Echo PB-2155 Operator's Manual page 19

Adjusters
Idle Speed Adjuster (T)
Low Speed Mixture Adjuster (L)
High Speed Mixture Adjuster (H) Controls amount of fuel at full
Before Adjustment
Check that:
- Spark arrestor screen and exhaust port are free of carbon
- Blower pipes are installed
Initial Adjustment
2. Turn L adjuster midway between stops.
then turn three turns clockwise.
Final Adjustment
IMPORTANT
Limiter caps prevent exceeding emission limits and over rich
gine failure: Do not exceed recommended high speed engine rev
ating choke twice to clear air from carburettor chambers.
3. Run at idle and accelerate to check for smooth transition from idle
1/8 turn at a time until acceleration is smooth.
NOTE
tributor or dealer.
Control throttle opening at idle.
Controls amount of fuel at low
speed and supplementary fuel for
smooth progression from idle to
high speed.
throttle
-
P
OWER
O '
PERATOR
H
T
-
-
B
LOWER
19
M
S ANUAL
L