LawnMaster NPTBSP2609A, Руководство по обслуживанию, Страница: 24 / 42

24
AIR & FUEL SYSTEM
■ Remove the carburetor adjustment tool and re-check the max no load speed. Engage and release
the throttle trigger quickly to operate the cutter at full throttle, and observe the RPM displayed on the
tachometer. Make sure the max speed is correct.
■ Adjust the L screw: while the cutter is idling, turn the L screw clockwise using the carburetor
adjustment tool. Observe the RPM displayed on the tachometer until it reaches the max speed (Fig.
31). This max speed could be greater than or less than 4000 RPM.
Fig. 31
CLOCK SET
A B C D
E F G RESET
4650
rpm
CLOCK SET
A B C D
E F G RESET
10800
rpm
Fig. 30
CLOCK SET
A B C D
E F G RESET
3130
rpm
Fig. 32
■ Adjust the T screw:
- If the max speed adjusted in previous step is greater than 4000 RPM, turn the T screw counter-
clockwise using the screwdriver. Observe the RPM
displayed on the tachometer until it reaches about
4000 RPM.
- If the max speed adjusted in previous step is less than
4000 RPM, turn the T screw clockwise using the
screwdriver. Observe the RPM displayed on the
tachometer until it reaches about 4000 RPM.
■ Adjust the L screw: turn the L screw counter-clockwise
using the carburetor adjustment tool. Observe the RPM
displayed on the tachometer until the idle speed reaches about 3000 RPM (Fig. 32).