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Replaced water impeller, boat runs at max 160 degrees on ear
replaced water impeller, boat runs at max 160 degrees on ear muffs. on the lake, runs about 160 at higher rpms. at idle in gear heats up over 180. is this normal? … read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,409 satisfied customers
Just took my four Winn's H190 out for the first time this
Just took my four Winn's H190 out for the first time this year, thought I had flushed it correctly,however once on the water all I got was alarm beeping and temp rising on the temp gauge, boat would l… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
22,043 satisfied customers
Mercruiser 6.2, 2006 overheats at both idle and speed. The
mercruiser 6.2, 2006 overheats at both idle and speed. The following performed: … read more
Jason
Jason
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Vocational, Technical or Trade School
22,043 satisfied customers
I have a 2008 Honda 20 horse 4 stroke outboard. Impeller was damaged as all fins were gone
I have a 2008 Honda 20 horse 4 stroke outboard. Impeller was damaged as all fins were gone. I replaced impeller and water pump. When I start it up, water seems to flow freely. When I increase speed, i… read more
Jason
Jason
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Vocational, Technical or Trade School
22,043 satisfied customers
Hello Jason Captain Black here. I have a mid 90s 5.7 Mercruiser
Hello Jason Captain Black here. I have a mid 90's 5.7 Mercruiser setup straight inboard Raw water cooled, sherwood belt driven raw water pump. No thermostat in redistribution housing, today blew off l… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
22,043 satisfied customers
I have 1986 Larson with a 3.0 L OMC Cobra. Motor runs at about
I have 1986 Larson with a 3.0 L OMC Cobra. Motor runs at about 160 degrees when at less than 1/4 throttle in forward gear. At 3/4 throttle engine overheats and has to be throttled down. Checked impell… read more
orcamarine
orcamarine
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Vocational, Technical or Trade Scho
7 satisfied customers
My son turned over the engine on my 1986 Four winns inboard
My son turned over the engine on my 1986 Four winns inboard outboard motor. He said the engine turned over and then he shut it off. There was no water hose connected to the outdrive. I had been runnin… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
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130 hp volvo in four winns with salt water flush a ran with
130 hp volvo in four winns with salt water flush a ran with water attached to salt water flush hose wheb warm up i detached water hose and wirh engine running poured 12 litres of anti freeze down salt… read more
Ted G.
Ted G.
Rigger, Diagnostician
Vocational, Technical or Trade Scho
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Top of inboard engine says Mercruiser 85784. Was told it is
Top of inboard engine says Mercruiser 85784. Was told it is a 4 cylinder. Numbers on side of motor are 426.33 and 21420. Boat runs fine in driveway but took to lake and head gasket blew. Was told whoe… read more
Captain Dave
Captain Dave
Marine Mechanic
Master's Degree
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1986 Mercruiser 140 HP in line 4. Engine #A586058 Model#2140W Overheating
1986 Mercruiser 140 HP in line 4. Engine #A586058 Model#2140W Overheating? Have replaced thermostat and still overheats. Have run without thermostat and still overheats. My thinking is either the wate… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,409 satisfied customers
have an overheating issue on an old mercruser 302 888 sterndrive.
have an overheating issue on an old mercruser 302 888 sterndrive. replaced the thermostat, replaced the water pump in the drive. Its an older boat 1974 but it was not used very often at all. I have ta… read more
K. Kergan
K. Kergan
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Vocational, Technical or Trade Scho
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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.
Marine Mechanic
Vocational, Technical or Trade Scho
4,730 satisfied customers
when running my 120 mercruiser inboard with muffs how much
when running my 120 mercruiser inboard with muffs how much water should come out of the exhaust bellows in the rear of the boat and what temp should my motor run?… read more
Master Tech
Master Tech
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Vocational, Technical or Trade Scho
1,167 satisfied customers
I have a 1987 Galaxy boat with a mercruiser 3.0 alpha one inboard/outboard
I have a 1987 Galaxy boat with a mercruiser 3.0 alpha one inboard/outboard engine. I had this boat in the water and it overheated with me and cut off. I have since changed the thermostat and put it ba… read more
Master Tech
Master Tech
Service Manager/Technician
Vocational, Technical or Trade Scho
1,167 satisfied customers
I have a water leak around the starter area and the intake
I have a water leak around the starter area and the intake manifold does not seem to be getting water.. Also this is my first inboard and do not know if the water pump is located on the lower unit or … read more
briggs archer
briggs archer
master marine mechanic
Associate Degree
402 satisfied customers
I HAVE A 4.3L 2004 MERCRUISER. ENGINE IS OVERHEATING. HOW
I HAVE A 4.3L 2004 MERCRUISER. ENGINE IS OVERHEATING. HOW DOES ONE CHECK THEROMSTAT OR IMPELLER. RUNS GOOD, HAS NOT BEEN RUN MUCH IN LAST YEAR. TOOK OUT FOR SPIN, HEATED UP TO ALARM WHEN GOING FULL SP… read more
Infiniti Nissan Specialist
Infiniti Nissan Specialist
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915 satisfied customers
I have a 7.4 with a Bravo 3 drive in a Four Winns 240. I keep
I have a 7.4 with a Bravo 3 drive in a Four Winns 240. I keep it moored in salt water. I have just started having overheating problems. When idling and running at low speeds (say less than 3000 rpm) i… read more
Pappy's Sales and Service
Pappy's Sales and Service
Vocational, Technical or Trade Scho
586 satisfied customers
I have a 87 140 hp mercruiser. The engine tempature is fine
I have a '87 140 hp mercruiser. The engine tempature is fine at idle speed but overheats at running speeds. The water pump appears to pump plenty of water on the water hose. What do you think?… read more
davesoutboard
davesoutboard
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Meet the Experts:

Ted G.

Ted G.

Rigger, Diagnostician

2,678 satisfied customers

40 years boating, Safe boating instruct., Offshore Race promoter, Failure Analysis, Expert Witness

Dominick

Dominick

Marine Mechanic

1,009 satisfied customers

25 Years Experience as Mechanic, 20 Yrs Boat Yard Owner/Mechanic, Factory Certified

John White

John White

Marine Mechanic

306 satisfied customers

11 years experience working on outboards, inboards, sterndrives & pwcs

Jason

Jason

Marine Mechanic

22,043 satisfied customers

Degree in Marine Technology. Gas and diesel marine mechanic.

Tan

Tan

MerCruiser Certified Technician

11,409 satisfied customers

40 yrs. experience with complete engine repairs both inboard/outboard and MerCruiser Certified Technician.

Jeff G.

Jeff G.

Marine Mechanic

4,730 satisfied customers

42 years experience, Certified Master Technician, All Major Outboards, Sterndrives, Hi-Performance

Captain Dave

Captain Dave

Marine Mechanic

2,672 satisfied customers

USCG Licensed Captain, 20+ Years Boating, Fishing, Maintenance and Repair Experience

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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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