Troy-Bilt TB25CE Operator's Manual page 18

MAINTAINING THE AIR FILTER
Failure to maintain the air filter can result in poor performance or
can cause permanent damage to the engine. Engine failure due to
improper air filter maintenance is not covered by the product warranty.
Cleaning the Air Filter
1. Open the air filter cover: Hook your fingers behind the cover tab.
To unlock the air filter cover, pull it to the left and away from the
engine. This may require a firm pull. Swing the air filter cover to
the right (Fig. 27).
2. Remove the air filter from inside the air filter cover (Fig. 27).
3. Wash the air filter in detergent and water. Rinse the air filter
thoroughly and allow it to dry.
4. Lightly coat the air filter with clean SAE 30 oil.
5. Squeeze the air filter to spread and remove excess oil.
6. Reinstall the air filter inside the air filter cover (Fig. 27).
NOTE: Operating the unit without the air filter and air filter cover will
VOID the warranty.
7. Close the air filter cover: swing the air filter cover to the left and
press it closed until the lock tab snaps into place (Fig. 27).
ADJUSTING THE IDLE SPEED
WARNING:
The cutting head (or blade) may spin during
idle speed adjustments. Wear protective clothing and
observe all safety instructions to prevent serious personal
injury.
If the engine will not idle properly:
1. Start the engine. Refer to Starting and Stopping.
2. Release the throttle control and let the engine idle.
NOTE: Make sure the choke lever is NOT engaged while adjusting
the idle speed.
• If the engine stops, increase the idle speed. Use a small
Phillips screwdriver to turn the idle speed screw clockwise,
1/8 of a turn at a time, until the engine idles smoothly (Fig. 28).
• If the cutting head (or blade) spins when the engine idles,
reduce the idle speed. Turn the idle speed screw
counterclockwise, 1/8 of a turn at a time, until the cutting head
(or blade) stops moving (Fig. 28).
Air Filter
Lock Tab
Idle Speed Screw
18
Cover Tab
Air Filter Cover
Fig. 27
Fig. 28