I need some help. Does anyone know the correct drill bit ( or a prop reamer) for this engine. The hub of the engine is larger than the threads (by alot). I am assuming it is a metric size but all i have are sae bits and i dont want to buy a complete set of larger metric bits just to drill my props and spinners. From what i can tell it is somewhere between 25/64 and 13/32.

Thanks!

10mm

You should really invest in a prop reamer. It's only a fewbucks, and will do any metric hole from 7-10mm. It's too easy for a drill to go in crooked or off center. Here's what I use. http://www3.towerhobbies.com/cgi-bin...?&I=LXEGH6&P=7

Thank you both for the replies. I have ordered the prop reamer. Its guys like you that make this hobby enjoyable! Thanks again!

Rod

You will love the prop reamer in the link above. It is a true reamer.