Great Planes Cirrus SR22 .46-55 ARF - GPMA1363 - Manual (Page 16)

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3. Use epoxy to securely glue the motor box together.
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4. Attach the motor box to the fi rewall with four 6-32 x
5/8" [16mm] socket head cap screws, #6 fl at washers and
#6 lock washers. Be sure to apply a drop of thread locker to
the threads of the cap screws.
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5. Assemble the motor following the instructions included
with the motor. Attach the motor to the motor box with four
6-32 x 1/2" [13mm] socket head cap screws, #6 fl at
washers and #6 lock washers. Be sure to apply a drop of
thread locker to the threads of the cap screws. Note: First
insert all four cap screws in the motor X-mount before
threading them into the motor box.
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6. Use three #4 x 3/8" [9.5mm] sheet metal screws to
install the ECS to the bottom plate of the motor box. Harden
the screw holes with thin CA.