Prop pitch suggestion on 232 Gulfstream

Wholelottalove

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I recently bought a 2001 233 Gulfstream, during the sea trial with a 2003 225 Yamaha 4 stroke max speed was 30 at 5,800 rpm. Does anyone have the same setup ? Looking to buy a new prop, 15 pitch. Think it will make a difference ?
 

Sparkdog118

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There are lots of styles for propellers. Some have bow lift, some designed to not cavitate etc. here is a Yamaha link that may help.
Sounds like you need bow lift prop, or your motor is too low on the transom. My 24 offshore gets 48 mph at 5900 with 2005 f250 Yamaha. I run a 21 pitch oem Yamaha saltwater series 2 prop. Promotes bow lift. Tried many. Other 21 pitch props I was running 43mph but bow was plowing. Lifted the bow and walla I was flying.
 

Sparkdog118

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This is for a 228 seafarer with same motor.
 

seasick

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A few things come to mind:
Since you didn't say what the current prop size and pitch is, it is difficult to know if it may be incorrectly sized or if there is another problem.


The Gulfstream is a heavy hull for its length mainly due to the fact that is is a foot wider than most hulls in its length category.
Newer year Gulfstreams are rated for 400 horsepower. The F225 in my opinion is probably somewhat underpowered.
Factors like load, hull condition, prop spec and condition can all affect performance. How did you measure the speed and are you sure it was MPH and not knots?

Here is a thread posted a while back wit the same question

 

atmatthews1

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I recently bought a 2001 233 Gulfstream, during the sea trial with a 2003 225 Yamaha 4 stroke max speed was 30 at 5,800 rpm. Does anyone have the same setup ? Looking to buy a new prop, 15 pitch. Think it will make a difference ?
I've got a '95 Gulfstream 232. Recently repowered w/ twin Suzuki 175s. Props are SS 3x16x20. WOT with people and gear on board = 46 MPH. Agree that 225 ponies on a 232 is underpowered. Mine is rated for 350hp, which is why i went w/ the 2x175.