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Posting a reply to: Re: motor upgrade

Muskie Fishing -> Muskie Boats and Motors

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HomeTime

Posted 7/21/2011 7:22 AM (#508210 - in reply to #507975)
Subject: Re: motor upgrade

Posts: 247

Location: Uxbridge Ontario

How heavy is the boat?

I have an 07 75hp Optimax and its stock prop is an aluminum 12-1/2" diameter 19P. It ran out to 5900rpm at about 40-41mph (light load). I now run a 13" diameter 19P SS prop with much better holeshot and the prop holds the water much better cornering running 5800rpm and about 39-40mph. I need to raise the motor one hole I think.

Who does your current engine do for rpm?

I went through a similar choice a while back. I almost switched from my 75 opti to a 90 opti to max the hp on my boat (06 Lund 1750 Outfitter SS) and the dealer I was going to buy the engine from talked me out of it saying the minimal gains will not really justify the additional expense. The only thing the switch would have gained was a newer warranty.