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1989 mercruiser 7.4 bravo, water getting in oil, lots of it,
1989 mercruiser 7.4 bravo, water getting in oil, lots of it, after idling for just 5 mins or so. i would say 6-7 quarts for sure. maybe 6" rise on oil dip stick. most online suggests cracked block … read more
Noel Schembri
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Have a crack in outside of exhaust manifold on Mercruiser
Have a crack in outside of exhaust manifold on Mercruiser 3.0. Looked at block freeze plugs and all look good. Oil is a dark tan color, not white milky. What should I be looking for if I take off the … read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
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I have a mercruiser outdrive and a v-6 chevy engine in a 185
I have a mercruiser outdrive and a v-6 chevy engine in a 185 Searay. Unfortunately had communication issues in the family and the boat did not get drained at the end of the season. The castings on bot… read more
Tan
Tan
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Certified Marine Technician
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I have a OMC 140 engine in my 1983 Glastron boat I am getting
I have a OMC 140 engine in my 1983 Glastron boat I am getting water in my crankcase oil at about a litre in 6hrs mostly running at low rpm trolling. What are the potential causes. Al… read more
Tan
Tan
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i have a 1979 mark twain w an in doard in line chev 6 cyylinder
i have a 1979 mark twain w an in doard in line chev 6 cyylinder engine.it stats up then blows the dipstick out and oil all over.took head off to see if there was a hole in piston they are fine.no oil … read more
Tan
Tan
MerCruiser Certified Technician
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11,409 satisfied customers
4.3 v6 boat was drained last winter 4 plugs. all 4 points drained
4.3 v6 boat was drained last winter 4 plugs. all 4 points drained .this an 03 with only 17 hrs. on it. bought it new . back in sep. ran it for 30 min. cruise. found water in crankcase alot. whats the … read more
Jason
Jason
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Vocational, Technical or Trade School
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HI I have a Penta 3.0GL with a crack in the manifold,and severe
HI I have a Penta 3.0GL with a crack in the manifold,and severe corrosion to the manifold, and valves. The engine was loosing power and then had trouble starting. Not much use this year, wondering whe… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,409 satisfied customers
I have a mercruiser 350 V8 with an Alpha 1 outdrive, raw water
I have a mercruiser 350 V8 with an Alpha 1 outdrive, raw water cooled. It was running fine until water entered the cylinders. It sputtered out slowly (no SUDDEN hydrolock). When it quit, we tried to r… read more
Jason
Jason
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Vocational, Technical or Trade School
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I have water in my crankcase on a 2000 Volvo Penta 5.7 GSi.
I have water in my crankcase on a 2000 Volvo Penta 5.7 GSi. Engine only has 78 hours on it. What is the most likely cause? The engine has never over heated to my knowledge.… read more
Tan
Tan
MerCruiser Certified Technician
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I have a 77 vintage mercruiser 165 in line 6. The block was
I have a 77 vintage mercruiser 165 in line 6. The block was not drained which resulted in horizontal crack under the manifold. I pulled the manifold which seems to be ok (no crack). On the head there … read more
K. Kergan
K. Kergan
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Vocational, Technical or Trade Scho
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i am new to boating. have a 1995 chaparral with mercruiser
i am new to boating. have a 1995 chaparral with mercruiser 5.7L engine. have had for 3 years. cranked up to take out this weekend for first time this summer. locked up. took spark plugs out. water in … read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
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I have twin 8.1S mercruiser engines. My manifolds are starting
I have twin 8.1S mercruiser engines. My manifolds are starting to show corrosion. I read that mercruiser is backing all engines with aluminum manifolds. Is this true? I was also told by a mercruiser m… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,409 satisfied customers
i have a 76 140 mercruiser water in oil when you pull the
i have a 76 140 mercruiser water in oil when you pull the dipstick out at high idle it spits oil i just replaced head gasket and it still does it… read more
K. Kergan
K. Kergan
Inboard/Outboard Mechanic
Vocational, Technical or Trade Scho
1,031 satisfied customers
I have a 2005 - 3.0 Mercruiser with water in the oil (250 hrs).
I have a 2005 - 3.0 Mercruiser with water in the oil (250 hrs). I change the oil and it comes back, no overheating - oil pressure is good as long as I change the oil before the next trip. Local techni… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,409 satisfied customers
I have not used my Bayliner 21 ft for 2 years but run the engine
I have not used my Bayliner 21 ft for 2 years but run the engine every other month with a garden hose to supply the cooling water. I check the oil every time but now suddenly there is water in the oil… read more
Jeff G.
Jeff G.
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Vocational, Technical or Trade Scho
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I have a 2004 chapparal 290 I discovered water in the oil was
I have a 2004 chapparal 290 I discovered water in the oil was creamy my marina says comppression on all cylinders was leading them to beleive a crack in the block a defect they have seen before my luc… read more
mercmastertech
mercmastertech
Service Manager, Master technician
Technical School
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I have a 180 mercruiser and water leaked down into #3 cylinder
I have a 180 mercruiser and water leaked down into #3 cylinder and seized up. My question is, Is it worth rebuilding , can they be bored out , or is it more cost effective to buy a remanufactured mote… read more
Mechman45
Mechman45
Vocational, Technical or Trade School
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1.)FIRST START OF THE YEAR (MICHIGAN)1996 MERCRUISER 5.0L WATER
1.)FIRST START OF THE YEAR (MICHIGAN)1996 MERCRUISER 5.0L WATER GETTING INTO ENGINE OIL FOUND #1 CYLINDER CRACK, NO EXSAUST CRACKS OR BLOCK CRACKS, DID OVERHEAT THE LAST RIDE LAST FALL. NO SIGNS OF OV… read more
Captain Dave
Captain Dave
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Jeff G.

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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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