaintenance Items