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The sea core hand pump failed to pressurize the system. It
The sea core hand pump failed to pressurize the system. It dripped from the blue plug along time then finally stopped. Did it fully drain? Is there a place I can add some anti freeze?… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade Scho
17,310 satisfied customers
I have a 2004 Bayliner with Merc 350 MAG MPI and Bravo III
I have a 2004 Bayliner with Merc 350 MAG MPI and Bravo III outdrive. I just replaced the swp impeller and accidentally pulled off the two hoses for the single point drain system that attach to the SWP… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade Scho
17,310 satisfied customers
My 350 MPI Mercruiser SN = 2A038022 Drained water using
My 350 MPI Mercruiser SN = 2A038022 Drained water using the single point handle 6 weeks ago right after running engine on lake and towed it home while draining. Left drain open for five weeks. Made up… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,264 satisfied customers
hey just winterize my boat on a 2006 350 mercruiser, all i
hey just winterize my boat on a 2006 350 mercruiser, all i saw was a drain plug on top and the bottom, and I could not find a 3rd? I went ahead and ran the ant freeze there the boat. did I miss a plug… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,264 satisfied customers
I just purchased a 2006 crownline 240 ex with a mercruiser
I just purchased a 2006 crownline 240 ex with a mercruiser 5.0 MPI bravo III I purchased it in Houston and drove it back to Oklahoma. I need to winterized it for the hard freezes we have here. I am pl… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade Scho
17,310 satisfied customers
Just bought a 2006 240 ex crownline with 5.7 liter 350 MPI.
Just bought a 2006 240 ex crownline with 5.7 liter 350 MPI. I am in the process of winterizing the engine. It appears to be a single point drain with a blue plug at the bottom and a blue plug in Therm… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,264 satisfied customers
2007 6.2 Mercruiser MPI with salt water pump. Had overheat
2007 6.2 Mercruiser MPI with salt water pump. Had overheat issue and changed the pump impeller and backflushed system to remove any debris. Impeller was destroyed and in many pieces. After repair I ho… read more
Abiorca
Abiorca
Proprietor
Vocational, Technical or Trade Scho
1,768 satisfied customers
hi, we purchased a 97 sanger boat last winter. it has over
hi, we purchased a 97 sanger boat last winter. it has over 800 hours on a 350 mag carbureted. the guy did a quick winterize, which i think he just removed the drain plugs because i have 3 or 4 blue ca… read more
James
James
Certified Marine Mechanic
Vocational, Technical or Trade Scho
4,094 satisfied customers
I have a 350 mag mpi, the Housing, water distributor has a
I have a 350 mag mpi, the Housing, water distributor has a crack where the drain plug goes. I'm looking up the part# XXXXX but mine doesn't have the little nipple at the bottom of the housing. It does… read more
James
James
Certified Marine Mechanic
Vocational, Technical or Trade Scho
4,094 satisfied customers
I need to winterize my 2010 Mercruiser 4.3 MPI Stern Drive
I need to winterize my 2010 Mercruiser 4.3 MPI Stern Drive (Freshwater) for sub freezing temperatures. I've inspected the engine and find a Blue Twist Knob, an Upper Blue Thumb Screw by the Thermostat… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,264 satisfied customers
Where can I find a diagram showing the location of the plastic
Where can I find a diagram showing the location of the plastic drain plugs on my 2001 Mercruiser 350 mag MPI ? Thanks, Bret… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,264 satisfied customers
I have a 350 MAG / MPI. The fuel pump has 2 cooling hoses that
I have a 350 MAG / MPI. The fuel pump has 2 cooling hoses that attach to it. There are 2 plastic fittings that the hose connects to then is just pressed into the fuel pump and tightened by one single … read more
Jeremy R
Jeremy R
1,069 satisfied customers
I have a 450 Mercruiser I/O, Bravo 3. Boat is stored above
I have a 450 Mercruiser I/O, Bravo 3. Boat is stored above the water in my boat lift. This weekend the air temp is expected to be 25 F or so for 12 hours, then warm up to 40, then freeze again (20F) f… read more
John White
John White
Marine Mechanic
Vocational, Technical or Trade Scho
306 satisfied customers
I would like to flush and change the anti-freeze on the fresh
I would like to flush and change the anti-freeze on the fresh water cooling side of my Mercruiser 350 Magnum MPI engine. It is a model year 2004 with the dealer installed fresh water cooling package w… read more
Captain Dave
Captain Dave
Marine Mechanic
Master's Degree
2,672 satisfied customers
We have just bought a 1999 Bayliner 2452 powered with a Mercruiser
We have just bought a 1999 Bayliner 2452 powered with a Mercruiser 350 mag mpi digital ignition (model MCM350MAGMPI). I am winterizing and I am only able to find one drainplug (blue) at the side of th… read more
Dominick
Dominick
Marine Mechanic
Vocational, Technical or Trade Scho
1,009 satisfied customers
Hi I have a Crownline 220L with a Mercruiser 350 Magnum
Hi I have a Crownline 220L with a Mercruiser 350 Magnum MPi fitted to a Bravo 3 leg, when I open the single point drain system with the vessel afloat sea water poores in, the system has a check valve … read more
davesoutboard
davesoutboard
owner
Associate Degree
1,570 satisfied customers
Have a 2003 Sea Ray Sundancer 260 with Mercruiser 5.0L MPI
Have a 2003 Sea Ray Sundancer 260 with Mercruiser 5.0L MPI (260 hp) Bravo 3. Found a small geyser of water 12 inches high of hot seawater coming out of threaded nipple (with no cap) on top of engine b… read more
capt ron 1959
capt ron 1959
Owner/Marine Mechanic
Vocational, Technical or Trade Scho
348 satisfied customers
I want to flush the saltwater out of my 350 mag mpi engines.
I want to flush the saltwater out of my 350 mag mpi engines. They are V-drives with seawater cooling. I am about to install closed cooling but want to flush them first. There is a quick connect hose m… read more
Expert-Repair
Expert-Repair
Owner Kingsland Auto & Marine Services
Vocational, Technical or Trade Scho
11 satisfied customers
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Meet the Experts:

Dominick

Dominick

Marine Mechanic

1,009 satisfied customers

25 Years Experience as Mechanic, 20 Yrs Boat Yard Owner/Mechanic, Factory Certified

Ted G.

Ted G.

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704 satisfied customers

40 years boating, Safe boating instruct., Offshore Race promoter, Failure Analysis, Expert Witness

John White

John White

Marine Mechanic

306 satisfied customers

11 years experience working on outboards, inboards, sterndrives & pwcs

Jason

Jason

Marine Mechanic

17,310 satisfied customers

Degree in Marine Technology. Gas and diesel marine mechanic.

Tan

Tan

MerCruiser Certified Technician

11,264 satisfied customers

40 yrs. experience with complete engine repairs both inboard/outboard and MerCruiser Certified Technician.

Jeff G.

Jeff G.

Marine Mechanic

4,729 satisfied customers

42 years experience, Certified Master Technician, All Major Outboards, Sterndrives, Hi-Performance

Captain Dave

Captain Dave

Marine Mechanic

2,672 satisfied customers

USCG Licensed Captain, 20+ Years Boating, Fishing, Maintenance and Repair Experience

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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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