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Over heat beep comes on sometimes low rpms i replaced
over heat beep comes on sometimes low rpms i replaced thermostate,water pump thermo senser cleaned o2 senser and alarm came on again after idling for about 5-8 minutes what else could it be? … read more
Shane Creekmore
Shane Creekmore
Certified Mercury Marine technician
High School or GED
531 satisfied customers
False overheating light and buzzer going into limp mode at
False overheating light and buzzer going into limp mode at speeds above 3000 rpm . I replaced impeller last year and just replaced the thermostats. Water pressure is 7 lbs at idle and 20 at speed. I c… read more
CalebA820
CalebA820
Technician
Marine technology
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My boat is overheating and an audible alarm goes off after
my boat is overheating and an audible alarm goes off after the dash temp gauge reaches 200 degrees. … read more
Yachtwork
Yachtwork
Owner Team Yachtwork
Technical or Trade School
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Steady alarm after idling for ten minutes ear muffs on
Steady alarm after idling for ten minutes ear muffs on steady stream 150 hp optimax … read more
Charles
Charles
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I purchased an older engine recently and continue to get the
I purchased an older engine recently and continue to get the high temp alarm. I have a new water pump, discharge looks great, new thermostat and the poppet assembly is cleaned up. It is a 1987 Mercury… read more
Tan
Tan
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Certified Marine Technician
11,409 satisfied customers
Engine gauge reads between 170-175 degrees. Left side of
Engine gauge reads between 170-175 degrees. Left side of engine is getting significantly hotter than the right...I will burn my hand almost instantly if I touch the exhaust manifold. Water circulation… read more
Jason
Jason
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Vocational, Technical or Trade School
22,043 satisfied customers
I ran my 2009 Yamaha F20msh for about a hour on the lake with
I ran my 2009 Yamaha F20msh for about a hour on the lake with no inital problems. Then we shut it off and parked for for 3 hrs. When I returned and cranked it back up and took off, 10 minutes into our… read more
Jason
Jason
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Vocational, Technical or Trade School
22,043 satisfied customers
I have a 1998 Promax 225 that has the overheat sensor going
I have a 1998 Promax 225 that has the overheat sensor going off we have tested the water temp with a thermometer and it is in the normal range… read more
Jeff G.
Jeff G.
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Vocational, Technical or Trade Scho
4,730 satisfied customers
Hello, I have a 2004 mercury 200 efi saltwater edition. I
Hello, I have a 2004 mercury 200 efi saltwater edition. I intermittently get water temperature sensor fault alarm, but after a shutoff and restart it went away. Now I get temps around 100 when running… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,409 satisfied customers
i have a 1994 evinrude200xt,i am getting a buzz alarm losing
i have a 1994 evinrude200xt,i am getting a buzz alarm losing all most power;it is telling me it is over heating,i have a steady stream of water coming out ,don't know how strong of stream i should hav… read more
Jeff G.
Jeff G.
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Vocational, Technical or Trade Scho
4,730 satisfied customers
Honda 2002 F12X Turbo PWC. You guys have done a great job helping
Honda 2002 F12X Turbo PWC. You guys have done a great job helping out on my boat. Lets see if you can help me on my jet ski. Had the ski for 7 years. Changed oil and plugs every year and lubed and tha… read more
TIMOTO
TIMOTO
Bachelor's Degree
162 satisfied customers
hi, i have an aqad31a,my tempreture gauge is staying around
hi, i have an aqad31a,my tempreture gauge is staying around 150 when im steaming around and then when i slow down it goes up to about 200+ and then slowly comes back down to 150 again,ive changed my t… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,409 satisfied customers
I have twin 454 340 hp 7.4 inboards in a 1985 wellcraft 32.
I have twin 454 340 hp 7.4 inboards in a 1985 wellcraft 32'. Raw water cooled. Port engine overheats under load above 2000 rpm with a 140 degree t' stat and never gets up to good temp with t stat remo… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,409 satisfied customers
I have a Mariner Optimax 135 HP outboard (2005 mod). The issue
I have a Mariner Optimax 135 HP outboard (2005 mod). The issue is that at idle speed the temperature stays steady at about 140 degrees F, and by increase the engine speed to about 1600 rpm the tempera… read more
Jason
Jason
Associate Degree
210 satisfied customers
I have a 2005 searay with v6 mercruiser, just had it in for
I have a 2005 searay with v6 mercruiser, just had it in for service as temp was continuing to rise, mechanic changed impellor in water pump and said it is now running fine. the temp is still rising wi… read more
Jeff G.
Jeff G.
Marine Mechanic
Vocational, Technical or Trade Scho
4,730 satisfied customers
1997 Mariner V-6 135 hp. Serial # XXXXX used only in lake
1997 Mariner V-6 135 hp. Serial # XXXXX used only in lake water 225 hours on engine.Replaced Water pump, & T-Stats in May 2009. When running just off plane engine temp gauge spikes to 195-200 degrees.… read more
ROCKET
ROCKET
MASTER CERTIFIED TECH
Vocational, Technical or Trade Scho
426 satisfied customers
I have a 1986 mercruiser that overheats at idel speed. I have
I have a 1986 mercruiser that overheats at idel speed. I have changed the lower unit impeller, and thermostat with no luck. The new thermostat rating is 140 degrees, but at high speed the engine runs … read more
Dominick
Dominick
Marine Mechanic
Vocational, Technical or Trade Scho
1,009 satisfied customers
I have a 1999 115hp yamaha 2stroke engine, It idles or at low
I have a 1999 115hp yamaha 2stroke engine, It idles or at low speed, but when you throtle up after a few minutes the alarm goes off, then it idle rough put new water pump on,but still the alarm goes o… read more
Larry B.
Larry B.
Marine Service Tech
High School or GED
574 satisfied customers
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Meet the Experts:

Ted G.

Ted G.

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

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Jason

Jason

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Tan

Tan

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Jeff G.

Jeff G.

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Captain Dave

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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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