Hangar 9 35% Extra 300 ARF (3 Boxes) - Manual (Page 20)

20 35% Extra 300 ARF Assembly Manual
 4. Mount the throttle servo so that the servo output shaft
is closer to the front of the engine. Mark the mounting holes
and drill the holes using a pin vise.
 5. To harden the mounting walls in the wood, install the
servo screws and back them out. Then apply thin CA into the
holes. Once CA is dry install the servo. The pictures below
show this process sequentially.
 6. Prepare the throttle servo linkage by attaching the ball
links to the ends. Note the ball link should be mounted below
the servo arm as pictured.
 7. Slightly enlarge DA throttle arm hole by drilling with
3/32-inch and then 7/64-inch drill bits to accept the 4-40 ball
link.
 8. Install the throttle linkage to the engine throttle arm.