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Prospective purchase. 5.7 mercruiser 350 mag mpi. risers at
Second Opinion] prospective purchase. 5.7 mercruiser 350 mag mpi. risers at 100 degrees, manifolds at 189 or so, both temps via handheld IR temp reader. Temp at guage at helm stays around 175. This wa… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
24,561 satisfied customers
Engine SN: OW673430, mercruiser 5.0 MPI, drive serial num OW927662.
engine SN: OW673430, mercruiser 5.0 MPI, drive serial num OW927662. use boat in saltwater, engine is open cooled system using seawater for cooling. Temp are running between 185 and 205 on gauge on boa… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,409 satisfied customers
I have twin yamaha 250hp 4 strokes engines (2007) I had a
I have twin yamaha 250hp 4 strokes engines (2007) I had a problem with the over heat sensor sounding when in fact the engine was not overheating. I replaced the thermometer sensor, thermostats and ove… read more
Charles
Charles
Certified Mercury Tech
5,752 satisfied customers
I have a 5ltr/305CI.225HP. Chev. V8Engine Volvo Penta 280 Outdrive
I have a 5ltr/305CI.225HP. Chev. V8Engine Volvo Penta 280 Outdrive w/power trim/tilt. I think it's a 1983. I moved it from fresh water to salt water three years ago. last year I put it in the water, d… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
24,561 satisfied customers
I repowered 4 years ago with 2009 TKS 350 motors with 250 hp
I repowered 4 years ago with 2009 TKS 350 motors with 250 hp complete assemblies including new bravo 3,s complete with transom assemblies. 2 years were great. Last year motor was little warm 185 temp … read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
24,561 satisfied customers
I am looking to purchase a 1987,32 Bayliner w/twin 260hp Volvo
I am looking to purchase a 1987,32' Bayliner w/twin 260hp Volvo gas fresh water cooled marine engines. Are there any recorded common problems with these engines I need to be aware of? The "transmissio… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,409 satisfied customers
Ive got a Mercruiser 350 Mag in my 2000 Tige wake-board boat.
I've got a Mercruiser 350 Mag in my 2000 Tige wake-board boat. We had a major service in early June 2012 (fluids, plugs, impeller, etc.) It ran great on our next trip out two weeks later. Then in earl… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,409 satisfied customers
Next question -- I am now trying to decide between two boats
Next question -- I am now trying to decide between two boats as follows: 1. 2005 Cobalt 272 with a MerCruiser 496 Mag (375-hp) w/Bravo 3 drive 2. 2006 Cobalt 272 with a Volvo 8.1L Gi (375-hp) w/duo pr… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,409 satisfied customers
I am considering the purchase or a 90 Sea Ray 42 Cruiser
I am considering the purchase or a '90 Sea Ray 42' Cruiser with two MerCruiser Model 7.4L with 1032 hours on them. How many additional hours do I have before a major overhaul? Thank you, John XXXXX XX… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,409 satisfied customers
hi there, 1997 38 carver sant. runs hot like 210 degrees and
hi there, 1997 38 carver sant. runs hot like 210 degrees and every part has been changed.454s 650 hours and i am afraid to go far because it will overheat.… read more
Jeremy R.
Jeremy R.
5,362 satisfied customers
I HAVE A 1985 CHRIS CRAFT FRESH WATER COOLED MERCRUISER 230
I HAVE A 1985 CHRIS CRAFT FRESH WATER COOLED MERCRUISER 230 THAT GOES UP TO 190 DEGREES AT HIGH SPEEDS 2500 RPM OR HIGHER WHERE SHOULD I START LOOKING FOR THE CAUSE I KNOW IT SHULD BE RUNNING AT 160 D… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,409 satisfied customers
My 5.7L LX merc is overheating. Ran fine day one, day two temp
My 5.7L LX merc is overheating. Ran fine day one, day two temp steady climbs to 250 while at idle. Replaced Thermostat and raw water impeller. no change. I believe the next step is to haul the boat an… read more
Captain Dave
Captain Dave
Charter Captain & I.S. Director
Master's Degree
2,808 satisfied customers
I have recently purchased a used 2004 Crownline 225BR sporting
I have recently purchased a used 2004 Crownline 225BR sporting a 5.7L GXI 350 Mag Volvo Penta and Volvo Penta Duo Prop outdrive. Only to find out later that it was once a salt water vessel. Before eve… read more
K. Kergan
K. Kergan
Inboard/Outboard Mechanic
Vocational, Technical or Trade Scho
1,031 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
Charter Captain & I.S. Director
Master's Degree
2,808 satisfied customers
Hi, I have a 1999 calibria with a 350 mpi mag imboard. on
Hi, I have a 1999 calibria with a 350 mpi mag imboard. on the lake I lost my raw water pump. the temp went to 220, and the alarm sounded. I replaced the pump, and ran the engine with fake a lake, but … read more
Jeremy R.
Jeremy R.
5,362 satisfied customers
2004 had a new 350 mercruiser installed in 1980 boat always
2004 had a new 350 mercruiser installed in 1980 boat always ran at 180 heated up to 220 upon stopping told by installer of motor that it was normal. This year heated up to 200 would not cool down, sho… read more
mercmastertech
mercmastertech
Service Manager, Master technician
Technical School
249 satisfied customers
have a new 350 mag mpi that sat in a dealer lot for the past
have a new 350 mag mpi that sat in a dealer lot for the past 3 years... their mechanics went through it and it ran fine on the lake test. about 1 hr in to the break-in the temp gauge spiked and I had … read more
Captain Dave
Captain Dave
Charter Captain & I.S. Director
Master's Degree
2,808 satisfied customers
I have aXXXXX Tropaz w/twin inboard 350 mercruiser
I have aXXXXX Tropaz w/twin inboard 350 mercruiser v8 engines. 3 yrs ago engines were converted from salt water to salt/fresh water cooled. Port engine continues to over heat in spite of putting new p… read more
Captain Dave
Captain Dave
Charter Captain & I.S. Director
Master's Degree
2,808 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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