Saito FA-60T, Instruction Manual

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E N G I N E O P E R A T I O N
10
Air out nipple
Air intake nipple
Pressure adjusting valve
Excess pressure outlet
Vent line
fuel mixture by rotating the high
speed needle valve counterclockwise
3 clicks. Lean the left cylinder by
turning the high speed needle valve
clockwise until the rpms begin to
drop. This time, however, richen the
fuel mixture by rotating the high
speed needle valve counterclockwise
3 clicks. The high speed needle
valve adjustments are now
completed.
Idle Needle Valve
Adjustment
1. Lower the throttle of the Saito FA-
300TTDP to the lowest possible idle
while retaining its reliability. Make sure
the carburetor linkage assembly is
secured to prevent movement of the
throttle levers.
2. Lean the right cylinder low speed
mixture screw (turning the screw
clockwise) until the rpms dorp off
slightly. Richen the low speed
mixture by turning the idle screw
1
/
8
to
1
/
4
turn counterclockwise. Lean the
left cylinder low speed mixture screw
(turning the screw clockwise) until
the rpms drop off slightly. Richen the
low speed mixture by turning the idle
screw
1
/
8
to
1
/
4
turn counterclockwise.
Fuel Pump Adjustment
See Figure 6.
Figure 6
FA-300TTDP
1. Begin with the pressure adjusting
valve open 2
3
/
4
turns.
2. start the engine and allow it to
warm up prior to attempting any
adjustments.
3. Advance the engine to full
throttle.
4. Rotate the pressure adjusting valve
in
1
/
4
turn increments--first clockwise
1
/
4
turn (rich) then rotate
counterclockwise 1 /
4
turn (lean) until
the best rpm is achieved. It’s
important to note that the pump
system has a definite response lag.
This lag is approximately 2-5
seconds. With each
1
/
4
turn change of
the pressure adjusting valve, allow
the engine rpm enough time to
stabilize. This will prevent“chasing”
of the correct setting.