Installing The Throttle; Mounting The Cowl - Phoenix Model Extra 300S Instruction Manual

INSTALLING THE THROTTLE

1. Install one adjustable metal connector through
the third hole out from the center of one servo
arm, enlarge the hole in the servo arm using a
2mm drill bit to accommodate the servo
connector. Remove the excess material from
the arm.
!
After installing the adjustable metal connector
apply a small drop of thin C/A to the bottom
nut. This will prevent the connector from
loosening during flight.
2. Plug the throttle servo into the receiver and turn
on the radio system. Check to ensure that the
throttle servo output shaft is moving in the
correct direction. When the throttle stick is
moved forward from idle to full throttle, the
throttle barrel should also open and close using
this motion. If not, reverse the direction of the
servo, using the transmitter.
3. Slide the adjustable metal connector / servo
arm assembly over the plain end of the
pushrod wire. Position the throttle stick and the
throttle trim at their lowest positions.
4. Manually push the carburator barrel fully
closed. Angle the arm back about 45 degree
from center and attach the servo arm onto the
servo. With the carburator barrel fully closed,
tighte the set screw in the adjustable metal
connector.
5. Remove the excess throttle pushrod wire using
wire cutters and install the servo arm retaining
screw.

MOUNTING THE COWL

1. Remove the muffler and needle valve assembly
from the engine. Slide the fiberglass cowl over
the engine.
2. Measure and mark the locations to be cut out
for engine head clearance, needle valve,
muffler. Remove the cowl and make these
cutouts using a rotary tool with a cutting disc
and a rotary sanding drum attachment.
Throttle servo
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3. Slide the cowl back into place. Align the front of
the cowl with the crankshaft of the engine. The
front of the cowl should be positioned so the
crankshaft is in the middle of the precut
opening. Hold the cowl firmly in place using
several pieces of masking tape.
4. While holding the cowl firmly in position, drill
four 1,6mm pilot holes through both the cowl
and the side edges of the firewall.
5. Using a 3mm drill bit, enlarge the four holes in
the cowling.
!
Enlarging the holes through the cowl will prevent
the fiberglass from splitting when the mounting
screws are installed.
6. Slide the cowl back over the engine and secure it
in place using four 3mm x 12mm wood screws.
7. Install the muffler. Connect the fuel and pressure
lines to the carburator, muffler and fuel filler
valve. Tighten the screws completely.
Secure the cowl
Cowl area cutout
for proper airflow
to carburetor.
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