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Posting a reply to: Re: 25 Mercury 2 stroke Vs. 2008 20 HP Yamaha 4 stroke

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hi


You are replying to:
VMS
Posted 7/12/2011 6:44 PM (#506865 - in reply to #506704)
Subject: Re: 25 Mercury 2 stroke Vs. 2008 20 HP Yamaha 4 stroke





Posts: 3508


Location: Elk River, Minnesota		Hiya,

Couple of things come to mind.. Given shaft length is correct, I would not be surprised at that much of a change. Going down 5 hp is a 20% reduction in power, along with going to a motor that is what I would assume to be another 60 pounds heavier than your two stroke.. If the motor is not propped correctly as esoxfly stated, and is over or under pitched, that will only exascerbate the problem...

Lots of variables here...

Steve

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