the mounting spacer between the
integral motor mount and the fire-
wall of the aircraft. The spacers
will minimize firewall depression
and serve to reinforce the mount.
Soft mounting of Saito engines is
not required due to low vibration
levels found in the Saito multi-
cylinder engines.
The idle needle valve (89) can
now be fine tuned. Please refer to
the low speed Carburetor
Adjustments Section on this page
for information on how to do this.
The valves can be checked at this
time. Refer to the Engine
Maintenance Section on page 12
for information on the valve
adjustment. The use of a tachome-
ter is encouraged for setting the
high-speed needle valve (85) prior
to flight. The peak rpm should be
obtained and then reduced by
approximately 200 -300 rpm by
turning the high speed needle
valve counterclockwise.
L
OW
S
PEED
C
ARBURETOR
A
DJUSTMENTS
The low speed, or idle needle
valve (89), is pre-adjusted at the
factory for best performance dur-
ing break-in. After break-in it may
be necessary to “fine tune” the
low speed adjustment using the
following procedure:
1. Start the engine and let it warm
up prior to attempting any adjust-
ments.
2. Close the throttle slowly and
adjust the low speed setting by
rotating the needle valve (89)
clockwise to lean the mixture and
counterclockwise to richen
the mixture.
NOTE: The fuel mixture is too
rich when you open the throttle
rapidly and the engine emits white
smoke and “stutters” or “stumbles.”
Correct this by rotating the idle
needle valve clockwise 1/4 to 1/2
turn at a time until the engine
transitions smoothly without hesi-
tation upon opening the throttle
10
L
OW
S
PEED
C
ARBURETOR
A
DJUSTMENTS
Saito manual doc 11/12/01 2:11 PM Page 10
