Old Michigan Prop numbers

[Speakrdude]

Hey All. Does anyone have access to "older" Michigan Wheel part number guide?

The reason I ask is because I am trying out a different prop that came off another 1984 Bayliner 2750, (Volvo 280) and the numbers stamped in the prop don't make any sense on their website.

The numbers on the props center hub are Mich 032 013 and stamped on the outside at the base of one of the blades is M926.

I previously posted that I was getting only 4000 RPM's at WOT with a 15x19 prop. So I am trying a few others. If my suspisions are correct, the above Michigan #'s are 15x17 because now I can get 4200 RPM's (with a 25MPH head wind).

I have checked my timing at WOT (using the Thunderbolt IV now) and it is 30 degrees with absolutley no ping.

Jim

 

[Speakrdude]

Re: Old Michigan Prop numbers

Welll, after some extensive research, I have come to the conclusion that the "stamped" numbers on the hub should read 082013 not as stated above. That makes much more sense. 15x19LH Aluminum.

So whats the general opinion on the correct prop pitch for the above boat? 15x19 or should I find and try a 15x17?

Jim

 

[Don S]

Re: Old Michigan Prop numbers

Moving to the Prop Questions and Topics forum.