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I found water in my manifold and my mechanic has excused it
I found water in my manifold and my mechanic has excused it being a from failing riser (my thoughts) . The manifold shows most corrosion in center manifold . He thinks there was too much water to be r… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade Scho
17,310 satisfied customers
I have a 1987 four winns with a 7.4 L mercruiser I just had
I have a 1987 four winns with a 7.4 L mercruiser I just had the engine rebuilt and I put everything on and ran it. My exhaust manifolds are getting hot so I'm wondering if I plumbed them properly. Doe… read more
Tan
Tan
MerCruiser Certified Technician
11,496 satisfied customers
i have twin Mercruiser 305 ci (MIE228) in a 1978 Bertram 28
i have twin Mercruiser 305 ci (MIE228) in a 1978 Bertram 28 the port engine has been overheating with the temp gauge showing rapid increase at higher rpm, then dropping when rpms are reduced and engin… read more
Tan
Tan
MerCruiser Certified Technician
11,496 satisfied customers
Hi Tom. I own a 2000 mercrusier 454 serial number 0l621200.
Hi Tom. I own a 2000 mercrusier 454 serial number 0l621200. I have been experiencing these problems over the past two seasons. The starboard side of my single engine is running 30 deg hotter then port… read more
Tan
Tan
MerCruiser Certified Technician
11,496 satisfied customers
Hi. I have a 94 Rinker captiva with a 4.3l mercruiser. I just
Hi. I have a 94 Rinker captiva with a 4.3l mercruiser. I just had the motor rebuilt from the oil pan up. As it did last year, the motor hydrolocked again. Everything was running fine. About three week… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade Scho
17,310 satisfied customers
98 5.7l mercruiser. Ive had over heating issues for the past
98' 5.7l mercruiser. I've had over heating issues for the past two years.1st had almost full blown fire. Shop replaced bellows, impellor,thermostat and more. The SS hose clamps were almost melted. Fir… read more
Jeff G.
Jeff G.
Marine Mechanic
Vocational, Technical or Trade Scho
4,729 satisfied customers
I replaced my raw water pump impeller and now i have water
I replaced my raw water pump impeller and now i have water leaking from the plugs in both the exhaust mainfold just before the riser. More water is coming out of the starboard side then the port side … read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade Scho
17,310 satisfied customers
I just bought a 1986 regal with twin 190 merc engines. I am
I just bought a 1986 regal with twin 190 merc engines. I am losing water on the starboard motor in the fresh water cooled side of motor. The engine ran hot above 200, the water is going out somewhere.… read more
Tan
Tan
MerCruiser Certified Technician
11,496 satisfied customers
I have a lift-kept Sea 29 in maryland with twin MCM 5.0 EfI
I have a lift-kept Sea 29 in maryland with twin MCM 5.0 EfI mercruisers 1999-2001. I want to make it easier to winterize and reuse during the winter months. I am trying to decide between the san juan … read more
KKassel
KKassel
OWNER
High School or GED
381 satisfied customers
One of my engines is overheating at a slow rate. The raw water
One of my engines is overheating at a slow rate. The raw water cooled engine temperature normally sits at 175 degrees, but has been increasing slowing (over past 8 months) to 200 degrees at present. R… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade Scho
17,310 satisfied customers
I have a Rinker 232 with a mecruiser 5.0l alpha one engine
I have a Rinker 232 with a mecruiser 5.0l alpha one engine with steam coming from the exhaust. Cleaned both risers and replaced the thermostat but still have the same problem. Starboard riser is also … read more
Noel Schembri
Noel Schembri
Marine mechanic
Diploma
1,780 satisfied customers
I have a 1996 5.7 volvo penta ran great onshore got wet on
I have a 1996 5.7 volvo penta ran great onshore got wet on monday ran for 30 mins than quit at dock discovered it had hydrolocked . What would be the main cause for this ? already removed the water an… read more
Tan
Tan
MerCruiser Certified Technician
11,496 satisfied customers
I have a near new Rinker power boat that has a 8.1 litre volvo
I have a near new Rinker power boat that has a 8.1 litre volvo penta dirve system. Last fall I could not start it as water got into the rear starboard engine cylinder. we got the water out and the boa… read more
Tan
Tan
MerCruiser Certified Technician
11,496 satisfied customers
I have a 2002 350 Horizon MPI (Self contained), it recently
I have a 2002 350 Horizon MPI (Self contained), it recently hydo-locked (fresh water) thought it was abad starter and then realized the motor was seized pulled the plugs and equal amounts of water in … read more
Jeremy R.
Jeremy R.
5,362 satisfied customers
I have a 1988 Mastercraft with 351 that will rise in temperature
I have a 1988 Mastercraft with 351 that will rise in temperature to 190-200 in about 10 minutes of operation. If I slow down and idle, it cools back to 160 and stay there. I have replaced raw water pu… read more
Tan
Tan
MerCruiser Certified Technician
11,496 satisfied customers
i have a 88 carver santego with twin 98 4.3 ltr mercruisers.
i have a 88 carver santego with twin 98' 4.3 ltr mercruisers. the port motor starts up fine and idles up to wot (wide open throttle) fine at the dock when not in gear. but when underway with drive eng… read more
capt ron 1959
capt ron 1959
Owner/Marine Mechanic
Vocational, Technical or Trade Scho
348 satisfied customers
I have a 5.0l Mercruiser. A few minutes after starting the
I have a 5.0l Mercruiser. A few minutes after starting the engine, the water from the thermostat housing to the engine water circulating pump, and the starboard manifold becomes very hot, the water to… read more
capt ron 1959
capt ron 1959
Owner/Marine Mechanic
Vocational, Technical or Trade Scho
348 satisfied customers
I have a 2005 Rinker 320 wit twin 5.0 s. The port engine runs
I have a 2005 Rinker 320 wit twin 5.0 's. The port engine runs 10 - 15 degrees hotter(195-195) than the starboard engine (175) when warmed up and under way. The port risers are hotter to touch than th… read more
Captain Dave
Captain Dave
Marine Mechanic
Master's Degree
2,672 satisfied customers
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Meet the Experts:

Dominick

Dominick

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Jason

Jason

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Tan

Tan

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Jeff G.

Jeff G.

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4,729 satisfied customers

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Captain Dave

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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