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I have a mercruiser 5.0 mai. Mpi. I have had 2 valves psh up
I have had 2 valves psh up into the head on 2 separate occasions the first time was 3 weeks ago on the odd side #5… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,483 satisfied customers
I hav 2003e. I have a searay 4.3 tbi 2003 put the scanner on
I have a searay 4.3 tbi 2003 put the scanner on it the timing is jumping all over the place … read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade Scho
17,310 satisfied customers
I have a 2001 Mercruiser 5.0 efi. The engine was just
Good morning. I have a 2001 Mercruiser 5.0 efi. The engine was just rebuilt and is still out of the boat and on a test bench. The engine fires right up but immediately stalls. It seems that its still … read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade Scho
17,310 satisfied customers
I have a 5.0 EFI mercruiser, 22 foot cuddy, W.O.T. only producing
I have a 5.0 EFI mercruiser, 22 foot cuddy, W.O.T. only producing 30 mph. New engine in 2014.… read more
Jason
Jason
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Vocational, Technical or Trade Scho
17,310 satisfied customers
I have a technical question about the configuration of a Mercruiser
I have a technical question about the configuration of a Mercruiser 5.0 L MPI Serial No. OM 627870. The case: My boat (Bayliner) was originally utilized with an OMC engine and outdrive, but the OMC en… read more
Noel
Noel
Marine mechanic
Diploma
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Have 1988 hallett w/454 4 bolt ,had to replace engine due to
have 1988 hallett w/454 4 bolt ,had to replace engine due to freeze.replaced engine w what was sold as marine engineit came to me w/a 2bolt main .any ideas on power out put,or how can increase power o… read more
Abiorca
Abiorca
Proprietor
Vocational, Technical or Trade Scho
1,768 satisfied customers
I have a 7.4 2000 mercruiser I am replaciing injectors . Ineed
I have a 7.4 2000 mercruiser I am replaciing injectors . Ineed to know if r849896 is a acceptable substition for the r802632t all so can the be mixed as in 3 of one and 5 of the other. I need the flow… read more
Abiorca
Abiorca
Proprietor
Vocational, Technical or Trade Scho
1,768 satisfied customers
did mercury ever build a 2.o litre efi my cowling says 2.o
did mercury ever build a 2.o litre efi my cowling says 2.o litre 98 150 just had new power head put on dont run right over loading guy at marine said he never seen 2.0 litre efi thinks computer is fee… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade Scho
17,310 satisfied customers
I have a 5 litre inboard with 109 hours on it. When you put
I have a 5 litre inboard with 109 hours on it. When you put it in nuetral the engine stalls. This hapens when the engine is warm not when it is cold. It is than hard to restart. I took in to a dealer … read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade Scho
17,310 satisfied customers
Hello, I have a 1998 Chaparral 19.6 with a 350 mercruiser.
Hello, I have a 1998 Chaparral 19'.6 with a 350 mercruiser. It has started backfiring or sputering after it wams up. The spark plugs, plug wires, ignition module, cap and rotor, fuel filter, coil, hav… read more
Jeremy R
Jeremy R
1,069 satisfied customers
Hi I have a 4.3 ,and 5.0 litre mercruiser-both are EFI-what
Hi I have a 4.3 ,and 5.0 litre mercruiser-both are EFI-what is the timing for these engines and is there a special timing method required… read more
Jeremy R
Jeremy R
1,069 satisfied customers
Im trying to track down a control module for a 5.7 litre
I'm trying to track down a 'control module' for a 5.7 litre efi, the serial number is XXXXX if anyone can help me with that it would be great.… read more
Jeremy R
Jeremy R
1,069 satisfied customers
Is there a current link for Service Bulletins from 2003 on
Is there a current link for Service Bulletins from 2003 on? I'm interested in one pertaining to the 500 HP EFI Bravo engine. I know the prior build the 496 MAG HO had a problem with the push rods. I t… read more
mercmastertech
mercmastertech
Service Manager, Master technician
Technical School
249 satisfied customers
I have a mercruiser 2005 5.0L Thunderbolt V ignition 2 bbl.
I have a mercruiser 2005 5.0L Thunderbolt V ignition 2 bbl. carb.alpha drive, the Seloc book says there is a knock sensor module and knock sensor ? I see none ! did the manufacturer forget it ? How el… read more
Jack
Jack
Marine Technician
Vocational, Technical or Trade Scho
54 satisfied customers
I am looking for a manual for a 496SC mercruiser. This is
I am looking for a manual for a 496SC mercruiser. This is the super charged edition of the 496 mag I think. I can't find any information on this engine. But it is definately a factory supercharger and… read more
Dominick
Dominick
Marine Mechanic
Vocational, Technical or Trade Scho
1,009 satisfied customers
I have a 96 wellcraft that ran o.k in driveway, but only 2
I have a 96 wellcraft that ran o.k in driveway, but only 2 mins in the water. It turns over but doesn't start. I tried quick start & gas in the carb. Also tried bypassing the lanthen. I could not see … read more
Dominick
Dominick
Marine Mechanic
Vocational, Technical or Trade Scho
1,009 satisfied customers
Mercruiser 5.0 EFI, alpha I outdrive (190 hrs.). Twice ...
Mercruiser 5.0 EFI, alpha I outdrive (190 hrs.). Twice now, weeks apart, boats starts and idles as if out of fuel and dies. Immediatly will start back up and will surge up and down and die. Can occasi… read more
Captain Dave
Captain Dave
Marine Mechanic
Master's Degree
2,672 satisfied customers
i have a mercury mercruiser 5.0 2003 engine and the fuel ...
i have a mercury mercruiser 5.0 2003 engine and the fuel pump does not shut off when i turn the key off… read more
BC Boat Guy
BC Boat Guy
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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

11,483 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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