14
MAN-88 – UK
5-TILLOTSON HS-323A CARBURETTOR ADJUSTEMENT
LEAN
1 T.O.
*
RICHE
¾
T.O. 1
¼
T.O.
*
T.O. = TURNS OPEN
1
½
T.O.
Normally the correct setting of the mixture screws, after engine run-in, is the following:
§
L (close the screw completely and then open): 1 T.O. +
½
(1 turn and 30’)
§
H (close the screw completely and then open):
½
T.O. (30’)
Based on various factors as altitude, ambient temperature etc. It might be
necessary to reset the carburettor to optimize the performance of the engine.
ATTENTION:
- Never lean too much as lean mixture will overheat engine and cause seizure.
- The adjustment of the High screw is must do it with more care. Step by step to minute of
adjustment because is very sensible and a changes engine behavior very fast.
- Do not force H or L closed. It may damage the precision machined orifice and render the carb.
unserviceable.
- The adjustment of screw must be performed with warm engine.
( H
)
HIGH SPEED FUEL
MIXTURE
REGIMI
( L )
LOW SPEED FUEL
MIXTUREREGIMI
( I )
TROTTLE SPEED
SCREW
