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2005 Mercruiser temp guage shows 40 degrees high. Checked
2005 Mercruiser temp guage shows 40 degrees high. Checked with heat gun guage goes to 200 and stays there. Temp guns says 165. Boat has been setting 5 years. Changed impeller and thhermostat … read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
22,962 satisfied customers
Alpha one gen 2 outdrive heating oil to overflow/ alarm
alpha one gen 2 outdrive heating oil to overflow/ alarm comes on. OK at 2000 rpm but will overheat at on plane/3000 rpm. the exhaust bellow is completely severed. could leaking/blow by exhaust at high… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
22,962 satisfied customers
Just took possession of a 2001 Four Winns 248 Vista and took
Hello, Just took possession of a 2001 Four Winns 248 Vista and took her on a maiden voyage today. Through no wake zones and coming onto plane with the engine trimmed down, temps fine. On plane, temps … read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
22,962 satisfied customers
My 1998 Wellcraft 180 V6 4.3L leaks when I raise the lower
My 1998 Wellcraft 180 V6 4.3L leaks when I raise the lower unit Stops mostly when it is put down to run… read more
Tan
Tan
MerCruiser Certified Technician
11,507 satisfied customers
I have a 2008 sea ray 240 sundancer, it has the 5.0 mpi engine.
i have a 2008 sea ray 240 sundancer, it has the 5.0 mpi engine. was out sunday and the water pressure senor was coming across the screen and beeping. what would cause this?… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
22,962 satisfied customers
2007 mercruiser 5.0 MPI, just replaced raw water impeller,
2007 mercruiser 5.0 MPI, just replaced raw water impeller, thermostat, oil, plugs, drive lube and engine runs smooth but using an IR gun thermometer I get 90F on top of riser, 180-185 on lower sides o… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
22,962 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
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
11,507 satisfied customers
I have a 2006 bayliner 175 br with a mercruiser 135hp 3.0 inline
I have a 2006 bayliner 175 br with a mercruiser 135hp 3.0 inline 4 cylnder alpha one. At what temperature should the engine run? I took it out today and it was running at 175 degrees and then came int… read more
orcamarine
orcamarine
Proprietor
Vocational, Technical or Trade Scho
7 satisfied customers
I have a 1998 Merc Cruiser 5.7L 250hp alpha gen.2 drive. Engine
I have a 1998 Merc Cruiser 5.7L 250hp alpha gen.2 drive. Engine overheats at 3800rpm. Temperture drops to 160 at 3200rpm. I have changed themostat and impeller and still have overheating problem thank… read more
Whitecap36
Whitecap36
Service Manager/Technician
Vocational, Technical or Trade Scho
1,557 satisfied customers
5.7L 350, OF601827,stern drive Alpha/gen. The impeller,both
5.7L 350, OF601827,stern drive Alpha/gen. The impeller,both manifolds & risers,thermostat,water pump have been replaced(new) this month. The engine still heats til the alarm goes off as the temp rises… read more
Tan
Tan
MerCruiser Certified Technician
11,507 satisfied customers
Have a new to me boat with two 5L mercruiser engines alpha
Have a new to me boat with two 5L mercruiser engines alpha 1 drives. I am almost sure the engines are fuel injected. My right engine has been quiting while under load slow speed. I also notice that th… read more
Tan
Tan
MerCruiser Certified Technician
11,507 satisfied customers
Have a 1992 Bayliner Trophy with 3 liter and alpha leg. Raw
Have a 1992 Bayliner Trophy with 3 liter and alpha leg. Raw water used in salt water and motor is done. Was badly underpowered and am considering repowering with 4.3 (carbed or MPI ?) Boat plate indic… read more
K. Kergan
K. Kergan
Inboard/Outboard Mechanic
Vocational, Technical or Trade Scho
1,031 satisfied customers
I have a 1998 Sea Pro with a Chevy 350 inboard/outboard with
I have a 1998 Sea Pro with a Chevy 350 inboard/outboard with alpha drive. The engine temp is good at idle, but runs hot when under load, like trying to get on plane. When you slow back down, the temp … read more
Rick Gay
Rick Gay
High School or GED
106 satisfied customers
88 Mercruiser 5.7, w Alpha 1. Gets too warm, 200 degrees indicated.
88 Mercruiser 5.7, w Alpha 1. Gets too warm, 200 degrees indicated. Found perforated outdrive to transom hose, fixed it. Still over 180 degrees. Found ruined impeller and melted water tube, rebuilt st… read more
briggs archer
briggs archer
master marine mechanic
Associate Degree
402 satisfied customers
What should the water temperature (degrees) be at high speeds
What should the water temperature (degrees) be at high speeds for a 1993 Mercury 200 EFI. Bob Davenport… read more
Captain Dave
Captain Dave
Marine Mechanic
Master's Degree
2,672 satisfied customers
I have a Mercruiser 4.3 LX with an Alpha 1 Gen II drive. Gear
I have a Mercruiser 4.3 LX with an Alpha 1 Gen II drive. Gear oil is leaking into the bildge but is not coming from the gear lube monitor or hose that connects the minitor to the drive. I may have a b… read more
ROCKET
ROCKET
MASTER CERTIFIED TECH
Vocational, Technical or Trade Scho
426 satisfied customers
I have a 2001 4.3L V6 Mercruiser with an Alpha outdrive. The
I have a 2001 4.3L V6 Mercruiser with an Alpha outdrive. The stock one piece exhaust elbows rusted out and water got into the engine so I pulled the motor out and rebuilt it. The heads were taken in a… read more
Captain Dave
Captain Dave
Marine Mechanic
Master's Degree
2,672 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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