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I have a 2006 Mercruiser 5.0 engine, I just changed the oil
I have a 2006 Mercruiser 5.0 engine, I just changed the oil and replaced the raw water impeller,(which I've done several times before because they've been broken, took the boat out for a test run and … read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
24,123 satisfied customers
It is overheating. I can not figure out which mercruiser
It is overheating. I can not figure out which mercruiser motor I have in it since the serial numbers are missing. … read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
24,123 satisfied customers
I have replaced my impeller and thermostat. My Mercruiser
I have replaced my impeller and thermostat. My Mercruiser 350 mag temp gauge is at 185-190. What could be the problem?… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
24,123 satisfied customers
I have a 2004 Mercruiser 5.7 250 hp, Alpha one drive, gen 2.
I have a 2004 Mercruiser 5.7 250 hp, Alpha one drive, gen 2. I've seen some info online about “drive showers” / “drive coolers”, and am just looking for an opinion or advice as to whether or not these… read more
Jason
Jason
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Vocational, Technical or Trade School
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I have a Volvo 8.1 recently new (2 yr old) that is
I have a Volvo 8.1 recently new (2 yr old) that is overheating-- I replaced the sea water pump- ran water thru the top of the heat exchanger and discharge out the bottom seemingly freely, Still overhe… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
24,123 satisfied customers
Recently had manifold and risers opened and checked.
Recently had manifold and risers opened and checked. Replaced with new gaskets. At that point the engine starting overheating at idle, 225+ add a little throttle 1000rpm, it would cool off below 160. … read more
Jason
Jason
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Vocational, Technical or Trade School
24,123 satisfied customers
I'm working on an 8.1 Mercruiser new long block manifolds
Hello I'm working on an 8.1 Mercruiser new long block manifolds and impeller I'm running on hose with plunger to through hole. (Works fine for port engine) I have good flow all the way to the manifold… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
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I have just brought fletcher with a 3.0 mercruser inboard
hi i have just brought fletcher with a 3.0 mercruser inboard with an alpha one sterndrive looks like new and i believe its four years old. the guy put it on the hose and it pumped water fine. i have t… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,409 satisfied customers
I am having trouble with the salt water pickup. In the water
I am having trouble with the salt water pickup. In the water it seams to cool just fine but when I wash up and I use the ear muffs on the leg to flush fresh water the pump doesn't want to suck water.… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
24,123 satisfied customers
, Im having ongoing issues with my mercruiser 5.7 MPI
Hello, Im having ongoing issues with my mercruiser 5.7 MPI Horizon motor overheating. I have tried many things including manifolds, elbows, raw water pump etc... It is a half closed cooling systems. I… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
24,123 satisfied customers
Mercruiser 4.3LX V6 with Alpha Gen 2 drives. Thunderbolt Ignition.
Mercruiser 4.3LX V6 with Alpha Gen 2 drives. Thunderbolt Ignition. Standard carburetor. Problem: Starboard Engine High Speed Overheating At idle and speeds up to 2000 rpm, temp is ok. After getting up… read more
Tan
Tan
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Certified Marine Technician
11,409 satisfied customers
I have a overheating problem in a 5.7 volvo penta 1999 .we
I have a overheating problem in a 5.7 volvo penta 1999 .we have changed water pump ,impeller,cleaned risers , flused block ,changed thermostat,removed thermostat,flushed block,swapped outdrives ,used … read more
Jason
Jason
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24,123 satisfied customers
I have a 06 mercruiser/alpha with a closed cooled system went
I have a 06 mercruiser/alpha with a closed cooled system went to run it after 2 weeks and it overheated no water to the heat exchanger the pump on the sterndrive is working the impeller on the engine … read more
dieselhub
dieselhub
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Hi there I have a 5,0 Mercruiser MPI with a alpha one drive
Hi there I have a 5,0 Mercruiser MPI with a alpha one drive with seawaterpump in it. I would like to modify the seawater system and install an engine mounted drivebelt driven seawaterpump. Can I use t… read more
Jason
Jason
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Vocational, Technical or Trade School
24,123 satisfied customers
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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Vocational, Technical or Trade Scho
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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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What is the correct method apporved by Mercrusier on resealing
What is the correct method apporved by Mercrusier on resealing the raw water pump on a Alpha -one drive Gen 2.… read more
mercmastertech
mercmastertech
Service Manager, Master technician
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I have a 24 ft glastron with a 5.0 motor and the over heat
I have a 24 ft glastron with a 5.0 motor and the over heat alarm went off I changed the thermostat but it still happened . I pulled the impeller and it also looked fine I pulled the plug on top of the… read more
mercmastertech
mercmastertech
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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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