Originally Posted by Ian Sharlot
First numbers are just a part no, last 2 numbers will tell you the pitch of the prop.
Don't be ridiculous! by you reckoning the part # 48-825868L85 would mean an 85" pitch 3 blade tempest! I don't think so. In a lot of cases, the last 2 digits is the size and type of hub. For instance, A46 is a 1" std flow torque, A56 is a 1" solid flow torque, and A65 is a 1 1/4" HD solid hub.
The part # on a merc prop is just a part #, and unfortunately you'll need a catalogue to look it up. Let me know the number, and I'll look it up for you.