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Looking at a 22'pontoon boat with a 140 hp 4 stroke Suzuki.
Looking at a 22'pontoon boat with a 140 hp 4 stroke Suzuki. The problem is that it appears to capitate at 3200 rpm. The speed doesn't increase, but the rpm jumps to 6000. The motor is on a jack plate … read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade Scho
18,504 satisfied customers
I just received a new mercury 115HP motor 2003 25' crest LM
I just received a new mercury 115HP motor for my 2003 25' crest LM II pontoon. We have a 4 blade prop. (992202 15x16 vortex mi wheel) on smooth water we are at 25 MPH and approx 5200 rpm. Everything i… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade Scho
18,504 satisfied customers
I have a 2007 Yamaha 40 HP outboard with about 70 hours on
I have a 2007 Yamaha 40 HP outboard with about 70 hours on the clock. The motor is serviced regularly. Yesterday after leaving the ramp and starting to head out the motor revved as if the prop was out… read more
Jason
Jason
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Vocational, Technical or Trade Scho
18,504 satisfied customers
Jeremy i have a 1996 sea doo gti that on trailer revs up fine
Jeremy i have a 1996 sea doo gti that on trailer revs up fine but in water will on rev up to mid range and speed along at a slow 20 mph max...i dont thinks its the pump az when i look back i can clear… read more
Jeremy R
Jeremy R
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2002 Yamaha FX140 Jet Ski, the intake is clogging up almost
2002 Yamaha FX140 Jet Ski, the intake is clogging up almost instantly when in the water and not clearing the debri being sucked up. Any thoughts?… read more
RSRBOB
RSRBOB
MC / Pwc Shop Owner
Vocational, Technical or Trade Scho
423 satisfied customers
2 questions First off I have a 225 merc black max outboard
2 questions First off I have a 225 merc black max outboard I believe to be a 1994. Started off today cruising for about 15 minutes or so and all of a sudden when I tried to throttle up a bit more to s… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade Scho
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I HAVE 1995 V-4 90 HP.mounted on a pontoon boat. trying to
I HAVE 1995 V-4 90 HP.mounted on a pontoon boat. trying to determine the height of cavitation plate above or below the bottom of the potoon.… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,264 satisfied customers
I have 1994 Mercury 50 HP on pontoon boat. It overevs at above
I have 1994 Mercury 50 HP on pontoon boat. It overevs at above 3000 after warming up. It has 10 in diameter 11 in pitch prop which was just reworked. I have had this problem with the boat since say on… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,264 satisfied customers
my 1996 120hp will idle and run at half speed just fine ,but
my 1996 120hp will idle and run at half speed just fine ,but it will not plain out. when you go from half speed to full speed the engine revs but its like the blower dosnt want to kick in and it loose… read more
Jeremy R
Jeremy R
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purchased "new" 2006 johnson 90hp v4 2stroke for 20 foot pontoon
purchased "new" 2006 johnson 90hp v4 2stroke for 20 foot pontoon ('06 Bentley with lifting strakes), and this motor cavitates over 4000 rpm (was equipped with '03 merc 75). which size and type of prop… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,264 satisfied customers
ss ft pontoon, mercury 50 hp engine. Major cavitation problem.
ss ft pontoon, mercury 50 hp engine. Major cavitation problem. Have tried various props, currently with a 4 blade.… read more
James
James
Certified Marine Mechanic
Vocational, Technical or Trade Scho
4,094 satisfied customers
Can you send me a rigging diagram to mount a single engine
Can you send me a rigging diagram to mount a single engine behind a pontoon. Its for a 7m wide houseboat; it sits on 2 pontoons and there is a center pontoon where a single engine is mounted. This pon… read more
Jeremy R
Jeremy R
1,069 satisfied customers
30 foot 2000 Crest pontoon, 4.3 mercruser motor IO. The motor
30 foot 2000 Crest pontoon, 4.3 mercruser motor IO. The motor stated cavitating. Always dry docked except for last year. Prop was not spun but purchased a new prop. Motor is not over heating. Problem … read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade Scho
18,504 satisfied customers
I have a 28 HP Johnson and I got into some heavy I mean heavy
I have a 28 HP Johnson and I got into some heavy I mean heavy algae and weeds and lost my piss stream and over heated, I let it cool and restarted I have my piss stream back but not very strong and it… read more
Jeff G.
Jeff G.
Marine Mechanic
Vocational, Technical or Trade Scho
4,729 satisfied customers
I have a 1979 Weres 24 pontoon that was outfitted from the
I have a 1979 Weres 24' pontoon that was outfitted from the manufacturer with a OMC 2.5 L with a Stringer model 400. The combo works well, except when running faster than half throttle. The temp climb… read more
James
James
Certified Marine Mechanic
Vocational, Technical or Trade Scho
4,094 satisfied customers
My Johnson 9.9 hp four stroke motor floods when weeds build
My Johnson 9.9 hp four stroke motor floods when weeds build up on the submerged drive. I think that the carburetor float needle valve sticks open. I have to open the drain screw to drain the carbureto… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,264 satisfied customers
My Seedoo is bogging down and has no power. It starts right
My Seedoo is bogging down and has no power. It starts right up and revs up to 8 ,000 rpm no problem. I drained the rear pontoons, and check the engine out. Nothing looks out of place. Is it in the jet… read more
Jeremy R
Jeremy R
1,069 satisfied customers
I have a 20 pontoon boat with a 1998 50 hp johnson 2 stroke
I have a 20' pontoon boat with a 1998 50 hp johnson 2 stroke with short shank. I have been having cavitating problems with it. It will just go along, then revs up as if it was out of the water. I was … read more
ROCKET
ROCKET
MASTER CERTIFIED TECH
Vocational, Technical or Trade Scho
426 satisfied customers
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Meet the Experts:

Dominick

Dominick

Marine Mechanic

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

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John White

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Jason

Jason

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Tan

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Jeff G.

Jeff G.

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Captain Dave

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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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