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Ran my Lund with 2002 4 stroke last run for the year, got a
Ran my Lund with 2002 Johnson 4 stroke last run for the year, got a check engine light and alarm. Shut down and restarted, no light but the motor will not throttle up. Just surges between 3000 and 400… read more
DAVID BALLARD
DAVID BALLARD
OWNER
Vocational, Technical or Trade School
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2003 mercruiser 5.0 mpi. I have an engine that misfires and
2003 mercruiser 5.0 mpi. I have an engine that misfires and occasionally backfires. At 3000 rpm it will suddenly drop to 2000 rpm and then right back to 3000 rpm. Booster fuel pump and filter have bee… read more
Jason
Jason
Marine Mechanic
20,024 satisfied customers
2001 5.0 mercruiser water pump sheared off motor, temp only
2001 5.0 mercruiser water pump sheared off motor, temp only went to 175 but motor would only run low rpm, is that guardian mode or did I hurt the motor … read more
Jason
Jason
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20,024 satisfied customers
Have 2004 280 Sundancer twin Mercruiser 4.3's with Alpha 1
Have 2004 280 Sundancer twin Mercruiser 4.3's with Alpha 1 Gen 2 Outdrives. Everything worked last year but on de winterization the smartcraft gauges won't work for either engine. Engines run fine. No… read more
Charles
Charles
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Engine is a 2004 Yamaha 150 TXRC, 2-cycle (425 hrs). Problem
Hello. Engine is a 2004 Yamaha 150 TXRC, 2-cycle (425 hrs). Problem started with dashboard digital readouts: First noticed boat speed over water was way higher than GPS-derived speed. Then tach failed… read more
Noel Schembri
Noel Schembri
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Diploma
1,804 satisfied customers
I have 496 mercruiser cloesd cooling system, brought it out
I have 496 mercruiser cloesd cooling system, brought it out of storage from winter and ran it at idle for 5 minutes, then a solid alarm came on, all gauges were fine, couple minutes later it started t… read more
Whitecap36
Whitecap36
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Vocational, Technical or Trade Scho
1,556 satisfied customers
I have twin mercruiser 5.0 2002 engines. Gimbles/ shift cables
I have twin mercruiser 5.0 2002 engines. Gimbles/ shift cables were just replaced, engines out- prior had no problems with alarms or stalls. Now back in water and I have an intermittent 2 minute alarm… read more
Jason
Jason
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I have two efi 454 mercruisers in my boat. My starboard engine
I have two efi 454 mercruisers in my boat. My starboard engine has had numerous problems over the last 6 months. Exhust manifold leaked water in. A lot of work has been done, but now the mechanic is s… read more
orcamarine
orcamarine
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Vocational, Technical or Trade Scho
7 satisfied customers
I have a 220 Sun something, walk thru windshield, 5.0 Mercruiser
I have a 220 Sun something, walk thru windshield, 5.0 Mercruiser IO/OB. I'm having trouble keeping it running-it dies on idle-it will run in neutral at about 1800 rpm. The trouble beepers intermitant … read more
Jason
Jason
Marine Mechanic
20,024 satisfied customers
i have a 2002 Sea Ray 230 with 5.0/Bravo3 and 89 total hours
i have a 2002 Sea Ray 230 with 5.0/Bravo3 and 89 total hours that made a very noticeable metallic 'ping' noise at about 4800 rpm operation on smooth water. this was a single noise like a high-tensile … read more
Tan
Tan
MerCruiser Certified Technician
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11,406 satisfied customers
I have a 5.0 LMPI 260HP Alpha Mercruiser engine in a 210 LX
I have a 5.0 LMPI 260HP Alpha Mercruiser engine in a 210 LX Crownline 2004. My problem started the last two times I used the boat. First it stalled a couple times after starting but that disappeared a… read more
James
James
Certified Marine Mechanic
Vocational, Technical or Trade Scho
4,094 satisfied customers
I have a 1998 Searay 290DA Sundancer with twin - 5.0 EFI Mercruisers
I have a 1998 Searay 290DA Sundancer with twin - 5.0 EFI Mercruisers and Alpha one drives The boat has 310 hours on it and had been used very little before I purchased it in 2008 For the past several … read more
Ted G.
Ted G.
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Vocational, Technical or Trade Scho
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I just bought a 32 planing hull cruiser that needs to be repowered,
I just bought a 32' planing hull cruiser that needs to be repowered, probably with twin 5.0 mercruiser EFI and Bravo II. Displacement wet is about 14,000 lbs. What stern drive gear ratio would you rec… read more
Jason
Jason
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20,024 satisfied customers
I have a 5.0 Mercruiser 200 hp inboard. At any cruising speed,
I have a 5.0 Mercruiser 200 hp inboard. At any cruising speed, say 3000 rpm's, it will cut back about 4-500 rpms and then resume to 3000. These are peroidic cut backs about every 3 to 4 minutes. What … read more
Jeremy R.
Jeremy R.
5,362 satisfied customers
Hello, I have a 2003 Mercury Marine 5.0 MPI 260HP with Alpha
Hello, I have a 2003 Mercury Marine 5.0 MPI 260HP with Alpha 1 drive. The Smartcraft alarm is giving 2 beeps every minute or so. The engine is also running very rough. The 2 beeps begin as soon as you… read more
James
James
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Vocational, Technical or Trade Scho
4,094 satisfied customers
we have a 2004 bennington pontoon with a mercruiser 115 hp
we have a 2004 bennington pontoon with a mercruiser 115 hp efi outboard. today we notcied the tach was reading 6000 rpm (i really don't think the motor was reving @ 6000) and it ran more like a speed … read more
Jeremy R.
Jeremy R.
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I have a Mercruiser 5.0 I/O in a Hurricane 20.5 deck boat that
I have a Mercruiser 5.0 I/O in a Hurricane 20.5 deck boat that is 10 years old, but much lower than average hours. I filled up the gas tank last fall prior to storage and had the boat winterized at a … read more
Dr. Joe
Dr. Joe
Bachelor's Degree
198 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
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Meet the Experts:

Ted G.

Ted G.

Rigger, Diagnostician

1,242 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

20,024 satisfied customers

Degree in Marine Technology. Gas and diesel marine mechanic.

Tan

Tan

MerCruiser Certified Technician

11,406 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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