Distorted valve guides Sticking Valves

PRIMARY MAINTENANCE

Generally, wash foam-type filters in a dishwashing detergent and water solution. Rinse and wring dry, then saturate with oil and squeeze out excess. Failure to re-oil this type filter will ruin the engine.

Clean paper elements by tapping lightly. Blowing with air will rupture paper elements.

Use a flashlight to detect clogged or torn paper elements – replace if damaged in any way.

Dirt can also be introduced into an engine in dirty fuel from a contaminated container. Always use clean fresh fuel from a clean

container to guard against dirt, sludge and water contamination.

Be aware that fuel

breaks down in storage and forms gummy compounds

which will block carburetor passages. Never use fuel more than 3 months old. Drain tank then run the engine out of fuel before storing during the off-season.

Air is also needed to keep your engine cool. Dirt, dust & debris build up restricts and clogs cooling air intake screens and fins. Clean screens and fins at frequent intervals. The engine blower housing and shrouds should be removed at least once each season or more often under dry, dusty conditions for a thorough cleaning of fins.

Failure to keep external surfaces clean not only presents fire hazards, but causes overheating and resulting engine damages such as:

1.Distorted valve guides.

2.Sticking Valves.

3.Scuffed, scored cylinder walls.

4.Over-speeding.

5.Loss of power.

6.Complete failure of engine.

An engine must also have proper lubrication. All engines use some oil. On 4-cycle engine,

CHECK OIL LEVEL BEFORE EACH START-UP. Wipe area clean around the oil check plug or dipstick opening to keep dirt from falling into the engine when checking the oil. Always check with the machine on a level surface. On engines with dipstick, keep the level up to, but not over, the FULL mark. When adding oil, allow time for all of the oil to flow down the fill tube to prevent a false full reading when the level could actually be low and result in engine damage.