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Piper J-3 Cub Assembly Manual

Piper J-3 Cub Assembly Manual

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ENGINE & FUEL TANK INSTALLATION<br />

❐ Install the throttle push-rod tube through the firewall and into the<br />

radio compartment. (Photo 62)<br />

Photo 62<br />

❐ Remove the engine and drill a 5/64” (2mm) hole at each of the<br />

marks. (Photo 65)<br />

Photo 65<br />

❐ Leave approximately 1/4” of the push-rod tube extending into the<br />

engine compartment. Epoxy in place. (Photo 63)<br />

Photo 63<br />

❐ Secure the engine to the motor mount using the 4 M3x20 self-tapping<br />

screws provided. Secure the adjustable engine mount at this time<br />

and make sure there is 2-degree right thrust angle. (Photo 66)<br />

Photo 66<br />

❐ Place the engine on the adjustable motor mount and locate the<br />

front drive hub 4-13/16” from the firewall. Mark the mounting hole<br />

locations on the motor mount. (Photo 64)<br />

Photo 64<br />

❐ If installing the recommended Thunder Tiger F-54S engine, extend<br />

the choke valve wire insuring that it is long enough to clear the cowling.<br />

(Photo 67)<br />

Photo 67<br />

15

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