Maintenance Instructions BRIGGS & STRATTON TIPS35IMPORTANT TIPS FOR CARE OF THEBRIGGS & STRATTON ENGINEFuel System• Fuel must be clean - free from water, dirt, and or-ganic material.• Clean the fuel filter on a regular basis and whencontamination is suspected or found in the fuel.Starting• Start engine with the throttle advanced off idle(1/4 to 1/2 throttle). This will aid starting, especiallyin cold weather.• Keep the battery fully charged.• Match crankcase oil viscosity to the ambient tem-perature, allowing the engine to crank faster andstart easier.• Allow engine to run at idle for a few seconds be-fore stopping engine to avoid run-on or backfiring.Cooling System• Keep engine air intake screen and cylinder headfins free of grass clippings, chaff, and dirt. Inspectintake screen and cooling fins for cleanliness anddamage.• Operate the engine at full speed when mowing.This will allow the engine to produce full horsepowerand move more cooling air through the engine cool-ing fins.Air Cleaner• Use only Briggs & Stratton air cleaner elements.Aftermarket elements may not seal in the air cleanerhousing, allowing dirt to enter the engine. Also, af-termarket filters often skimp on the filtration mediaand require more frequent cleaning and replace-ment.• DO NOT overservice or frequently “disturb” theair filter. A dirty air filter actually cleans better thana new one. Changing and cleaning the filter too of-ten can actually reduce filter efficiency and increasethe opportunity for traces of dust to enter the engine.Wait until the element really needs servicing as indi-cated by the loss of engine power.• When the air filter element is removed or re-placed, make sure all dust is cleaned out of the aircleaner body. Use a damp cloth and wipe the inte-rior of the air cleaner body clean (a little dirt left herewill be sucked into the engine and reduce enginelife). When the filter is reinstalled, make sure the el-ement is held tight and straight in the air cleanerbody for proper seating and sealing.Oil• Single viscosity or multi-viscosity oils may beused with the viscosity matching ambient tempera-tures for the engine operating conditions. This willaid starting in cold weather and assure proper lu-brication in hot weather.• Use only Briggs & Stratton oil filters. Aftermarketfilters may not seal properly and/or have the in-correct pressure relief valve for proper lubrication.