Saito FA-60T Instruction Manual page 12

10
E N G I N E O P E R A T I O N
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 drop off
slightly. Richen the low speed
mixture by turning the idle screw
1 /
to turn counterclockwise. Lean the
4
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
1 / 1 /
screw to turn counterclockwise.
8 4
Fuel Pump Adjustment
See Figure 6.
Air out nipple
Air intake nipple
Pressure adjusting valve
Excess pressure outlet
Figure 6 FA-300TTDP
1. Begin with the pressure adjusting
3 /
valve open 2 turns.
4
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
1 /
1 /
8
in turn increments—first clockwise
4
1 /
turn (rich) then rotate
4
1 /
counterclockwise
4
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
the pressure adjusting valve, allow
the engine rpm enough time to
stabilize. This will prevent "chasing"
of the correct setting.
Vent line
turn (lean) until
1 /
turn change of
4