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-   -   How much change 1.81 to 1.65? (https://www.offshoreonly.com/forums/drives-lower-units/207166-how-much-change-1-81-1-65-a.html)

offshorefisher 04-18-2009 05:44 PM

How much change 1.81 to 1.65?
 
Just found a deal on a pair of 1.65 Bravo 2 X drives. How much will dropping down from my 1.81s change my wot rpm and how much will I have to prop down? Thanks for any input.

hoozeyurdaddy 04-19-2009 10:31 AM

what pitch and rpm are you running with the 1.81's ???
what are you getting for speed.???
if you can tell us these #'s we could give you an Idea.
Larry

offshorefisher 04-19-2009 11:15 AM


Originally Posted by hoozeyurdaddy (Post 2847531)
what pitch and rpm are you running with the 1.81's ???
what are you getting for speed.???
if you can tell us these #'s we could give you an Idea.
Larry

Getting about 26knots with the 1.81s at 3400rpms with heavy cupped 21pitch three blade ss Powertechs.
Thanks guys.


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