Briggs & Stratton 273521, 271172, 270962, CE8069, 276535 manual Combustion Chamber, Air Filter

Combustion Chamber

Remove combustion chamber deposits every 500 hours or whenever the cylinder head is removed.

With the piston at Top Dead Center (TDC), scrape deposits from top of piston and upper bore with a plastic scraper.

Remove the loosened deposits from around the top ring land area using compressed air or a shop vacuum and a soft bristle brush.

NOTICE: Use care to prevent debris from entering push rod or oil return cavities in cylinder. Do not damage bore, top of piston, cylinder head, or cylinder head gasket surfaces.

It is not necessary to remove the discoloration marks on the piston, valves, and/or cylinder head. These marks are normal and will not affect engine operation.

Air Filter

A correctly serviced air filter protects internal engine parts from airborne dirt and dust. Poor filter maintenance will allow dirt and dust to be drawn into the engine, causing wear to the intake system and contamination of the oil. Dirt in the oil forms an abrasive mixture which wears down moving parts.

NOTE: Snow engines do not have an air cleaner assembly. Please refer to Snow Hood Maintenance for disassembly procedures

WARNING

Gasoline and its vapors are extremely flammable and explosive.

Fire or explosion can cause severe burns or death.

•Never start or run the engine with the air cleaner assembly or the air filter removed.

NOTE: Do not use pressurized air or solvents to clean the filter. Pressurized air can damage the filter and solvents will dissolve the filter.

1. Disassemble air cleaner system.

2.Gently tap air filter cartridge on a hard surface to loosen debris. Replace cartridge if very dirty.

3.Wash foam filters and pre-cleaners in warm, soapy water, then rinse and allow to air dry. Saturate foam filters in clean

	engine oil, then squeeze out access oil.
	DO NOT OIL PRE-CLEANERS.	1
4.	Drain and clean oil bath reservoirs, then
	re-fill with clean engine oil.
5.	Reassemble the air cleaner system.

Figures 5 through 16 illustrate the various air cleaner systems found on Briggs & Stratton single-cylinder OHV engines.

Figure 5

Figure 6

11