Changing a Paper Filter

• 1). Disconnect the spark plug wire. Be sure that the engine is completely cool.
  
  
• 2). Locate the air filter canister. On newer models, it is usually on either side of the engine. Older engines feature top-mounted canisters directly fastened to the carburetor.
  
  
• 3). Loosen the air filter canister's cover screw by turning it counterclockwise using the appropriate screwdriver. Pull the hinged cover down. The screw is permanently retained in the cover.
  
  
• 4). Remove the old air filter cartridge from the canister. Wipe the interior of the canister clean using a paper shop towel.
  
  
• 5). Install the new cartridge with the paper pleat side facing out toward you.
  
  
• 6). Shut the canister cover and tighten the screw clockwise with the screwdriver.
  
  
• 7). Replace the spark plug wire.
  
  

Changing a Foam Filter

• 1). Repeat Steps 1 and 2 for changing a paper filter.
  
  
• 2). Remove the air filter housing cap screw with a screwdriver. Turn the screw counterclockwise. Pull the screw straight up and lift the cap off from the housing.
  
  
• 3). Pull the old foam air filter out from the filter housing.
  
  
• 4). Clean the inside of the air filter housing and cap with a paper shop towel.
  
  
• 5). Saturate the replacement foam filter using new engine oil. Cover the filter with a clean cotton cloth and squeeze the cloth to remove any excess oil.
  
  
• 6). Install the foam air filter into the housing. Be sure that the lip of the filter extends over the edge of the housing.
  
  
• 7). Install the housing with the new filter onto the carburetor. Replace the cap and screw. Tighten the screw clockwise to secure the cap and housing.
  
  
• 8). Replace the spark plug wire.