Troy-Bilt TB225 Operation Manual - Page 11

AIR FILTER MAINTENANCE Cleaning the Air Filter Failure to maintain your air filter properly can result in poor performance or can cause permanent damage to your engine. 1. Open the air filter cover by unscrewing the cover screw (Fig. 9). 2. Remove the air filter and the screen that sits behind it (Fig. 9). 3. Wash the filter in detergent and water. Rinse the filter thoroughly and allow it to dry. 4. Apply enough clean SAE 30 motor oil to lightly coat the filter. 5. Squeeze the filter to spread and remove excess oil. 6. Replace the air filter and the screen that sits behind it (Fig. 9). NOTE: Operating the unit without the air filter will VOID the warranty. 7. Reinstall the air filter cover. Insert the hooks on the air filter housing into the slots on the air filter cover (Fig. 10). 8. Swing the air filter cover to the right and align the cover screw with the cover screw hole (Fig. 10). Tighten the cover screw to secure the air filter cover. NOTE: Do not over tighten as this may strip the screw. Air Filter Cover Screen Cover Screw Slots Air Filter Fig. 9 Air Filter Housing Hooks Cover Screw Hole IDLE SPEED ADJUSTMENT WARNING: The tines may turn during idle speed adjustments. Wear protective clothing and observe all safety instructions to prevent serious personal injury. NOTE: Careless adjustments can seriously damage your unit. An authorized service dealer should make carburetor adjustments. If after checking the fuel mixture and cleaning the air filter the engine still will not idle, adjust the idle speed screw as follows: 1. Start the engine and let it run for about 2-3 minutes at a high speed (full throttle) to warm up. Refer to the Starting and Stopping Instructions. NOTE: Ensure the tines are not in contact with the ground when adjusting the idle. 2. Release the throttle control and let the engine idle. If the engine stops, use a small Phillips screwdriver to turn the idle speed screw clockwise, 1/8 of a turn at a time (as needed) until the engine idles smoothly (Fig. 11). NOTE: The tines should not rotate during engine idle. 3. If the tines rotate when the engine idles, turn the idle speed screw counterclockwise 1/8 of a turn at a time (as needed), to reduce idle speed. Checking the fuel mixture, cleaning the air filter, and adjusting the idle speed screw should solve most engine problems. If not and all the following are true: • The engine will not idle • The engine hesitates or stalls on acceleration • There is a loss of engine power Have the carburetor adjusted by an authorized service dealer. Air Filter Cover Idle Speed Screw Fig. 10 Fig. 11 Air Filter Housing 11