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tblrklakemo 02-13-2009 08:01 PM


Originally Posted by DMOORE (Post 2799812)
I heard the opposite. Black is flywheel, blue is prop.


Darrell.

Black is most certainly crank hp.

We know 525's are more like 540ish at the crank and 500 at the prop.

shawn 02-14-2009 01:32 PM

Then why is my HP500 470 HP at the prop?

tblrklakemo 02-14-2009 01:48 PM


Originally Posted by shawn (Post 2800202)
Then why is my HP500 470 HP at the prop?

bc its more like 515-520 at the crank

Griff 02-14-2009 01:52 PM

How Merc rates HP, whether its at the prop or crank has changed several times and varies depending on year and engine.


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