25
S
HRED
'N' V
AC
®
O
PERATOR
'
S
M
ANUAL
Final Adjustment
IMPORTANT
Limiter caps prevent exceeding C.A.R.B. and E.P.A. emission limits
and over rich adjustment, but not over lean adjustment, which can
cause engine failure: Do not exceed recommended HI speed engine
R.P.M. during operation, or for long periods during adjustment.
1. Start engine, run at idle for one minute.
2. Complete warm up by running at full throttle for 5 minutes,
operating choke twice to clear air from carburetor chambers.
3. Run at idle and accelerate to check for smooth transition from idle
to high speed; if engine hesitates, turn LO speed screw (B)
counterclockwise 1/8th of a turn at a time until acceleration is
smooth.
4. Adjust idle screw (A) to 2500-3000 R.P.M., using tachometer.
A
B
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