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TOPIC: Prop size for 3055

Prop size for 3055 14 Feb 2017 20:40 #1

  • TPONZ
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I need to replace my props but dont really want to get the boat lifted out of the water just to get the specs off of the existing props.

I have twin 250hp 5.7s with bravo 2 is there a standard prop size for this boat ? Thanks

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1999 3055 Twin 5.7 Mercruisers & Bravo ll

Prop size for 3055 14 Feb 2017 21:23 #2

  • SprinterX
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see my sig

18" diameter, 23" pitch

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Sea Venture
2000 3055, 5.7/B2, 18x23" props
Cruising the PNW and beyond.
DIYC, Riverhouse Marina
MMSI 316029971

Kirk :)
Drinks well with others. ;)
Last Edit: by SprinterX.

Prop size for 3055 15 Feb 2017 10:45 #3

  • RGrew176
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They must have made later model props a little bit bigger. My 99 3055 had 17 1/2" dia props same 23 pitch. The boat IMO performed flawlessly with those props.

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Rick Grew

1981 Carver 3007 Aft Cabin

2004 Past Commodore
West River Yacht & Cruising Club
www.wrycc.com

Prop size for 3055 15 Feb 2017 12:42 #4

  • dmcb
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You should not rely on someone else's prop size. Each boat is different and the wrong one could damage your engines.
You should be sure your bottom is clean and the engines in good tune. They go for a brief wot (wide open throttle) ride. Your rpms should be in the suggested engine rom specifications as set by the engine mfg.
While some props may result in a faster boat, if the engines don't reach the proper wot rpms, you could be lugging the engine. If over propped you are lugging at any speed, not just wot. This will damage your engine.
As you see in the couple of posts here, prop size differs. Also because of normal use, each boat is different because of the weight usually carried. All this effects the prop size.
One size doesn't fit all.
Doug

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Started boating 1955
Number of boats owned 32
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2850
3870 presently owned
Favorite boat. Toss up. 46' Chris Craft, 3870 Bayliner

Prop size for 3055 16 Feb 2017 02:41 #5

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Thanks Doug,

Not sure where to go from here then, maybe i will have to lift her out to double check what on it now.
Its only used in fresh water and 99% of the time its just the two of us on board.
Its definitely slow out of the water to get on the plane.
I had intended getting a couple of props from the US as they are so expensive here, Long way to come if they are not right.
Steve

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1999 3055 Twin 5.7 Mercruisers & Bravo ll

Prop size for 3055 16 Feb 2017 07:35 #6

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Based on my experience with my 3055 the 23 pitch props seem to give this boat the best performance. 17 1/2" or 18" diameter probably does not make that big a difference. My 3055 topped out at 45 mph at WOT and running 4800 RPM at WOT. Twin 5.7's with carburetors.

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Rick Grew

1981 Carver 3007 Aft Cabin

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West River Yacht & Cruising Club
www.wrycc.com

Prop size for 3055 16 Feb 2017 11:57 #7

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TPONZ wrote: Thanks Doug,

Not sure where to go from here then, maybe i will have to lift her out to double check what on it now.
Its only used in fresh water and 99% of the time its just the two of us on board.
Its definitely slow out of the water to get on the plane.
I had intended getting a couple of props from the US as they are so expensive here, Long way to come if they are not right.
Steve

Steve, your statement begs another question. Has it always been slow getting on plane? If not and something has changed have you damaged your props?
I ask because it sounds more like a dirty bottom (growth on it) than props.
A boat left in the water, fresh or salt, needs to have the bottom cleaned. I suspect this hasn't been done. Do not underestimate how much difference this will make.
Doug

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Started boating 1955
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2655
2755
2850
3870 presently owned
Favorite boat. Toss up. 46' Chris Craft, 3870 Bayliner

Prop size for 3055 17 Feb 2017 08:44 #8

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When I owned my 3055 I never had a problem climbing up on plane. I would push the throttles all the way forward. Watching the tach's when they hit 3000 RPM I was on plane and would throttle back to whatever cruising speed I wanted to use that particular trip.

A dirty bottom would cause problems getting up on plane.

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Rick Grew

1981 Carver 3007 Aft Cabin

2004 Past Commodore
West River Yacht & Cruising Club
www.wrycc.com

Prop size for 3055 17 Feb 2017 17:18 #9

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RGrew176 wrote: When I owned my 3055 I never had a problem climbing up on plane. I would push the throttles all the way forward. Watching the tach's when they hit 3000 RPM I was on plane and would throttle back to whatever cruising speed I wanted to use that particular trip.


Same here except I start with the tabs all the way down, then once up on plane I raise them to get the best trim based on my fuel flow indications.

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Sea Venture
2000 3055, 5.7/B2, 18x23" props
Cruising the PNW and beyond.
DIYC, Riverhouse Marina
MMSI 316029971

Kirk :)
Drinks well with others. ;)
Last Edit: by SprinterX.

Prop size for 3055 17 Feb 2017 18:55 #10

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The dirty bottom, I have to confess that I had not considered that theory, It was last anti-fouled back in 2013 but while swimming around the boat thought it looked quite clean underneath. With regards to prop damage, one does have a slight nick out of it which I sanded smooth. It is my intension to replace the props anyway.
I was going to replace with more of the same alloy props although was told yesterday that a prop with 23 p needs to be in stainless as in alloy it would not be strong enough too much flex apparently, It would be very interested to get
some of your thoughts on that.

Cheers

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1999 3055 Twin 5.7 Mercruisers & Bravo ll
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