evinrude prop size?

[mrc283]

aight i kinda lost my prop(long story) anyways, i need to know what size to get. its a 1977 85hp evinrude, thanks

 

[Tacklewasher]

Re: evinrude prop size?

Size is 13 1/4, 13 spline. What pitch is a whole different question.

What did you have before and how did it perform? What was the max speed and RPM?

 

[walleyehed]

Re: evinrude prop size?

If it was an OEM OMC, yes, the 13 spline hub, but diameter can range from 12-3/4 to 14" on this engine.
13.25 diam would be a 17P, 13 diam is 19P and 13-3/4 is a 15P
The 14" diam can be 13-19P.
What boat do you have?

 

[mrc283]

Re: evinrude prop size?

its a 1977 hurst 15ft bass boat.

 

[Randybeall]

Re: evinrude prop size?

You have a problem if that is all the information you have. The only way reasonable from there is to find a prop supplier who will allow you to try multiple props until you find the correct match. I would take a WAG at a 13 x19 based on the power and boat description as a starting point. You will need to run Wide Open Throttle tests to find out if the engine reaches rated rpm with each prop you try.