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I have boat with 2 engines: Boat model: Bayliner 325
Hi! I have boat with 2 engines:Boat model: Bayliner 325 Sunbridge Year of build: 2007Port engine Mercury Mercruiser 5.0 MPI comprerssion test: — 1: 180 — 2: 80 — 3: 170 — 4: 180 — 5: 200 — 6: 170 — 7:… read more
Ted G.
Ted G.
Rigger, Diagnostician
Vocational, Technical or Trade Scho
7,672 satisfied customers
Mercruiser 5.0 MPI allows waterback in cylinder after
Mercruiser 5.0 MPI allows waterback in cylinder after shutdown causing hydraulic lock!? … read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
20,078 satisfied customers
Poor water flow out the port side exhaust. I already
Poor water flow out the port side exhaust. I already replaced risers and checked water pump. All good. Shutter is missing on port side so the old shutter might be lodged in the exhaust. Not sure how t… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
20,078 satisfied customers
Have a 2005 325 Bayliner with twin 5.0 Mercruisers, both
Have a 2005 325 Bayliner with twin 5.0 Mercruisers , both motors have been running well but this weekend stopped for gas when I went to start port side little trouble starting. Took on a 40 minute rid… read more
Charles
Charles
Certified Mercury Tech
5,638 satisfied customers
Tan I have a 1996 sea ray br210 select. It has a 350 efi
Hi Tan I have a 1996 sea ray br210 select. It has a 350 efi mercrusier. Just recently had problems when the boat is in the water without the engine running for 30 to 40 minutes or more the engine hydr… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,409 satisfied customers
I just bought a used 88 mercruiser 140 it been sitting
Hello I just bought a used 88 mercruiser 140 it been sitting for 3 years engine looks great I started on hose and it ran good for 1/2 hour Took rocker cover off and noticed milky oil drained oil it wa… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,409 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
2005 5.0 MPI overheats. Risers are cool to touch, thermostat
2005 5.0 MPI overheats. Risers are cool to touch, thermostat is out , water temp 60, new impeller in raw water pump. Think block water jacket is filled with corrosion. Anyway to flush it out?… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
20,078 satisfied customers
Maybe you can, I hope. I have twin 350 Magnum Mercrusier engines
Maybe you can, I hope. I have twin 350 Magnum Mercrusier engines on my 2002 Rinker 342 and have water intrusion into my Starboard engine cylinders on the port side. Never overheated but hydrolocked la… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,409 satisfied customers
How common is it for a 1999 Bayliner Capri 2050 with a Mercruiser
How common is it for a 1999 Bayliner Capri 2050 with a Mercruiser 5L V8 engine to ingest water up through the exhaust if the shutters are faulty, when the boat is used for wakeboarding with standard m… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,409 satisfied customers
I need original parts numbers for marine exhaust manifolds,
I need original parts numbers for marine exhaust manifolds, 1.5 inch spacer and risers for a 1974 454cid 350hp bluewater mercruiser engine… read more
James
James
Certified Marine Mechanic
Vocational, Technical or Trade Scho
4,094 satisfied customers
Hi my Mercruiser 1999 5.7 liter engine hydro-locked. Water
Hi my Mercruiser 1999 5.7 liter engine hydro-locked. Water came out of middle two #4 and 6 cylinders on port side.I had an overheating issue earlier and worked better after flushing with fresh water. … read more
James
James
Certified Marine Mechanic
Vocational, Technical or Trade Scho
4,094 satisfied customers
i am new to boating. have a 1995 chaparral with mercruiser
i am new to boating. have a 1995 chaparral with mercruiser 5.7L engine. have had for 3 years. cranked up to take out this weekend for first time this summer. locked up. took spark plugs out. water in … read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,409 satisfied customers
I have a 1992 Sea Ray Sundancer with a 7.4L Mercruiser (got
I have a 1992 Sea Ray Sundancer with a 7.4L Mercruiser (got it 3 years ago) with fresh water cooling (heatexchanger). Since the time I bought the boat it has always needed to have a small amount of an… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,409 satisfied customers
Hello, I have two 2001 6.2 mpi mercruiser motors that yesterday
Hello, I have two 2001 6.2 mpi mercruiser motors that yesterday I changed all four risers. When I started them up I checked for water flow out the exhaust and see none. I bumped them up to 1500 rpm an… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,409 satisfied customers
I found an old water flapper shutter in my exhaust port. Where
I found an old water flapper shutter in my exhaust port. Where are the water shutters located on a 1995 Mercruiser (350 CI pre-alpha, 5.0 L), and how are they replaced? Do you have a parts diagram, an… read more
shane j forrest
shane j forrest
Vocational, Technical or Trade Scho
270 satisfied customers
How do you determine what gaskets to use on a 5.0 MPI Merc.
How do you determine what riser gaskets to use on a 5.0 MPI Merc. serial #OM624908 with a standard water cooling system dry-joint with spacers between exhaust manifold, spacer, and riser? I've been to… read more
mercmastertech
mercmastertech
Service Manager, Master technician
Technical School
249 satisfied customers
I found an old water shutter in my exhaust port. Where are
I found an old water shutter in my exhaust port. Where are the water shutters located on a 1982 Mercruiser 260 (350 CI pre-alpha), and how are they replaced? Do you have a parts diagram, and do I need… read more
Dominick
Dominick
Marine Mechanic
Vocational, Technical or Trade Scho
1,009 satisfied customers
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Meet the Experts:

Ted G.

Ted G.

Rigger, Diagnostician

7,672 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

20,078 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

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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