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Keeps over heating in about 3 min. No load just idle if.
Keeps over heating in about 3 min. No load just idle if … read more
Yachtwork
Yachtwork
Owner Team Yachtwork
Technical or Trade School
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We have a 2008 Natique 230 that is overheating? Does the2008
Does the2008 Natutique 230 have an impeller. We looked at our sea strainer and it wasn't dirty but wonder if there could be a clog somewhere? … read more
Ted G.
Ted G.
Rigger, Diagnostician
Vocational, Technical or Trade Scho
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2003 Volvo penta 4.3gl sounding an audible alarm. Oil was
2003 Volvo penta 4.3gl sounding an audible alarm. Oil was changed and pressure is checking out good on gauges. Temp gauge is off though according to mechanic reading 30 degrees too hot. When tested in… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
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My boat runs a Jabsco 50410 engine cooling pump on the raw
My boat runs a Jabsco 50410 engine cooling pump on the raw (sea) water side of the closed cooling system. It was working well but I replaced the impeller proactively, and now it won't draw water and p… read more
Jason
Jason
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Vocational, Technical or Trade School
22,043 satisfied customers
Mastercraft Prostar 190, 1986 with stock 351, isnt cooling
Mastercraft Prostar 190, 1986 with stock 351, isn't cooling reliably. It is a water delivery problem.… read more
Tan
Tan
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Penta 5.0 is overheating. Put in the water and it goes up
Penta 5.0 is overheating. Put in the water and it goes up to 240 after throttling up. Took it back to dock and pulled hoses off front of exhaust manifold and getting almost no water flow. Please help!… read more
Tan
Tan
MerCruiser Certified Technician
11,507 satisfied customers
I have a 2001 Super Air Natique. It has started overheating.
I have a 2001 Super Air Natique. It has started overheating. I clean the filter screen and container and reinstalled the container. I checked under the boat and there is nothing plugging the intakes. … read more
Whitecap36
Whitecap36
Service Manager/Technician
Vocational, Technical or Trade Scho
1,557 satisfied customers
Volvo cooling problem. 4.3 v6. Was overheating, changed impeller.
Volvo cooling problem. 4.3 v6. Was overheating, changed impeller. Now has problem taking a prime, at put in will overheat unless I rec engine over 3000 rpm. After that it will cool down and stay cool … read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
22,043 satisfied customers
I have a 1988 60HP Mercury (s/n 0B240204) on a Tracker Pontoon.
I have a 1988 60HP Mercury (s/n 0B240204) on a Tracker Pontoon. When running above 4000RPM, the over heat horn sounds and stays on til you idle back down and then stays off provided you do not run abo… read more
Jeff G.
Jeff G.
Marine Mechanic
Vocational, Technical or Trade Scho
4,730 satisfied customers
I have restored a 1974 Chris Craft XK-19 boat. Fresh water
I have restored a 1974 Chris Craft XK-19 boat. Fresh water use only - no salt water use. It now has a 2007 Chevy 350 replacement crate motor. It uses the log style, wet marine manifolds with "hump ris… read more
Whitecap36
Whitecap36
Service Manager/Technician
Vocational, Technical or Trade Scho
1,557 satisfied customers
Have 1987 Searay 268 dancer with 7.4 L, alpha drive. Overheated,
Have 1987 Searay 268 dancer with 7.4 L, alpha drive. Overheated, shut down immediately and towed back to dock. Restarted after cooling. No overheat but exhaust starts smoking when engine revved to 350… read more
Tan
Tan
MerCruiser Certified Technician
11,507 satisfied customers
Mercruiser model 470 overheating, has a closed cooling system. What
Mercruiser model 470 overheating, has a closed cooling system. What to look for. intake impeller? thermostat? Is there a diagram for repair or replace?… read more
Captain Dave
Captain Dave
Marine Mechanic
Master's Degree
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1996 Donzi with a 350 Mercruiser I/O. I picked up this boat
1996 Donzi with a 350 Mercruiser I/O. I picked up this boat at a reasonable price, but it needed some help. I have been trying to troubleshoot an overheating issue. I have replaced the risers and had … read more
James
James
Certified Marine Mechanic
Vocational, Technical or Trade Scho
4,094 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.
Marine Mechanic
Vocational, Technical or Trade Scho
4,730 satisfied customers
1988 3.0 omc engine, bad overheating problem, had new impeller
1988 3.0 omc engine, bad overheating problem, had new impeller thats pumping water ok, checked water pump, thats ok, new thermostat, took of manifold endplate, very mucky in there, like a black greasy… read more
Master Tech
Master Tech
Service Manager/Technician
Vocational, Technical or Trade Scho
1,167 satisfied customers
Hi - I have a 96 Searay w/7.4LX Merc sterndrive. Yesterday
Hi - I have a 96 Searay w/7.4LX Merc sterndrive. Yesterday it overheated while at idle in the marina (seawater impeller shot) and pegged the temp gauge. After I shut it down and let it cool a little, … read more
mercmastertech
mercmastertech
Service Manager, Master technician
Technical School
249 satisfied customers
recurrent overheat problem on yamaha 25 hp 4 stroke. replaced
recurrent overheat problem on yamaha 25 hp 4 stroke. replaced impeller but still overheat alarm after running 5 min at 50%. if I hook up water hose to the top of the engine at the hose hookup, no over… read more
Captain Dave
Captain Dave
Marine Mechanic
Master's Degree
2,672 satisfied customers
My husband and I just bought at 1975 28 Cape Dory sloop.
My husband and I just bought at 1975 28' Cape Dory sloop. It has a md2b Volvo engine. We were taking it north to our slip and after about 6 hours the engine overheated and my husband is stranded now a… read more
Captain Dave
Captain Dave
Marine Mechanic
Master's Degree
2,672 satisfied customers
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Meet the Experts:

Ted G.

Ted G.

Rigger, Diagnostician

2,698 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

11,507 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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