RCGF 40CC-Twin Operator's Manual page 11

4. Place the propeller on the crankshaft at the one o'clock position.
5. Mark the location of one of the outer holes while the propeller is in the beginning of the
compression stroke position. Use a Dead Center Hole Locator to center and start the
hole.
6. Remove the propeller from the engine and drill the outer hole on the drill press using a
(.110"/ 2.81mm) drill bit as a pilot hole. Next use a 5mm drill bit to finish the hole. In order
to achieve a clean finish on both sides of the propeller, drill only half way through the
propeller with the finishing drill bit. Then flip the propeller over and drill completely
through the hole.