MAINTENANCE
PB-770 H/T
40
X7531125807
© 01/2020 ECHO Incorporated
3.
Check idle speed and reset if
necessary. If a tachometer is
available, idle speed screw (A)
should be set to the
specifications found on
“Specifications” Page of this
manual. Turn idle screw (A)
clockwise to increase idle speed;
counter clockwise to decrease
idle speed.
Throttle Cable Adjustment (PB-770T only)
Level 1.
If engine idle speed changes when blower pipe is moved, or engine will not
reach full wide open throttle speed, adjust throttle cable.
1.
Loosen handle adjustment knob
(C) and tilt Tube Throttle handle
forward to expose Adjustment
Screw (D).
2.
Turn Adjustment Screw until
Throttle Trigger free play is
4 - 6 mm (3/16-1/4 in.).
3.
After adjustment, squeeze and
release Throttle Trigger several
times to verify Carburetor
Throttle Shaft has full range of
movement from idle to wide open
throttle positions.
A
C
D
4-6 mm
