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2008 350 MAG MPI Brovo 3 Runs Hot. temperature spikes to 175
2008 350 MAG MPI Brovo 3 Runs Hot. temperature spikes to 175 - 180 after about 15 minutes at about 3,000 - 3,500 RPM. Tested in neutral for about 30 minutes at 1300 RPM and temp held steady at 150. No… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
22,848 satisfied customers
Just from a previous issue of overheating issue... My
Hi , just a follow up from a previous issue of overheating issue... … read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
22,848 satisfied customers
I am seeking help with a cooling problem with 2007
I am seeking help with a cooling problem with 2007 Mercruiser 350 MAG MPI with a Bravo III drive. Need an experienced mechanic with experience on this specific engine. … read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
22,848 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
Marine Mechanic
Vocational, Technical or Trade School
22,848 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
22,848 satisfied customers
I have a 2014 Mercruiser 5.7 fresh water cooled. It
I have a 2014 Mercruiser 5.7 fresh water cooled. It overheated yesterday. I put a gallon of coolant in tonight and ran it. It stayed at 160-170 at dock idling for 15 minutes. I took it for a ride and … read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
22,848 satisfied customers
Mercruiser 5.0L 260 Bravo3 overheated after getting stuck on
Mercruiser 5.0L 260 Bravo3 overheated after getting stuck on sand bar; was throttling down maybe a minute after alarm sounded; engine died; let cool, wouldn't turnover. Hydrolocked. Pulled plugs, had … read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
22,848 satisfied customers
We bought a 2006 Sea Ray Sundeck with a 350 Bravo III I/O and
We bought a 2006 Sea Ray Sundeck with a 350 Bravo III I/O and the owner said that it had an overheating problem last year but they replaced the impeller and everything was fine. We've had her out 5 ti… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
22,848 satisfied customers
I have a mercruiser 8.2l with bravo 3, and changed the impeller
I have a mercruiser 8.2l with bravo 3, and changed the impeller on the raw water flow. However ow I'm getting low water flow. Do I need to bleed the air valve… read more
Jason
Jason
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Vocational, Technical or Trade School
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I have a 23.6 eliminator with a 1997 mercursier 502 mpi, bravo
I have a 23'.6 eliminator with a 1997 mercursier 502 mpi, bravo 1 drive. new manifolds, salt water cooled. now steam is coming though the through hull exhaust and over heats at high rmp to where the a… read more
Noel Schembri
Noel Schembri
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Diploma
2,627 satisfied customers
Hello, I have a 4.3 litre V6 MPI mercruiser with Alpha outdrive.
Hello, I have a 4.3 litre V6 MPI mercruiser with Alpha outdrive. Have problems with marine groth in the seawater inlet system through the outdrive and therefore want to convert to direct seawater inle… read more
Noel Schembri
Noel Schembri
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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
MerCruiser Certified Technician
Certified Marine Technician
11,409 satisfied customers
Hi, i need to know how the sea pick up water flow thru the
Hi, i need to know how the sea pick up water flow thru the engine as only one elbow is cooled but the right one is hot.Also the stop valve inside the exhaust pipe is burn. The engine is a 5.L mercruis… read more
Tan
Tan
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Certified Marine Technician
11,409 satisfied customers
Yesterday our boat searay 260 would idle fine getting on
yesterday our boat searay 260 would idle fine getting on plane it got and the alarm would go off we got a new impeller on and a new thermostat and today it did the same thing it still idles fine but i… read more
K. Kergan
K. Kergan
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1,031 satisfied customers
My 5.0 2004 merc cruiser in a 24 sea ray sundeck has intermittent
My 5.0 2004 merc cruiser in a 24' sea ray sundeck has intermittent overheating. ranges from 155 to 185. does not get much hotter than 185 but of course alarm spounds arount 177. Did this last week so … read more
Jason
Jason
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Vocational, Technical or Trade School
22,848 satisfied customers
What is a good asking price for a 2004 Sea Ray sundeck with
What is a good asking price for a 2004 Sea Ray sundeck with following specs: Hours=400 Mercruiser 5.0L MPI BR3, 260 HP owner just spent $5k replacing 2 cast iron engine manifolds used to cool engine d… read more
Tan
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Certified Marine Technician
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I have a 2007 5.0 Liter MPI Bravo Three sterndrive and the
I have a 2007 5.0 Liter MPI Bravo Three sterndrive and the mechanic said I needed a new impeller because the engine is overheating. What is it or what does that mean, please?… read more
James
James
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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.
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Vocational, Technical or Trade Scho
4,730 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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