Replacing a foam air filter
A Briggs & Stratton genuine foam filter element is designed to properly fit your engine and will keep dust particles from getting into your engine.
Your foam filter requires replacement every 3 months or after 25 hours of use, whichever occurs first, more often under dusty conditions.
How To Change a Foam Air Filter:
1. Remove air filter screw.
2. Carefully remove air filter assembly and discard foam.
3. Clean all metal air filter assembly parts.
4. Saturate new foam filter with fresh engine oil.
5. Wrap foam in clean cloth and squeeze to remove excess oil.
6. Assemble foam filter so lip extends over edge of air filter body.
7. Reinstall air filter assembly carburetor.
How it works
The foam only style air filter system works by trapping dirt and debris through the use of motor oil spread throughout the oil foam holding medium. A dry or non-oiled oil foam filter will trap only the largest particles. If the air filter element is foam only, it MUST be oiled and serviced regularly.
Changing oil, tips for better engine maintenance
For optimum performance, you should change the oil in your small engine at least once per season, or every 25 hours of use.
Step 1: Getting Started
Start the engine and run it until it is warm. Stop the engine. WARNING: Be sure to disconnect the spark plug wire, and secure it away from the spark plug to prevent accidental starting. Clean around the oil fill and drain plug area to prevent dirt and debris from falling into the crankcase (see photo above). Remove the dipstick, if equipped.
Step 2: Draining the Oil
Tilt the mower deck with the air filter or spark plug side up, and position some newspaper and an oil pan or jug beneath the mower. Use a 3/8" drive socket wrench and extension (no socket) to turn the plug counter clockwise (see photo above), allowing the old oil to drain. If the plug also serves as a fill cap (normally yellow or white in color), it may have two prongs so you can loosen it by hand or with a screwdriver or hex key for additional torque.
Replace the drain plug by twisting clockwise and tightening with a box wrench or adjustable wrench. If your engine does not have an oil filter, skip this step.
Step 3: Fill With New Oil
Pour in the correct amount and approved type of oil for your engine, based on your operators manual. If you have two oil fill plugs (normally yellow or white in color) on each side of the engine, either one can be used to fill the engine with oil to the correct level. Please DO NOT fill the engine with oil without using the correct measuring device as illustrated in your operators manual.
To optimize engine performance, use Warranty Certified Briggs & Stratton Small Engine Oil. Briggs & Stratton offers a Synthetic 5W-30 oil that provides the best protection at all temperatures as well as improved starting with less oil consumption.
For optimum performance, you should change the oil in your small engine after the first five hours of use and then, every 50 hours of use:
Use Briggs & Stratton SAE 30W Oil above 40°F (4°C) for all of our engines.
Check oil level regularly.
Air-cooled engines burn about an ounce of oil per cylinder, per hour.
Fill to mark on dipstick. DO NOT OVERFILL
Change oil after first 5 hours of use, then after every 50 hours or at the beginning of the season.