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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
11,507 satisfied customers
I have a1990 Sea Ray with 7.4 MerCruiser Took out first time
I have a1990 Sea Ray with 7.4 MerCruiser Took out first time after couple of years in dry storage. Checked everything. Fresh fuel Rebuilt carb. In the water engine purred like a kitten. Got temp up to… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,507 satisfied customers
Tan My starboard engine runs about 20 degrees hotter than
Tan My starboard engine runs about 20 degrees hotter than port. At item the discrepancy is not noticeable but as Rpms increase it plays itself out… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,507 satisfied customers
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
11,507 satisfied customers
what causes a 7.4 to run 200 degrees when its twin runs 175
what causes a 7.4 to run 200 degrees when its twin runs 175 degrees. I have changed everthing then I crossed wired everthing to the port motor.It still runs 200 deg. Ive used a laser temp. gun and com… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
22,804 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
Inboard/Outboard Mechanic
Vocational, Technical or Trade Scho
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
Marine Mechanic
Vocational, Technical or Trade School
22,804 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
11,507 satisfied customers
tamd61a rebuilt by vp agent 4yrs ago engine cooler cleaned
tamd61a rebuilt by vp agent 4yrs ago engine cooler cleaned by serks 2 yrs ago new stat this month over heats over 1500rpm heats up quicker than opposite engine runs cold at low revs never been right s… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
22,804 satisfied customers
i have a 1999 7.4 mpi horizon v drive. this engine is fresh
i have a 1999 7.4 mpi horizon v drive. this engine is fresh water cooled. after engine warms up the raw water side starves for water as if there is a blockage or raw water pump problem. it pumps enoug… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,507 satisfied customers
I have a 2004 Volvo Penta 5.7 GXI , 280 Hrs. Used in brackish
I have a 2004 Volvo Penta 5.7 GXI , 280 Hrs. Used in brackish water , engine temp normal at idle to 2500 , 2500- 3500 engine temp approaches 200' , run the throttle up to 4000 and it cools down to nor… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
22,804 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
Am experiencing overheating while at speed with a Volvo Penta
Am experiencing overheating while at speed with a Volvo Penta 5.0 GL and SX stern drive unit. Cools down quickly to normal temperature when at idle. Raw water impeller is one year old and looks brand … read more
Noel Schembri
Noel Schembri
Marine Mechanic
Diploma
2,759 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
Certified Marine Technician
11,507 satisfied customers
i have an1997 prostar 205. I have aproblem with the water temp
i have an1997 prostar 205. I have aproblem with the water temp going up I have checked the impeller and the transmission cooler scren both are clear. I ran my boat today at low speed for a few minutes… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,507 satisfied customers
Hi, It seems the freshwater coolant circle of one of the two
1980 Mercruiser 470 freshwater coolant cycle clogged. I bought the Sea Ray 260 a while ago and started today for the first time the engines. The left engine runs fine after correcting the ignition cab… read more
gearheadII
gearheadII
Bachelor's Degree
138 satisfied customers
I have a 5.7 fuel injected I believe about 270 HP factory installed
I have a 5.7 fuel injected I believe about 270 HP factory installed original in a 2000 WA250 Sportcraft engine is running about 190-200 degrees usually stays about 170 this has been a gradual increase… read more
Mechman45
Mechman45
Vocational, Technical or Trade School
152 satisfied customers
I have a 5.7 GM crate motor in my 23ft 1985 sea ray. The motor
I have a 5.7 GM crate motor in my 23ft 1985 sea ray. The motor has approximately 50 hours. I had trouble with the risers becoming very hot. I changed the risers and manifolds, and also the impeller. I… read more
Captain Dave
Captain Dave
Charter Captain & I.S. Director
Master's Degree
2,808 satisfied customers
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