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I have a 2007 marine 4.3l mpi mercuiser this unit will not
Hello I have a 2007 marine 4.3l mpi mercuiser this unit will not idle. I have replaced the iac and the foam muffler. Confirmed no vacuums leaks. It runs great at higher rpm when I drop down to around … read more
Boat Doc
Boat Doc
Boat Enthusiast
245 satisfied customers
I have a mercruiser 5.0 mpi and it cranks but won't start, I
I have a mercruiser 5.0 mpi and it cranks but won't start, I believe the Alternator froze up and is now free, but unsure if it is putting out. The engine was running great before then when we last sta… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,264 satisfied customers
I HAVE A HOUSEBOAT, SUMERSET 2006, WITH 2 MERCRUISER 5.0
I HAVE A HOUSEBOAT, SUMERSET 2006, WITH 2 MERCRUISER 5.0 MPI, 265 HORSEPOWER ENGINES. THE STARBOARD ENGINE HAS RUN GREAT UNTIL ABOUT A WEEK AGO, AND I CAN'T KEEP IT RUNNING. WHEN I START IT YOU CAN KE… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,264 satisfied customers
I have a 2002 sea ray 200 with the 5.0 MPI serial #
I have a 2002 sea ray 200 with the 5.0 MPI serial # ***** I was running back to dock this weekend operating from @ 3200 to 4200 rpms and was hearing 2 beeps per minute. All indications where normal, I… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,264 satisfied customers
Mercruiser 5.0 mpi. I'm getting a double beep as I cut the
Mercruiser 5.0 mpi. I'm getting a double beep as I cut the engine back to idle. Then the engine died and I couldn't restart. Put in a new battery and tried again. Wouldn't start unless I put the throt… read more
Noel Schembri
Noel Schembri
Marine mechanic
Diploma
1,736 satisfied customers
I have a 2005 Mercruiser 5.0 MPI. I was out yesterday for a
I have a 2005 Mercruiser 5.0 MPI. I was out yesterday for a cruise for an hour or so on plane. When I brought the throttle back to idle the engine stalled. I could only get it to run by advancing the … read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade Scho
17,310 satisfied customers
I have a 2009 Mercruiser 350 Mag MPI with Bravo 1 drive in
I have a 2009 Mercruiser 350 Mag MPI with Bravo 1 drive in a Stingray boat. The boat runs great at idle but as you increase throttle it begins to skip badly around 2,000 rpm. 2,500 is a slow plane for… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade Scho
17,310 satisfied customers
Hello, We have a MerCruiser 5.0 MPI 2004 4M9XM05.0GME that
Hello, We have a MerCruiser 5.0 MPI 2004 4M9XM05.0GME that ran fine this morning until we trolled at idle for 20 minutes. It stalled. Now it is difficult to start and won't run at idle. Need to shift … read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,264 satisfied customers
Have 2005 5.0 MPI Mercruiser that starts and runs fine at low
Have 2005 5.0 MPI Mercruiser that starts and runs fine at low RPM's going out of the channel. When I get out onto the bay and increase speed it runs well for about 5 minutes then bogs and hesitates. W… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,264 satisfied customers
I am in market for used bowrider in $ 25000 range what is
I am in market for used bowrider in $ 25000 range what is the difference in value , reliability and performance etc of the Mercruiser 5.0 TKS 220 HP vs 5.0 MPI 260 HP should I only pursue the later ? … read more
Malta Tech
Malta Tech
Marine Tech
High School or GED
287 satisfied customers
TAN, 1999 Mercruiser v8 5.0 EFI timing procedure needed. What
TAN, 1999 Mercruiser v8 5.0 EFI timing procedure needed. What is the correct timing procedure for this engine? Thanks… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,264 satisfied customers
I have a mercruiser 5.0 mpi and had to install a long block
I have a mercruiser 5.0 mpi and had to install a long block due to a cracked block. Everything bolted right back up and the engine runs smoothly. However it is sluggish coming out of the hole and I on… read more
Jeremy R.
Jeremy R.
5,362 satisfied customers
I have an 87 OMC 5.7 L chevy small block w/a Rochester Quadrajet
I have an 87 OMC 5.7 L chevy small block w/a Rochester Quadrajet carb. I am having issues with the engine stalling out at full throttle. There is fresh fuel in the the tank and the spin on fuel filter… read more
Captain Dave
Captain Dave
Marine Mechanic
Master's Degree
2,672 satisfied customers
I have a boat with twin 300 Mercruiser Horizon MPIs . The
I have a boat with twin 300 Mercruiser Horizon MPI's . The throttles are never even between the two engines. The port motor always requires more throttle to achieve equal rpms. I verified that the thr… read more
ROCKET
ROCKET
MASTER CERTIFIED TECH
Vocational, Technical or Trade Scho
426 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 considering a boat and I have a choice between motors
I am considering a boat and I have a choice between motors of a Mercruiser 4.3 MPI fuel injected V6 220 horse and a Volvo GL/SX 5.0 220 HP V8. Can you help me decide objectively?… read more
Infiniti Nissan Specialist
Infiniti Nissan Specialist
Master Technician
Vocational, Technical or Trade Scho
915 satisfied customers
good morning. I have a mercruiser 5.0 mpi 2007 and it runs
good morning. I have a mercruiser 5.0 mpi 2007 and it runs great from idle to about 30mph. When I go full throttle I reach a speed of about 48mph and then the engine begins to hesitate and then I loos… read more
Captain Dave
Captain Dave
Marine Mechanic
Master's Degree
2,672 satisfied customers
i have a 275 sea ray (260da) powered by a 5.0 l 260 hp mpi
i have a 275 sea ray = (260da) powered by a 5.0 l 260 hp mpi on a b3 leg ,fuel consumption 55 lt- 60 lt an hour 4000 rpm with a boat speed of 25 kn Q. Is this a standard consumption rate or do i have … read more
Dominick
Dominick
Marine Mechanic
Vocational, Technical or Trade Scho
1,009 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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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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