Carburetor Adjustment - Troy-Bilt TB26TB Manuel De L'utilisateur

Air Filter
Air Filter Cover
Tab
Fig. 27
NOTE: It may be necessary to
remove the fuel cap to
completely remove the air filter
cover.
2. Remove the air filter (Fig. 27).
3. Wash the filter in detergent and
water (Fig. 28). Rinse the filter
thoroughly and allow it to dry.
4. Apply enough clean SAE 30
motor oil to lightly coat the filter
(Fig. 29).
5. Squeeze the filter to spread
and remove excess oil (Fig. 30).
Fig. 29
6. Replace the filter
Back Plate
(Fig. 31).
NOTE: If the unit is
operated without
the air filter, you
will VOID the
Slots
warranty.
7. Reinstall the air
filter cover.
Position the
hooks on the left
side of the air
filter cover into
the slots at the left side of the back plate (Fig. 31).
NOTE: It may be necessary to remove the fuel cap to reinstall
the air filter cover.
8. Swing the cover to the right until the tab on the air filter
cover snaps into place in the slot on the back plate (Fig. 32).
9. Replace the fuel cap if it was removed.
MAINTENANCE AND REPAIR INSTRUCTIONS
Fig. 28
Fig. 30
Back Plate Slot
Fig. 31
10
Air Filter
Air Filter
Cover
Tab
Fig. 32

CARBURETOR ADJUSTMENT

The idle speed of the engine is adjustable. An idle adjustment
screw is reached though a hole in the top of the engine cover
(Fig. 33).
NOTE: Careless
adjustments can
seriously damage your
unit. An authorized
service dealer should
make carburetor
adjustments.
Check Fuel
Old fuel is usually the
reason for improper unit
performance. Drain and
refill the tank with fresh fuel
prior to making any adjustments. Refer to Oil and Fuel
Information (p. 5).
Clean Air Filter
The condition of the air filter is important to the operation of the
unit. A dirty air filter will restrict air flow. This is often mistaken
for an out of adjustment carburetor. Check the condition of the
air filter before adjusting the idle speed screw. Refer to Air
Filter Maintenance (p. 9).
Adjust Idle Speed Screw
WARNING:
To prevent serious personal injury,
make sure the cutting attachment has stopped
rotating before you turn it off and set it down.
If, after checking the fuel 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 at a high idle for a minute to
warm up. Refer to Starting/Stopping Instructions (p. 6).
2. Release the throttle trigger and let the engine idle. If the
engine stops, insert a small phillips into the hole in the air
filter/muffler cover (Fig. 33). Turn the idle speed screw in,
clockwise, 1/8 of a turn at a time (as needed) until the engine
idles smoothly.
NOTE: The cutting attachment should not rotate when the
engine idles.
3. If the cutting attachment rotates when the engine idles, turn
the idle speed screw counterclockwise 1/8 of a turn at a
time (as needed), to reduce idle speed.
WARNING:
The cutting attachment may spin during
idle speed adjustments. Wear protective clothing and
observe all safety instructions to prevent serious
personal injury.
Idle Adjustment Screw
Fig. 33