Craftsman 247.116830 Operator's Manual

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14SERVICE AND MAINTENANCE5. After the spark plug is seated, tighten with a spark plug wrench to compressthe washer.NOTE: When installing a new spark plug, tighten 1⁄2-turn after the sparkplug seats to compress the washer. When reinstalling a used spark plug,tighten 1⁄8- to 1⁄4-turn after the spark plug seats to compress the washer.CAUTIONThe spark plug must be tightened securely. A loose spark plug can becomevery hot and can damage the engine.Cleaning the EngineIf the engine has been running, allow it to cool for at least half an hour beforecleaning. Periodically remove dirt build-up from engine. Before servicing theengine, remove the carburetor cover and/or blower housing. Clean the dirt anddebris from the following areas:CAUTIONDo not spray the engine with water to clean it because the water couldcontaminate the fuel. Using a garden hose or pressure washing equipmentcan also force water into the muffler opening. Water that passes throughthe muffler can enter the cylinder and cause damage.• Cooling Fins• Air Intake Screen or Recoil Starter/Flywheel Guard Areas• Spark Plug Connection• Levers• Linkage Area• Guards• Carburetor• Engine HeadRemoving debris will insure adequate cooling, correct engine speed and reduce therisk of fire.WARNINGAccumulation of debris around the muffler could cause a fire. Inspect andclean before every use.LubricationLubricate the pivot points on the control handle and the extension spring at the endof the control cable with a light oil once every season and before the snow throweris put into storage at the end of the season.AdjustmentsShave PlateTo check the adjustment of the shave plate, place the machine on a level surface.The wheels, shave plate and auger paddles should all contact the level surface.Note that if the shave plate is adjusted too high, snow may blow under the augerhousing. If the shave plate wears out excessively, or the snow thrower does notself-propel, the shave plate may be too low to the ground and needs to be adjusted.NOTE: On new snow throwers or machines with a new shave plate installed,the auger paddles may be slightly off the ground.To adjust the shave plate proceed as follows:1. Run the snow thrower until the fuel tank is empty.2. Pull the starter cord until resistance is felt. Then tip the snow thrower backuntil it rests on the handles. To ensure that the snow thrower does not tipforward, it may be necessary to secure the handle to the ground with a blockor other object.3. Loosen the four flange lock nuts and carriage screws which secure the shaveplate to the housing. See Figure 14. Move the shave plate to the appropriateposition and retighten the nuts and screws securely.Side ViewLock NutScrewReversible Shave PlateFigure 144. Tip the snow thrower back to the operating position and pull the starterhandle a few times to see if it is difficult to pull.5. If the starter is difficult to pull, remove the spark plug and pull the handleseveral times to ensure that any oil trapped in the engine head is removed.CAUTIONOil may come out of the spark plug hole when it is removed and the starterhandle is pulled.6. Inspect the spark plug. If it is wet, clean off any oil before re-installing.