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I have a 2003 Searay w twin 350 Mags and brovo 3 drives raw
I have a 2003 Searay w twin 350 Mags and brovo 3 drives raw water cooled, Starboard motor is running about 135, port motor is running 170 both motors have a new thermostat put in last week what is a n… read more
Noel Schembri
Noel Schembri
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Diploma
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I own a 2001 Chaparral Sunesta powered by a Mercruiser
I own a 2001 Chaparral Sunesta powered by a Mercruiser 5.0 EFI engine. The manual isn't really helpful in identifying exactly what drains I should expect to find on my boat. Here's what it says: "Remo… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
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I have a pair of 5.7's V8 Crusaders in a boat I just had
I have a pair of 5.7's V8 Crusaders in a boat I just had surveyed. Port engine was not running the same RPM as starboard on sea trial and compression test showed 160, 155, 135, 135 115, 140, 135, 135.… read more
Tan
Tan
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Port F150 overheat alarm sounded, Shut down. Restarted after
Port F150 overheat alarm sounded, Shut down. Restarted after short rest. Tell tale working, Gauge indicated normal temp. Engine did not want to run over 2000rpm. Back to home on starboard engine. At i… read more
Jason
Jason
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Vocational, Technical or Trade School
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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
Certified Marine Technician
11,409 satisfied customers
I have twin Volvo Penta 8.1 Gil-F engines in a V-drive configuration.
I have twin Volvo Penta 8.1 Gil-F engines in a V-drive configuration. My port engine runs hot when in idle. If I am running at speed or if I have at least 1500 RPM it cools fine. I have changed the im… read more
Jason
Jason
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Vocational, Technical or Trade School
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I believe this might be addressed to James........ I have
I believe this might be addressed to James........ I have a 43" 1991 Bayliner 4387 powered by twin Mercruiser 7.4L engines with 950 hours each. It is a closed system. The boat is in salt wter. The ris… read more
James
James
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Vocational, Technical or Trade Scho
4,094 satisfied customers
I have a 2006 Yamaha SX230 that is not ejecting water out of
I have a 2006 Yamaha SX230 that is not ejecting water out of either of the starboard side ports either in the water or with the flush system attached. I am not getting any overheat dispite operating f… read more
orcamarine
orcamarine
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Vocational, Technical or Trade Scho
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I have a 1999 Stingray with a 4.3 mercruiser sterndrive. I
I have a 1999 Stingray with a 4.3 mercruiser sterndrive. I started the engine for the first time the year ( on the trailer, with garden hose attached ). A lot lore water exited the exhaust ports on th… read more
Jason
Jason
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Vocational, Technical or Trade School
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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
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I just had a new 3.0 Mercruiser motor, transom plate, and outdrive
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James
James
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Vocational, Technical or Trade Scho
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Recently installed CMI ETOPS on a 496Mag Ho murcruiser, 26
Recently installed CMI ETOPS on a 496Mag Ho murcruiser, 26 Baja Outlaw. They are working without issue, but noticed that while in neutral water is ejected out of the starboard exhaust only. I've been … read more
James
James
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Vocational, Technical or Trade Scho
4,094 satisfied customers
Hello again!, Tonights question is Have I damaged my newly
Hello again!, Tonight's question is "Have I damaged my newly rebuilt Mercruiser engine?" Both of my "Big block" Mercruiser engines were rebuilt last summer. During the winter I often run them while st… read more
Scott Martin
Scott Martin
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Vocational, Technical or Trade Scho
167 satisfied customers
After a couple of hour run at least 3/4 throttle, my 1999 Mercruiser
After a couple of hour run at least 3/4 throttle, my 1999 Mercruiser 4.3 risers doesn't seem to be heating equally. The starboard riser seems it's normal hot to touch, while the port riser is barely w… read more
Dominick
Dominick
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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
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Vocational, Technical or Trade Scho
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a new Mercruiser 260hp EFI engine.in a 2000 230 Bowrider SEARAY
a new Mercruiser 260hp EFI engine.in a 2000 230 Bowrider SEARAY I have the starboard side of the exhaust manifold much hotter than the port side while running the motor. I can put my hand on the port … read more
Dr Hamman
Dr Hamman
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1984 235 HP 5.0 over heats, stbd side flows better than port,
1984 235 HP 5.0 over heats, stbd side flows better than port, risers and manifold are clear what gives?… read more
briggs archer
briggs archer
master marine mechanic
Associate Degree
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I ran aground in sand with a Mercruiser 3.0 engine. Boat runs
I ran aground in sand with a Mercruiser 3.0 engine. Boat runs fine but limited exhaust water coming out of port side but strong on starboard side. Temp guage now doesn't work and engine stays real coo… read more
Mechman45
Mechman45
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Meet the Experts:

Ted G.

Ted G.

Rigger, Diagnostician

3,332 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

24,617 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

Noel Schembri

Noel Schembri

Marine Mechanic

2,759 satisfied customers

Advanced technical diploma

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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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