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I have a Merc 60hp efi 4 stoke. I have a foil on it and it
I have a Merc 60hp efi 4 stoke. I have a foil on it and it seems that the RPMs are low at full throttle. Do I need a new prop or lower pitch? will a lower pitch increase spead to rpm? … read more
Noel Schembri
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I have a 18ft 1985 ranger 370-v w/ a 150 mercury blackmax
I have a 18ft 1985 ranger 370-v w/ a 150 mercury blackmax that had a 23p prop that takes off very slow out of the water. A mechanic said I should try a 21" pitch or 19" pitch. I tried a 21" pitch over… read more
Noel Schembri
Noel Schembri
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Live in Colorado and recently bought a 2007 South Bay
Live in Colorado and recently bought a 2007 South Bay tritoon with the 350 mercruiser engine. Currently have an enertia 48-898988 14 pitch propeller and am only getting 28 mph max. Could you recommend… read more
Noel Schembri
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I need to know the best prop for my boat. 1969 starcraft, 18
I need to know the best prop for my boat. 1969 starcraft, 18 foot. 125 hp mercury 2bstr\\\ 2 stroke. use for pulling a tube and skiers … read more
Noel Schembri
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I bought a new mercury 6 hp 4 stroke and put it on a 16'
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Jason
Jason
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Vocational, Technical or Trade School
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I have 2 honda 60 hp gh thrust 4 strokes on a 40 ft house
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Jason
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I have a 24ft timber boat weighing approx 2.3tonne. I am running
I have a 24ft timber boat weighing approx 2.3tonne. I am running a 4 cylinder Mazda diesel producing 62 hp, coupled with a Volvo 2:1 reduction gearbox, relatively heavy pitched prop. The boat is just … read more
Tan
Tan
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Certified Marine Technician
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Hi, My name isXXXXX have one question about marine propulsion
Hi, My name isXXXXX have one question about marine propulsion boat which was unable to get desired speed. It was a light alloy crew boat with the following particulars: Gross tonnage: 226 Net tonnage:… read more
Diesel Boat Doc
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I have a 16 ft. aluminum Legend fishing boat (side console).
I have a 16 ft. aluminum Legend fishing boat (side console). The hull Weight is 640 lbs. Maximum capacity is 1,220 lbs. The outboard engine is 25 HP EFI 4-Stroke. The engine's full throttle RPM range … read more
Jason
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We were beating to windward yesterday against current, waves
We were beating to windward yesterday against current, waves and 17 knots of wind no sail. It was a shakedown cruise of sorts. We have a small yanmar. It is a 9h the 1GM-10. When we went to full throt… read more
Jason
Jason
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we are based in australia in the state of south australia in
we are based in australia in the state of south australia in the capital city of adelaide. we have a tohatsu m40c 361 serial no.96996 rated power 29.4kw full throttle range 5200 - 5800 rpm outboard bo… read more
Jeremy R.
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i have a honda 25hp outboard on a viking boat, engine is 
i have a honda 25hp outboard on a viking boat, engine is only 2 years old, it stuggles to do 5 knots whereas a friend with similar boat and engine gets around 8 knots.rev counter is doing 4200 rpm at … read more
Jeff G.
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I have a 2007 Carver 45 Cockpit Motor Yacht about 37,000 lbs
I have a 2007 Carver 45 Cockpit Motor Yacht about 37,000 lbs with fuel. I have Volvo D6 370 HP inboard engines. I think it's under powered and is very sensitive to Barnacles, wind and currents. It sho… read more
Yachtwork
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We run a 2007 Mercury Verado 225 HP on a 6.8 m (22 foot) very
We run a 2007 Mercury Verado 225 HP on a 6.8 m (22 foot) very deep vee Plate Alloy Centre Console boat in tropical offshore waters (Barrier Reef, Australia). All up vessel weight about 2000 kgs (4400 … read more
Master Tech
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I have a 2008 model Suzuki 4 stroke 90hp outboard fitted to
I have a 2008 model Suzuki 4 stroke 90hp outboard fitted to a 5.25 center console alum. boat. The stainless steel prop fitted by the dealer is a 3 blade, 14 x 18 which although has good low speed grun… read more
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i have a 14 ft Nautica Rib with a Yamaha T60 and am have big
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What size props would a 1978, 33 foot bayliner cabin cruiser,
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Captain Dave
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I have a bayliner 2556 motor cruiser, with a mercruiser D3-6Ldiesel
I have a bayliner 2556 motor cruiser, with a mercruiser D3-6Ldiesel engine with a bravo 2 leg. I can only achieve about 15 knots and a maximum of 3400RPM. Propleller and bottom have all been checked. … read more
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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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