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2000 mercruiser 350 MPI, open cooling system. changed sea
2000 mercruiser 350 MPI, open cooling system. changed sea water pump, re circulation pump and thermostat. Running on hose, thru flush port or Muffs engine wil come to temp (160) , as soon as I bring u… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
18,955 satisfied customers
I changed the lower unit in a pre alpha stern drive. When I
I changed the lower unit in a pre alpha stern drive. When I installed it and ran the engine no water was being pumped to the engine for 4 to 5 min. It appears to have gotten fairly hot because the wat… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
18,955 satisfied customers
Port engine is heating up to 192, replaced manifolds,
Port engine is heating up to 192, replaced manifolds, thermostat and impeller, pumps plenty of water and risers are not hot to touch, thinking maybe a temp sensor? … read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
18,955 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
18,955 satisfied customers
Poor water flow out the port side exhaust. I already
Poor water flow out the port side exhaust. I already replaced risers and checked water pump. All good. Shutter is missing on port side so the old shutter might be lodged in the exhaust. Not sure how t… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
18,955 satisfied customers
I have a 1995 Sanger DXII, has a recent rebuilt 5.7L
I have a 1995 Sanger DXII, has a recent rebuilt 5.7L Mercruiser engine and rebuilt transmission. Took it out this weekend and about 10 minutes past boat ramp it the overtemp horn sounded. Oil Pressure… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
18,955 satisfied customers
I have 1993 2859 Bayliner with 7.4L Mercruiser, Bravo II.
Hello I have 1993 2859 Bayliner with 7.4L Mercruiser, Bravo II. Last year ran ok but suddenly reached 180F on dashboard guage, I checked impellor and looked ok and replaced it anyway. Replaced thermos… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
18,955 satisfied customers
I have a 2006 8.1 horizon that is getting hot on one side.
I have a 2006 8.1 horizon that is getting hot on one side. The port engine was running hotter then the starboard so I changed the thermostat, and sending unit, impeller, put it all back together with … read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
18,955 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
18,955 satisfied customers
Hey Jason, I have twin bravo 3 drives with 496 mercs. My Starboard engine runs 30 degrees
Hey Jason, I have twin bravo 3 drives with 496 mercs. My Starboard engine runs 30 degrees hotter than port and the exhaust overheat alarm sounds above 3400 rpm and guardian kicks in. The temp gauge sh… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
18,955 satisfied customers
Have 2001 Baja 212 Islander with 6.2 Mercruiser MX EFI with
Have 2001 Baja 212 Islander with 6.2 Mercruiser MX EFI with Bravo One outdrive. I have noticed that the starboard riser eventually gets to hot to touch for longer than a second, the port riser is warm… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
18,955 satisfied customers
Hello! I have a 2002 5.0 carb seawater cooled Mercruiser
Hello! I have a 2002 5.0 carb seawater cooled Mercruiser with Brovo 2. I was performing winterization. After draining the water from the engine i filled the engine with glycol from the thermostat conn… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
18,955 satisfied customers
1997 mercruiser 7.4 low hours, fresh water use only, manifolds
1997 mercruiser 7.4 low hours, fresh water use only, manifolds too hot to touch! I replaced impeller,checked water flow with earmuffs,enginr temp is ok at 160 degrees. I pulled off starboard riser it … read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
18,955 satisfied customers
I have an an 88 wellcraft with an 3.0 mercruiser I/0 apha one
I have an an 88 wellcraft with an 3.0 mercruiser I/0 apha one gen 1 and believe I have a small blockage from the manifold riser down to exit port.. what is the best way to flush it out and how? it may… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
18,955 satisfied customers
Local boat shop found the water pump burnt out, said the motor
Local boat shop found the water pump burnt out, said the motor overheated and melted the shift cable making it hard to shift. They got that fixed,( said they rebuilt the water pump and replaced the sh… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
18,955 satisfied customers
5.7L raw water cooled. Starboard side riser running too hot
5.7L raw water cooled. Starboard side riser running too hot to touch. Changed the riser with a new one, no difference. Still running hot on the one side.… read more
James
James
Certified Marine Mechanic
Vocational, Technical or Trade Scho
4,094 satisfied customers
Background Recently bought a 33ft, 5 ton launch with a 1997
Background Recently bought a 33ft, 5 ton launch with a 1997 Mercruiser 7.3 D-tronic V8 diesel and bravo 2 stern leg (570 hours). Had pre-purchase inspection of engine & leg done by local Mercruiser gu… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
18,955 satisfied customers
I am about to replace the raw water manifolds on a year 2000
I am about to replace the raw water manifolds on a year 2000 2bbl mercruiser engine /bravo 1 combination equipped with the factory mercruiser freshwater cooling kit. Engine has seawater pump low starb… read more
John White
John White
Marine Mechanic
Vocational, Technical or Trade Scho
306 satisfied customers
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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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