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I have a 1996 Kawasaki 750 STS that runs and starts but
I have a 1996 Kawasaki 750 STS that runs and starts but won't get up to full speed. A friend says he thinks it needs a new check valve and fuel filter. Any ideas? … read more
Charles
Charles
Certified Mercury Tech
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My 2001 yamaha 115 2 stroke was running great at the end of
my 2001 yamaha 115 2 stroke was running great at the end of last season, started up this spring ang ran great at idle. started out onto lake and upon giving gas rpm's increased and then motor started … read more
Jason
Jason
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Vocational, Technical or Trade School
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Indmar 350. 2008 Moomba with 150 hours......Running rough
indmar 350. 2008 Moomba with 150 hours......Running rough and water in #6 cylinder when we take spark plug out. What is my next course of action … read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,399 satisfied customers
I have a 1999 Johnson 90 HP v4 that has always run great. However,
I have a 1999 Johnson 90 HP v4 that has always run great. However, at the end of last season the engine would "hesitate" or bog down when pulling a tube -- it seemed worse when I would zig zag the boa… read more
Tan
Tan
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My suzuki dt 30c is causing me some headache and heartache. it
my suzuki dt 30c is causing me some headache and heartache. it starts fine. high revs on neutral are fine. low revs on forward gear are fine. medium revs on forward make the motor caugh and then stop … read more
Charles
Charles
Certified Mercury Tech
5,378 satisfied customers
Hi Jeremy. Just drained the oil in my 05 115 Merc 4 stroke
Hi Jeremy. Just drained the oil in my 05 115 Merc 4 stroke and had some white substance come out in small clumps. Looks like water potentially, but I haven't changed the oil in a few seasons and have … read more
Charles
Charles
Certified Mercury Tech
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I have a 1981 Volvo Penta AQD40A six-cylinder deisel engine
I have a 1981 Volvo Penta AQD40A six-cylinder deisel engine that sufferes power loss at high RPM. The rev counter not working so I can't say exactly at what RPM. At high RPM, the engine loses power an… read more
Joe
Joe
Owner Kingsland Auto & Marine Services
Vocational, Technical or Trade Scho
1,392 satisfied customers
I have a Westerbeke 6.5kw gasoline low CO generator that I
I have a Westerbeke 6.5kw gasoline low CO generator that I bought new. After running under moderate load for 2-4 hours the motor will start surging rather dramatically, and won't stop until turned off… read more
Charles
Charles
Certified Mercury Tech
5,378 satisfied customers
i have a 2002 Sea Ray 230 with 5.0/Bravo3 and 89 total hours
i have a 2002 Sea Ray 230 with 5.0/Bravo3 and 89 total hours that made a very noticeable metallic 'ping' noise at about 4800 rpm operation on smooth water. this was a single noise like a high-tensile … read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,399 satisfied customers
Have a 1990 7.4L Mercruiser. Misses and backfires thru the
Have a 1990 7.4L Mercruiser. Misses and backfires thru the carb at 3200-3800 RPM. Fouls the #8 plug. New cap, rotor, plugs, ignition module, plug wires, and carb overhauled. Looked at rocker arms, pus… read more
James
James
Certified Marine Mechanic
Vocational, Technical or Trade Scho
4,094 satisfied customers
Westerbeke Diesel Gen 8 kw 69 hours total 3 years old on Formula
Westerbeke Diesel Gen 8 kw 69 hours total 3 years old on Formula 400ss. Does not start or crank. Found very low compression in all 4 cylinders. Found water ingestion in all 4 cylinders and significant… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,399 satisfied customers
We have a boat with 2 x Volvo Penta D7C-TA engines, 4 years
We have a boat with 2 x Volvo Penta D7C-TA engines, 4 years old, about 4000 hours. Both turbos rebuilt 12 months ago. Engines will start normally and will rev to max in neutral. When under load (in ge… read more
James
James
Certified Marine Mechanic
Vocational, Technical or Trade Scho
4,094 satisfied customers
I have a 1981 Campion Toba with the Volvo 260 / Chev 350 V8
I have a 1981 Campion Toba with the Volvo 260 / Chev 350 V8 motor and the Volvo 280 leg. The motor runs rough under load. Starts good, idles and revs good in Neutral, but as soon as I put it in gear a… read more
James
James
Certified Marine Mechanic
Vocational, Technical or Trade Scho
4,094 satisfied customers
I have a 1998 4-stroke mercury tiller motor. When I troll with
I have a 1998 4-stroke mercury tiller motor. When I troll with the motor and want to move to a different spot. As I advance the throttle the motor start out as if it flooded and may back fire to clear… read more
Jason
Jason
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Vocational, Technical or Trade School
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Volvo Penta inboard Colbalt Boat Last year, engine sucked
Volvo Penta inboard Colbalt Boat Last year, engine sucked in water into cylinder heads; plugs cleaned no damage to starter or any gears. Been running well this year. Tried to start last evening after … read more
Scott
Scott
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Vocational, Technical or Trade Scho
543 satisfied customers
2004 Yamaha XLT800 Put in water for first time of season
2004 Yamaha XLT800 Put in water for first time of season in June. Only runs at about 1/2 rpms and max of 24 m.p.h. Cleaned plugs. New gas with Gumout. Did not remedy the problem. Revs to full rpm when… read more
Jeremy R.
Jeremy R.
5,362 satisfied customers
I have recently installed an unused 3TNE 78A engine (SNo. 16932)
I have recently installed an unused 3TNE 78A engine (SNo. 16932) in my sailboat and runs fine except that the engine hunts at low revs both in and out of gear. I would like it to run smoothly down to … read more
Yachtwork
Yachtwork
Owner Team Yachtwork
Technical or Trade School
1,048 satisfied customers
have a 91 40 HP mercuy 4 cylinder classic. Seems to run fine
have a 91 40 HP mercuy 4 cylinder classic. Seems to run fine up to 4400 RPM. Taken it to the mech twice. Put in new fuel pump and plugs. Both times he said water in gas. I know this is not the case. H… read more
Captain Dave
Captain Dave
Marine Mechanic
Master's Degree
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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

Ted G.

Ted G.

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John White

John White

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Jason

Jason

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Tan

Tan

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Jeff G.

Jeff G.

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4,730 satisfied customers

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Captain Dave

Captain Dave

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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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