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I have a cobra 4.3 with a cobra outdrive. It has a 14 1/2 x
I have a cobra 4.3 with a cobra outdrive. It has a 14 1/2 x 19 prop. I was given a ss prop, 15 1/4 x 19. Can I use this prop and what is the difference. I do a lot of trolling and occasionaly pull the… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
18,955 satisfied customers
Looking for a recommendation for type of propeller
Looking for a recommendation for type of propeller replacement for my boat. 26 ft Searay 260DA. 5.7 Mercruiser 350 MAG MPI 300 HP with Bravo 3 outdrive. Max RPM is 5000. Ratio is 2.20 : 1. Current cou… read more
Charles
Charles
Certified Mercury Tech
5,526 satisfied customers
I have what I think is a 2006 mercury 350 MPI engine with a
I have what I think is a 2006 mercury 350 MPI engine with a bravo 3 drive. I boat on Lake Coeur d'Alene in Idaho elev. 2125ft. Have 20p props. Question is I can only get 4200 rpm and about 25 mph out … read more
Ted G.
Ted G.
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Vocational, Technical or Trade Scho
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I have a 2006 Mercruiser 350 MPI with Bravo III drive and SS
I have a 2006 Mercruiser 350 MPI with Bravo III drive and SS Prop 20 degree pitch. The boat is a Cruisecraft 700 executive (planing hull and weight of Boat and Motor is 2800kgs). Had motor serviced 6 … read more
Tan
Tan
MerCruiser Certified Technician
11,504 satisfied customers
I have a Mercruser 4.3L connected to a Alpha drive (all 1997).
I have a Mercruser 4.3L connected to a Alpha drive (all 1997). I takes a higher rpm than normal to reach crusing speed. Checked the prop becasue the problem started about the time I changed props, but… read more
Tan
Tan
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11,504 satisfied customers
I have a Trophy 2352 which has a mercrusier motor. The motor
I have a Trophy 2352 which has a mercrusier motor. The motor has a 2 barrel carburetor and I have tried 4 different props and the motor will not rev past 3800 RPM. My biggest problem is hole shot. I p… read more
James
James
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Vocational, Technical or Trade Scho
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1987 25 hp yamaha misfires at approx 3500 rpm as boat is coming
1987 25 hp yamaha misfires at approx 3500 rpm as boat is coming onto plane . then seems to pick up as boat gets on top of water. does not misfire at top speed… read more
James
James
Certified Marine Mechanic
Vocational, Technical or Trade Scho
4,094 satisfied customers
Hi. I have a 1996 searay 240 sundancer with a 5.7l 2 bbl with
Hi. I have a 1996 searay 240 sundancer with a 5.7l 2 bbl with alpha drive. The prop is an original 3 blade mercruiser 17p. I want to change to a 4 blade prop. What should a put? A 16p or a 18p? I know… read more
Whitecap36
Whitecap36
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Vocational, Technical or Trade Scho
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Hello, I have a 1997 Baja Hammer with a 7.4 MPI. When I bought
Hello, I have a 1997 Baja Hammer with a 7.4 MPI. When I bought the boat the guy I bought it from had a 15.25 x 26 SS 4 blade prop on it and wide open throttle it peaked at about 4400 RPM. It took a wh… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
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I have a mercruiser 488. What is the recommended rpm range
I have a mercruiser 488. What is the recommended rpm range and does this mean I should cruise between this range and not at lower RPMs. Can you hurt the engine if you run at or near full revs for more… read more
Noel Schembri
Noel Schembri
Marine mechanic
Diploma
1,804 satisfied customers
hey i have 1995 intimidator i noticed that the jackplate was
hey i have 1995 intimidator i noticed that the jackplate was all the way down.I was wonder if i moved it up if the boat would plane faster and if the mph wold improve.… read more
Master Tech
Master Tech
Service Manager/Technician
Vocational, Technical or Trade Scho
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What diameter & pitch propellar would you recommend for a 27
What diameter & pitch propellar would you recommend for a 27 ft, 5000 lb, cabin cruiser with a 1987 mercruiser 454 / alpha 1 sterndrive? I bought an under-performing boat with a prop that cannot be re… read more
Captain Dave
Captain Dave
Marine Mechanic
Master's Degree
3,847 satisfied customers
Bought a Sea Sprite 225 Cuddy...doesnt want to plane. in larger
Bought a Sea Sprite 225 Cuddy...doesn't want to plane. in larger lake (fox), did get it to plane, finally (2 people, calm water) but can't seem to plane, or pick up speed in smaller lake. Admitedly, s… read more
K. Kergan
K. Kergan
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being told all diff things what is the max rpm and what is
being told all diff things what is the max rpm and what is the best prop to use to acheieve this with out over reving the boat is a 98 bayliner capri with the 3.0l(NNN) NNN-NNNNmodel… read more
Captain Dave
Captain Dave
Marine Mechanic
Master's Degree
3,847 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
11,504 satisfied customers
I have a 4.3l merc i/o with alpaXXXXX boat is a 21
I have a 4.3l merc i/o with alpaXXXXX boat is a 21 ft cuddy 2600lbs. I have a 19 pitch prop on now, but runs high rpm 3500 at 20-23mph. will a 23 pitch bring rpm down?… read more
Master Tech
Master Tech
Service Manager/Technician
Vocational, Technical or Trade Scho
1,167 satisfied customers
Have a 28 donzi zxo with twin 350 magnums, what would be the
Have a 28' donzi zxo with twin 350 magnums, what would be the best prop to run for top speed and coming out of the hole quick?… read more
Captain Dave
Captain Dave
Marine Mechanic
Master's Degree
3,847 satisfied customers
hi,i bought a 1988 bayliner trophy 21 ft. it had a 4.3 from
hi,i bought a 1988 bayliner trophy 21 ft. it had a 4.3 from fact. a 5.7 was put in 2004, the leg had to be rebuilt in 2006, was this from to much torque from the 5.7 or is it the same leg as the 4.3?… read more
Dominick
Dominick
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Vocational, Technical or Trade Scho
1,009 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

11,504 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

3,847 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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