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Mercruiser 7.4L MPI's, in a 2001 Formula 330SS, that have
Mercruiser 7.4L MPI's, in a 2001 Formula 330SS, that have about 800 hrs. on them. Closed cooling system. Boat was used in Florida until 2013 and then it was shipped to upstate NY, where it's been used… read more
Jason
Jason
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Vocational, Technical or Trade School
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I have a Chapperal 250 signature with a Mercruiser 350
i have a Chapperal 250 signature with a Mercruiser 350 engine. There are only 260 hours on the boat. … read more
Tan
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Mercruiser 5.0L 260 Bravo3 overheated after getting stuck on
Mercruiser 5.0L 260 Bravo3 overheated after getting stuck on sand bar; was throttling down maybe a minute after alarm sounded; engine died; let cool, wouldn't turnover. Hydrolocked. Pulled plugs, had … read more
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Jason
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Thank you help. I have a 1998 Donzi with a 4.3L mercruiser alpha 1. Last yea
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Charles
Charles
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2004 Mercruiser 5.0 MPI V8 Bravo 3 is overheating. History:
2004 Mercruiser 5.0 MPI V8 Bravo 3 is overheating. History: It was a salt water boat that was drystacked in SC. Boat is a 2004 Sea Ray Sundeck 260. Engine serial number 668946 it has dry joints and a … read more
Jason
Jason
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Vocational, Technical or Trade School
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Engine SN: OW673430, mercruiser 5.0 MPI, drive serial num OW927662.
engine SN: OW673430, mercruiser 5.0 MPI, drive serial num OW927662. use boat in saltwater, engine is open cooled system using seawater for cooling. Temp are running between 185 and 205 on gauge on boa… read more
Tan
Tan
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we are getting the sea ray 87 weekender need to know the spec
we are getting the sea ray 87 weekender need to know the spec and the equipment that model comes with what is the capacity water tank what is the capacity for the holding tank for sewer… read more
Tan
Tan
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Certified Marine Technician
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1996 4.3LX/V6 has hydrolocked. no water in oil. only in cylinders.
1996 4.3LX/V6 has hydrolocked. no water in oil. only in cylinders. No oil in bilge. was running fine at normal temp and press until it started running rough w/load-fine at idle. slowly accelerated tri… read more
Tan
Tan
MerCruiser Certified Technician
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I have water in all the cylinders on the port side of my engine,
I have water in all the cylinders on the port side of my engine, 350 MAG MPI. Boat is a 2000 Rinker 270 Fiesta Vee. Engine was running fine, went out for a short spin (10 minutes) shut down engine and… read more
orcamarine
orcamarine
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I am having the same kind of problem with the Eagle and Merc
I am having the same kind of problem with the Eagle and Merc crusier with hydro locking after tailoring. There was an article that said the difference should be minimum of 13" from the top of transom … read more
Tan
Tan
MerCruiser Certified Technician
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Hi there, have a genuine mercruiser 1976 model with alpha leg. The
Hi there, have a genuine mercruiser 1976 model with alpha leg. The engine has 150 PSI compression on all cylinders. MY problem is blow back into the rocker covers pushing dip stick out. The problem on… read more
Jeremy R.
Jeremy R.
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hi i have a bayliner with 2 marine power engines about 2002
hi i have a bayliner with 2 marine power engines about 2002 v8 260 hp; 350cu" chevrolet by Marine Power new in 2002 260 hp ea Fresh water cooling each i have had a survey they say there is sea water i… read more
Tan
Tan
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I have a 2000 Searay380 AC with 7.4 Mercruiser Horizons with
I have a 2000 Searay380 AC with 7.4 Mercruiser Horizons with 250 hours. I am getting ready to replace the starboard engine for the 2nd time - 3 engines in 250 hours. My mechanic tells me that it's a S… read more
James
James
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Mercruiser 5.0 MPI, engine overheated due to impellor failure,
Mercruiser 5.0 MPI, engine overheated due to impellor failure, however when trying to start it was hydro locked. Am I likely to have bent conrods? Compression test looked ok, water though was in all 8… read more
Tan
Tan
MerCruiser Certified Technician
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Two weeks ago I put my Searay 200 BR (4.3L Mercruiser) in the
Two weeks ago I put my Searay 200 BR (4.3L Mercruiser) in the water. Started the engine and reved idled for a minute or two. then died. I predicted water in the gas. Took the boat out, replaced fuel/w… read more
Tan
Tan
MerCruiser Certified Technician
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I have a over heating problem with a 260 hp Mercruiser chevy
I have a over heating problem with a 260 hp Mercruiser chevy thru the hull drive engine.It is overheating so I removed the thermostat,boats in Miami,still over heats and the cooling water is black and… read more
Jeff G.
Jeff G.
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I found an old water shutter in my exhaust port. Where are
I found an old water shutter in my exhaust port. Where are the water shutters located on a 1982 Mercruiser 260 (350 CI pre-alpha), and how are they replaced? Do you have a parts diagram, and do I need… read more
Dominick
Dominick
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Vocational, Technical or Trade Scho
1,009 satisfied customers
Recently, I experienced water in cylinders of both of my mercruiser
Recently, I experienced water in cylinders of both of my mercruiser mag 496's....2005 models (not sure of SN), this happened as I came off of plane. I heard that the early models didn't have flappers … read more
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Dominick
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Meet the Experts:

Ted G.

Ted G.

Rigger, Diagnostician

3,332 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

24,872 satisfied customers

Degree in Marine Technology. Gas and diesel marine mechanic.

Tan

Tan

MerCruiser Certified Technician

11,409 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

Noel Schembri

Noel Schembri

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2,759 satisfied customers

Advanced technical diploma

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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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