LawnMaster NPTGSS2617A - Page 24

24
AIR & FUEL SYSTEM
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H screw counter-clockwise 1/4 turn.
To adjust the carburetor, a tachometer is needed (Fig. 29). When testing the speed, the tachometer
should be placed near the spark plug of the trimmer.
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Keep the trimmer off the ground and away from any objects when making adjustments. Keep all parts
of your body away from the trimmer head.
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engine warms up, run the trimmer at full throttle and bump the trimmer head on the grass or ground
2 to 3 times to advance the cutting line to the correct length. When adjusting the carburetor, the line
has to be at the correct length to be able to check the speed accurately.
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with the carburetor adjustment tool, and observe the RPM displayed on the tachometer to verify
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speed. Then turn the H screw slowly in the correct direction, and observe the RPM displayed on the
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Fig. 28Fig. 27
T Screw
L Screw
H Screw
Fig. 29
rpm
CLOCK SET
A
B
C
D
E F G RESET
21:42