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I'm having major problems with mercruiser 470. 1986 model.
I'm having major problems with mercruiser 470. 1986 model. Coolant is rapidly going into engine oil from closed loop. Filled up coolant and ran boat at around in bayshore for 30 minutes and back to do… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade Scho
18,637 satisfied customers
I have a fountain 24 cs with a 454 mag. I just purchased the
I have a fountain 24 cs with a 454 mag. I just purchased the boat. I checked the oil before I used it. the oil was the cleanest oil I have ever seen. I replaced the impeller in the raw water pump ran … read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,264 satisfied customers
GOT WATER IN CRANKCASE AGAIN ALREADY REPLACED UPPER AND LOWER
GOT WATER IN CRANKCASE AGAIN ALREADY REPLACED UPPER AND LOWER ADAPTER PLATE GASKETS NOW GETTING WATER IN BREATHER HOSE AND AIR CLEANERXXXXXEFI 1700 CC… read more
Charles
Charles
Certified Mercury Tech
5,070 satisfied customers
I have a perkins diesel in my sailboat. It has a fresh water
I have a perkins diesel in my sailboat. It has a fresh water heat exchanger. The engine will run, but it runs hot after 15 -20 minutes. When I let the engine cool down, and check the fresh water level… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade Scho
18,637 satisfied customers
1988 Yamaha 175 2 stroke. Engine has been well maintained and
1988 Yamaha 175 2 stroke. Engine has been well maintained and carbs were rebuilt several years ago. Issue started this year with number 3 & 5 cylinder spark plugs covered in Milky White oil after runn… read more
Jeff G.
Jeff G.
Marine Mechanic
Vocational, Technical or Trade Scho
4,729 satisfied customers
1996 Carver with twin 350 Crusader engines 462 hours on each
1996 Carver with twin 350 Crusader engines 462 hours on each engine. Had oil, oil filters, fuel filters changed 10 days ago. The port engine, had been started and run for 25-20 minutes on 4 occasions,… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,264 satisfied customers
1999 Volvo Penta 5.7GL. Water in 2 cylinders. Pulled risers
1999 Volvo Penta 5.7GL. Water in 2 cylinders. Pulled risers and manifolds. Don't see any issue? I assume get new gaskets for risers an manifolds, put back together and try it? What can cause water to … read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,264 satisfied customers
inboard outboard four cylinder, went out on the water this
inboard outboard four cylinder, went out on the water this morning and engine started smoking (smelled like oil) but oil is a little over full but clean. shut it down and got towed in...any idea?… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade Scho
18,637 satisfied customers
I have a yanmar 3gm30 that was stored for 3 years. It isnow
I have a yanmar 3gm30 that was stored for 3 years. It isnow hard to start, must release 2 cylinders compression, but then it starts and runs rather well, but has very high crankcase presure- blowing o… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade Scho
18,637 satisfied customers
Hi Tan. Thanks for the previous help on the motor. After
Hi Tan. Thanks for the previous help on the motor. After trying what you said I figured out the probrlem: start the motor in the full down position instead full up but still pumping water! Works perfe… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,264 satisfied customers
My 1998/99 Bayliner 3.0 Merc hose blew off while I was taking
My 1998/99 Bayliner 3.0 Merc hose blew off while I was taking my first spin of the season. I noticed a funny noise and headed immediately back to our dock, open the cover and water was flowing in all … read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,264 satisfied customers
I have a 1996 5.7 volvo penta ran great onshore got wet on
I have a 1996 5.7 volvo penta ran great onshore got wet on monday ran for 30 mins than quit at dock discovered it had hydrolocked . What would be the main cause for this ? already removed the water an… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,264 satisfied customers
I have a 1992 Sea Ray Sundancer with a 7.4L Mercruiser (got
I have a 1992 Sea Ray Sundancer with a 7.4L Mercruiser (got it 3 years ago) with fresh water cooling (heatexchanger). Since the time I bought the boat it has always needed to have a small amount of an… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,264 satisfied customers
I have a 228 mercruiser stern drive with an overheating problem,
I have a 228 mercruiser stern drive with an overheating problem, the water pump works well but there is moisture escaping through the breather pipe from the rocker cover, could this indicate a symptom… read more
James
James
Certified Marine Mechanic
Vocational, Technical or Trade Scho
4,094 satisfied customers
I have a Perkins engine SN LD14849 U 449379V which has suddenly
I have a Perkins engine SN LD14849 U 449379V which has suddenly developed high pressure in the rocker cover/oil pan causing the oil to blow out the breather pipe into the air breather cover and turnin… read more
Jeremy R.
Jeremy R.
5,362 satisfied customers
Hi. Have starting problem on 1990 4.3 ltr mercruiser. When
Hi. Have starting problem on 1990 4.3 ltr mercruiser. When I try to start, the starter/bendix gives a quick "zing" and winds down. doesn't appear to engage ring gear except occasionally I would get a … read more
gearheadII
gearheadII
Bachelor's Degree
138 satisfied customers
Hello I have a 1997 Malibu Sunsetter that has a 265 hp Merc-crusier
Hello I have a 1997 Malibu Sunsetter that has a 265 hp Merc-crusier (350 V8 GM). The boat only has 150 hrs on it. Last weekend I took the boat out in a hurry just realize that I did not put the freeze… read more
Dr. Joe
Dr. Joe
Bachelor's Degree
198 satisfied customers
Have a 25-yr old MD7A that has been making raw/fresh water
Have a 25-yr old MD7A that has been making raw/fresh water in the crankcase. Replaced the water pump seal on the block. Still haven't solved the problem. Changing the oil very often and only run it 5-… read more
Captain Dave
Captain Dave
Marine Mechanic
Master's Degree
2,672 satisfied customers
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Dominick

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Jason

Jason

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Degree in Marine Technology. Gas and diesel marine mechanic.

Tan

Tan

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Jeff G.

Jeff G.

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Captain Dave

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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