After Break-In - Saito FA-90R3 Instruction Manual

10
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17. After break-in:

If a test stand was used for the
break-in procedure, the engine
may now be mounted on the air-
craft using the integral motor
mount and mounting hardware
supplied with the Saito engine.
N : Always utilize the engine's
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mounting spacers. Place the
mounting spacer between the inte-
gral motor mount and the firewall
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 lev-
els found in the Saito multi-cylin-
der engines.(See Figure 6 Above)
The idle needle valve (89) can
now be fine tuned. Please refer to
the Low Speed Caeburetor
Adjustments Section on this page
for information on how to do this.
The valves can be checked at this
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ARBURETOR
Figure 6
DJUSTMENTS
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.
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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.
N : The fuel mixture is too
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rich when you open the throttle
rapidly and the engine emits white
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ARBURETOR