CHP Extra 300S Assembly Manual page 25

Competition series
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INSTALLING THE MOTOR AND IGNITION
The engine thrust line is 2 7/16" down from the top of the firewall. The motor is also
offset ¼" to the right of center when looking at the front of the airplane.
1) Draw the engine thrust lines on the
firewall.
2) Mark the vertical and horizontal
centerlines of your motor on the motor
mount. Hold the motor up to the
firewall and line it up with the lines you
have drawn on the firewall. When in
place, mark the location for the engine
bolts.
2 7/16
1/4"
offset to
the right
25

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