How fast should my boat go?

[bold123]

I bought a new palm beach 205 whitecap. With the motor it weighs 2800 lbs. With 3 people and 40 gallons of fuel ( an extra 800 lbs - 3600 lbs total) it goes 27 knots (31 mph) full throttle (5800 rpm). At 4800 rpm it goes 20-21 knots (23 mph). It has a 140 hp suzuki outboard and a 18 pitch stainless prop. The hull deadrise is 21 degrees. Are these reasonable speeds or does this indicate poor setup?

 

[LubeDude]

Re: How fast should my boat go?

<br /><br />I presume this is what you have.<br /><br />You may be at your max. Where is your cavitation plate in reference to your bottom, Is that with full trim or can you trim to the max without porposing?

 

[Solittle]

Re: How fast should my boat go?

How are you measuring the speed?

 

[SeaHorse]

Re: How fast should my boat go?

WOT = 31.548 mph if it is a deep V, 35.46 mph if it is flatter and quite optimized. You are fairly close to what you can expect.

 

[mattttt25]

Re: How fast should my boat go?

it sounds a bit slow to me, but every boat/motor combination is different. i run a 20' center console with the same approx weight and a 150hp johnson. per gps, i run 42 mph at wot.<br /><br />solittle asks the most important question. if these are not gps speeds, no one can help you.

 

[bold123]

Re: How fast should my boat go?

I'm not sure what height the cavitation plate is at since I haven't had it out of the water yet - my trailer isn't ready. My speeds were all measured via GPS.

 

[bold123]

Re: How fast should my boat go?

Originally posted by SeaHorse:<br /> WOT = 31.548 mph if it is a deep V, 35.46 mph if it is flatter and quite optimized. You are fairly close to what you can expect.

What is considered a deep V?

 

[phatmanmike]

Re: How fast should my boat go?

boat speed calculator puts it at 35mph, with ZERO prop slippage and perfect water...31 seems about all youll really get with that motor<br /><br />i have a 115hp on my 16 footer and can hit 60 on a good day

 

[DJ]

Re: How fast should my boat go?

2800# is a good load for a 140.<br /><br />Maximize your set up looking at engine height.

 

[phatmanmike]

Re: How fast should my boat go?

that setup would give you 40.24 mph, not too bad, eh