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Hello, I just bought a 26ft champion boat with what I think…

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Hello, I just bought a...
Hello, I just bought a 26ft champion boat with what I think is a volvo penta aqd 32a diesel in it it has a 270 drive, we took it out today for a spin and it olny does 7knots at 2700 rpm it tacks out at 3200 at 8knots does this sound right what is max rpm on this motor? The prop that is on it I can make out Michigan and pr a 3 and a 9 is the prop mabe to big? or is it a V8 gear case. Thanks Joe
Submitted: 8 years ago.Category: Boat
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Answered in 1 day by:
6/28/2010
Marine Mechanic: K. Kergan, Marine Mechanic replied 8 years ago
K. Kergan
K. Kergan, Marine Mechanic
Category: Boat
Satisfied Customers: 1,031
Experience: 24 yrs exp. Inboard/Outboard mechanic Mercury/ Mercruiser, Volvo Penta and OMC, Johnson/Evin.
Verified
This engine should turn 4350 RPM unloaded and around 3900 in gear, you get about 200 RPM increase with 1" less pitch. I am not familiar with the Michigan numbering system, a dealer could tell you what pitch you have. I would think you need 3 or 4 inches less pitch. You could have the wrong ratio if you are already at a very low pitch, next step is to find out what pitch you have and if you can reduce by several inches of pitch that will take care of it.
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K. Kergan
K. Kergan
K. Kergan, Marine Mechanic
Category: Boat
Satisfied Customers: 1,031
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Experience: 24 yrs exp. Inboard/Outboard mechanic Mercury/ Mercruiser, Volvo Penta and OMC, Johnson/Evin.

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