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Carlos here again. So I was out with the family all was
Hi Jason. Carlos here again. So I was out with the family all was good. Then I noticed the temp was up to about 225. I slowed down and check the motor noticed the belt had snapped I continue slowly to… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade Scho
18,650 satisfied customers
Well my 470 mercruiser 1982 is overheating 240 degree my
well my 470 mercruiser 1982 is overheating 240 degree my heat exchanger must be plugged somewhere not circulating well … read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,264 satisfied customers
I have a 1983 wellcraft boat with 170 4 cylinder mercruser
I have a 1983 wellcraft boat with 170 4 cylinder mercruser motor that has heat exchanger. Have had it out several times but it overheats every time have changed impeller water pump. And checked exchan… read more
Tan
Tan
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Certified Marine Technician
11,264 satisfied customers
If the cooling system is airbound because of a head gasket
If the cooling system is airbound because of a head gasket would you see milky oil or other signs? My block is running at 200 degrees when over 2500 rpm. I can run 2500 or under at 180. When it runs h… read more
briggs archer
briggs archer
master marine mechanic
Associate Degree
374 satisfied customers
I have a 3116 300 HP temperature at thermostat getting up to
I have a 3116 300 HP temperature at thermostat getting up to 220 replaced thermostat and still there took it out ran the engine and it is running at 110 at thermostat. Any suggestions we are at a lost… read more
K. Kergan
K. Kergan
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Vocational, Technical or Trade Scho
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I have a 1989 bayliner 2455 ciera sunbridge with the 5.8 motor,
I have a 1989 bayliner 2455 ciera sunbridge with the 5.8 motor, just put new exhaust manifolds on and first time out motor got hot about 220 deg motor then had a slight knock ,oil pressure dropped. sh… read more
Jeff G.
Jeff G.
Marine Mechanic
Vocational, Technical or Trade Scho
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what causes a 7.4 to run 200 degrees when its twin runs 175
what causes a 7.4 to run 200 degrees when its twin runs 175 degrees. I have changed everthing then I crossed wired everthing to the port motor.It still runs 200 deg. Ive used a laser temp. gun and com… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade Scho
18,650 satisfied customers
i have a volvo penta 3.0 gs marine engine that is building
i have a volvo penta 3.0 gs marine engine that is building alot of water pressure through out the cooling system has blown a ciculator pump hose . motor keeps a good temp at 150 degrees and thermostat… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade Scho
18,650 satisfied customers
Hi Icontacted you in October regarding loss of power on Volvo
Hi Icontacted you in October regarding loss of power on Volvo 61A marine engines. Have since striped engines and found fault to be piston rings stuck in piston have removed and cleaned carbon off and … read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade Scho
18,650 satisfied customers
I have a Yanmar 3GM30F in my 33 sailboat. While motoring at
I have a Yanmar 3GM30F in my 33' sailboat. While motoring at 3400rpm for 45 mins. it overheated. I checked the impeller and strainer and all was OK. I restarted and cruised for another 2hrs at 2400rpm… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade Scho
18,650 satisfied customers
Im losing a lot of water out of my radiator tank,engine is
Im losing a lot of water out of my radiator tank,engine is overheating,quite a bit of steam coming through the leg exhaust. My engine is a 240hp marine to a mercruiser leg. Model no. is a 4 lha stze… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade Scho
18,650 satisfied customers
I have a 2001 Bertram 390 with twin TAMD74EDC. Had boat for
I have a 2001 Bertram 390 with twin TAMD74EDC. Had boat for four years with no motor problems. Yesterday I took the boat out and starboard overheated under light load. Replaced raw water impeller and … read more
Captain Dave
Captain Dave
Marine Mechanic
Master's Degree
2,672 satisfied customers
I have a 1987 Jasper rebuilt 165 4-cyl fresh water cooled engine.
I have a 1987 Jasper rebuilt 165 4-cyl fresh water cooled engine. There is plenty of water flow in the salt eater system (lower unit). The problem is in the engine. When the boat is started the tempat… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,264 satisfied customers
I have had problems with coolant loss for some time, which
I have had problems with coolant loss for some time, which was decreased by fitting new pressure caps to both engines. NB this boat has been converted to LPG so the coolant also runs through the LPG g… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,264 satisfied customers
Hi I have a 24 79 daycruiser that had a 350 chevy #260#
Hi I have a 24' '79 daycruiser that had a 350 chevy #260# XXXXX I am putting a 502 in it. I bought a 454 for parts and bravo drive that I will use. Im having trouble with the water hose piping. I now … read more
K. Kergan
K. Kergan
Inboard/Outboard Mechanic
Vocational, Technical or Trade Scho
1,031 satisfied customers
I have a 2000 mercruiser 350 mpi engine with the mercury closed
I have a 2000 mercruiser 350 mpi engine with the mercury closed cooling system. The antifreeze is getting diluted and is passing somehow. the cooling tank with the antifreeze loose about one quart per… read more
Captain Dave
Captain Dave
Marine Mechanic
Master's Degree
2,672 satisfied customers
I would like to flush and change the anti-freeze on the fresh
I would like to flush and change the anti-freeze on the fresh water cooling side of my Mercruiser 350 Magnum MPI engine. It is a model year 2004 with the dealer installed fresh water cooling package w… read more
Captain Dave
Captain Dave
Marine Mechanic
Master's Degree
2,672 satisfied customers
I have a 1982 mercruiser 470 that is overheating. We changed
I have a 1982 mercruiser 470 that is overheating. We changed the impeller in foot and it still overheats. What next?… read more
Whitecap36
Whitecap36
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Vocational, Technical or Trade Scho
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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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