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#1
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Welcome to the forum.
What kind of outdrive ie Volvo penta single or duo prop, mercruiser etc. I have 91 V and mine has the Volvo penta duo prop, my rpm is 4200 and mine runs between 41-44mph, per my GPS. At 3000 rpm mine runs between 28-31 mph. Hope this helps.
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Tis better to be quiet and thought a fool than open your mouth and prove it!! 1991 V-20 cuddy I/O 350 volvo duo prop, 1998 15ft Grumman 9.9 Johnson  
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#2
08-08-2013, 08:31 PM
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If you're sure your engine is running the way it's supposed to, then I would look at the prop pitch and dia. as the next place to gain speed. I'm thinking that a 19 to a 21 pitched prop would be about right for 260 horses...depending on what you want your boat to do.
And in all cases, welcome to the site. Glad you found us.
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1987 V20 w/1987 150HP Yamaha on a Shoreland'r Trailer 1978 16.5 Airslot w/1996 120HP Force on a Four Winns trailer 1996 V21 w/1993 200HP Mercury on a Shoreline Trailer All towed by a 5.7L Hemi Durango. If God didn't have a purpose for us we wouldn't be here, so Live simply, Love generously, Care deeply, Speak kindly. (Leave the rest to God) Silence, in the face of evil, is itself evil. Not to speak is to speak, not to act is to act. God will not hold us guiltless.
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