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Need some advice on a pontoon boat prop. I have a 2015
Hi! Need some advice on a pontoon boat prop. I have a 2015 sylvan s3 pontoon with a 150 mercury 4 stroke engine. My wot is 4300 with a 3 blade aluminum 15.25 x15 prop. max speed 29 MPH. I know the max… read more
Charles
Charles
Marine Mechanic
Certified Mercury Tech
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I have a 2000 Hewes Bonefisher 18 powered by a 1999 Yamaha
I have a 2000 Hewes Bonefisher 18 powered by a 1999 Yamaha 130. WOT is 4700 rpm and hole shot is poor. Thinking it is the prop which is a 3 blade SS 13.25x19. The prop is probably ten years old, decen… read more
Ted G.
Ted G.
Rigger, Diagnostician
Vocational, Technical or Trade Scho
1,074 satisfied customers
I have a 2006 350 MPI Mercruiser Sterndrive with a Bravo III
I have a 2006 350 MPI Mercruiser Sterndrive with a Bravo III prop. Its the stock standard engine in a Cruisecraft Executive 700 (Australian) boat and runs a 20 degree pitch SS prop. The engine starts … read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
18,955 satisfied customers
35 silverton sedan cruiser, 351 Cummins Diesel fuel range in
35 silverton sedan cruiser, 351 Cummins Diesel fuel range in gal per hour for cruise and max speed… read more
Jason
Jason
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Vocational, Technical or Trade School
18,955 satisfied customers
Good evening, I have a 2002 Silverton 352 with twin Mercruiser
Good evening, I have a 2002 Silverton 352 with twin Mercruiser 8.1 Horizons. 370 hours. Boat runs excellent. Port engine lately will not achieve rpm over 3700. Starboard will WOT at 4150. The throttle… read more
Ted G.
Ted G.
Rigger, Diagnostician
Vocational, Technical or Trade Scho
1,074 satisfied customers
I just took a 2003 Larson 330 Cab for a sea trial, it has twin
I just took a 2003 Larson 330 Cab for a sea trial, it has twin carb 5.7 Mercs rated at 250 hp per. It had full fuel (220 gal) and some gear and water, 3 men (total 600 lbs) It would plane off very qui… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,406 satisfied customers
We are considering purchasing a 2001 Carver Motoryacht 396
We are considering purchasing a 2001 Carver Motoryacht 396 that has Volvo Penta 8.1L 370 HP gas inboard engines. We have heard that there were problems with these engines and, in fact, one of the engi… read more
James
James
Certified Marine Mechanic
Vocational, Technical or Trade Scho
4,094 satisfied customers
1998 Larson Cabrio with twin Volvo 350s I/Os, Holley 4 barrel
1998 Larson Cabrio with twin Volvo 350's I/O's, Holley 4 barrel carbs. Starboard engine starves out between 2k & 3K when in gear. It becomes worse the longer it is ran. I can throttle the gas up and t… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
18,955 satisfied customers
I have a 1995 Crownline 266BR with the 7.4L Mercruiser I/O.
I have a 1995 Crownline 266BR with the 7.4L Mercruiser I/O. I bought the boat used, so I don't have the factory recommended Prop Pitch and diameter, and I'm not sure what the top speed range should be… read more
James
James
Certified Marine Mechanic
Vocational, Technical or Trade Scho
4,094 satisfied customers
I have a 1989 Silverton 46 Aft Cabin with twin 6-71T Detroit
I have a 1989 Silverton 46 Aft Cabin with twin 6-71T Detroit Diesels. Both engines run fine with no weird noises, no smoke, and they fire right up every time but while cruising they both register abou… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
18,955 satisfied customers
just had a remand 351 ford installed and rebuilt outdrive.
just had a remand 351 ford installed and rebuilt outdrive. the prop seems like its not letting the boat to run rite. the boat wont go over 3500 rpm and takes forever to get up on plane. its an 89 bayl… read more
James
James
Certified Marine Mechanic
Vocational, Technical or Trade Scho
4,094 satisfied customers
We have a 3800lb 24 openbow with a 350 Mag Bravo 3 26 pitch.
We have a 3800lb 24' openbow with a 350 Mag Bravo 3 26" pitch. With a medium load its a little sluggish getting up on plane. I am thinking about going to a Bravo 3 XR 25" pitch. Do you think this will… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,406 satisfied customers
Have two identical 1989 Ford 351s on a twin engine Jet Boat.
Have two identical 1989 Ford 351's on a twin engine Jet Boat. Over the past 20 years one engine has steadily declined in its ability to run smoothly. It has been hard to start, ie it would start and d… read more
shane j forrest
shane j forrest
Vocational, Technical or Trade Scho
270 satisfied customers
I have a 16 Galaxy bowrider (1980) with a 3.0L mercruiser
I have a 16' Galaxy bowrider (1980) with a 3.0L mercruiser 120hp I/O, Mercruiser outdrive (not the bravo or alpha). Recently changed props after the 14"x19pitch would only get me to 28 or 29 mph at 51… read more
Andy
Andy
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Vocational, Technical or Trade Scho
16 satisfied customers
I have a 31 foot unflite with twin 318s 1.51 borg warner trans
I have a 31 foot unflite with twin 318s 1.51 borg warner trans props are 16x14 cupped. I am changing power to 350 chevs 2.10 trans I would like to know what prop size I can use. ase it is hard to buy … read more
Captain Dave
Captain Dave
Marine Mechanic
Master's Degree
2,672 satisfied customers
i have a 1989 340DA sea ray with twin 7.4 carb. while out
i have a 1989 340DA sea ray with twin 7.4 carb. while out on the boat last night.. about 40 mins into the cruise heard a "bump" behind myself (starboard engine) sounded like someone closing a cabinet.… read more
capt ron 1959
capt ron 1959
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Vocational, Technical or Trade Scho
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What size propeller should I use for Ocean vessel - 25 Bertram
What size propeller should I use for Ocean vessel - 25' Bertram w/twin 350 GM Gas w/Volvo/Penta 290 outdrives????… read more
Captain Dave
Captain Dave
Marine Mechanic
Master's Degree
2,672 satisfied customers
I have a 32.5 Donzi XLT with twin 7.4 MPI engines rated @
I have a 32.5' Donzi XLT with twin 7.4 MPI engines rated @ 310 hp each. I want more top end speed. The props that are on right now are 17" x 14 pitch - 3 blade. Can I go to a bigger diameter prop or a… read more
Captain Dave
Captain Dave
Marine Mechanic
Master's Degree
2,672 satisfied customers
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Meet the Experts:

Ted G.

Ted G.

Rigger, Diagnostician

1,074 satisfied customers

40 years boating, Safe boating instruct., Offshore Race promoter, Failure Analysis, Expert Witness

Dominick

Dominick

Marine Mechanic

1,009 satisfied customers

25 Years Experience as Mechanic, 20 Yrs Boat Yard Owner/Mechanic, Factory Certified

John White

John White

Marine Mechanic

306 satisfied customers

11 years experience working on outboards, inboards, sterndrives & pwcs

Jason

Jason

Marine Mechanic

18,955 satisfied customers

Degree in Marine Technology. Gas and diesel marine mechanic.

Tan

Tan

MerCruiser Certified Technician

11,406 satisfied customers

40 yrs. experience with complete engine repairs both inboard/outboard and MerCruiser Certified Technician.

Jeff G.

Jeff G.

Marine Mechanic

4,730 satisfied customers

42 years experience, Certified Master Technician, All Major Outboards, Sterndrives, Hi-Performance

Captain Dave

Captain Dave

Marine Mechanic

2,672 satisfied customers

USCG Licensed Captain, 20+ Years Boating, Fishing, Maintenance and Repair Experience

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Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

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