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I've got an 02' 5.7 mercruiser mpi. I'm hydro locking my
I've got an 02' 5.7 mercruiser mpi. I'm hydro locking my motor and getting water in all of my cylinders. I replaced the manifolds and risers but it's still doing it. I pulled the heads and I don't see… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
22,804 satisfied customers
Just replaced cylinder heads on 5.7 mercruiser (chev 350)
Just replaced cylinder heads on 5.7 mercruiser (chev 350) … read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
22,804 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
2004 Mercruiser 5.0 MPI V8 Bravo 3 is overheating. History:
2004 Mercruiser 5.0 MPI V8 Bravo 3 is overheating. History: It was a salt water boat that was drystacked in SC. Boat is a 2004 Sea Ray Sundeck 260. Engine serial number 668946 it has dry joints and a … read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
22,804 satisfied customers
How do you determine if manifolds need to be replaced and
How do you determine if manifolds need to be replaced and what is the estimated cost on a 2006 Sea Ray 245 Sundancer… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,409 satisfied customers
I had hydro lock on a mercruiser 7.4L v8. Boat has done 35hrs in 14 years. It has been tr
I had hydro lock on a mercruiser 7.4L v8. Boat has done 35hrs in 14 years. It has been trailered and under cover most of that time and looks brand new. I was reversing the boat at the time and then I … read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
22,804 satisfied customers
do you think the riser went bad then headgsket damage was secondary?
do you think the riser went bad then headgsket damage was secondary? the manifolds and riser have slight surface rust if i spray with pb blaster it would probably be gone?… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,409 satisfied customers
I have a mercruiser 3.0 liter 1992 motor in my Bayliner. The
I have a mercruiser 3.0 liter 1992 motor in my Bayliner. The motor has 400 hours on it and is used 75% in salt water. After every use I flush the motor with fresh water and a product called salt away.… read more
orcamarine
orcamarine
Proprietor
Vocational, Technical or Trade Scho
7 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 1995 sunbird with volvo penta 5.0 ford motor. my wife
I have a 1995 sunbird with volvo penta 5.0 ford motor. my wife ran it after the belt to water pump broke and it may have overheated. I thought the spark plugs were fouled so as I was replacing them wh… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,409 satisfied customers
My 1988 OMC 5.7 Cobra hydrolocked. This occured after I had
My 1988 OMC 5.7 Cobra hydrolocked. This occured after I had run the engine for a few hours then had the boat tied to the dock. We tied up came back a couple hours later and it hydrolocked. What would … read more
James
James
Marine Mechanic
Vocational, Technical or Trade Scho
4,111 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
11,409 satisfied customers
Mercruiser 5.0 MPI, engine overheated due to impellor failure,
Mercruiser 5.0 MPI, engine overheated due to impellor failure, however when trying to start it was hydro locked. Am I likely to have bent conrods? Compression test looked ok, water though was in all 8… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,409 satisfied customers
What could cause water in #4 cylinder on Mercruiser 140/GM
What could cause water in #4 cylinder on Mercruiser 140/GM 3lt. Removed head and gasket lookks OK no cracks that I could see. Did not remove the manifold… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,409 satisfied customers
I have two Marine power (crusader) engines 2007 models. I was
I have two Marine power (crusader) engines 2007 models. I was changing the plugs and out of number 8 cly. on port side came some antifreeze, I checked the tank and had to add 24 ozs. of water. what co… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,409 satisfied customers
Mercruiser 350 260 hp, raw water cooled in salt water. Large
Mercruiser 350 260 hp, raw water cooled in salt water. Large amount of water in oil causeing foaming and overfull crankcase. Pulled heads, found lots of water in middle cyls port side and appears to b… read more
Jeremy R.
Jeremy R.
5,362 satisfied customers
what can cause water in my oil other than a blown head gasket
what can cause water in my oil other than a blown head gasket? I have a 5.7 liter with a mercruiser lower unit...… read more
gearheadII
gearheadII
Bachelor's Degree
138 satisfied customers
I have a 210 06 bayliner cuddy with the 5 liter v-8 with
I have a '210' '06' bayliner cuddy with the 5 liter v-8 with less than 70 hours and never been in the saltwater. I have been told my a couple of mechanics about installing fresh water cooling and they… read more
ROCKET
ROCKET
MASTER CERTIFIED TECH
Vocational, Technical or Trade Scho
426 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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