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I have searay sundancer with mercruiser 5.7 efi bravo 2 runs
I have searay sundancer with mercruiser 5.7 efi bravo 2 runs perfect in and out of gear in the driveway but when I put it in gear in the water runs about 10 seconds and die can start it again and rev … read more
Ted G.
Ted G.
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Vocational, Technical or Trade Scho
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VOLVO PENTA 2005 5.0OGXi-E ENGINE IDLE SURGING After ideling
VOLVO PENTA 2005 5.0OGXi-E ENGINE IDLE SURGING After ideling about 30 min. at 800 rpms engine start to run rough slowing to around 300 rpms. then surges to 2000 rpms under power load,If takin out of g… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
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I have a 5.0 volve penta GXI EFI with throttle body. It
I have a 5.0 volve penta GXI EFI with throttle body. It starts great and ramps up slow and does not fall on its face. If you throttle up fast it falls on its face right away. Fuel pressure stays right… read more
Charles
Charles
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I have a 222cobalt which had a 350 magnum in it it needed
I have a 222cobalt which had a 350 magnum in it it needed replacing so ordered a complete new engine from merc it now does not perform like original it does about 40 now where it use to over 50mph it … read more
Jason
Jason
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Vocational, Technical or Trade School
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I have a 2007 40 hp efi mercury on a 13' whaler. I am able
I have a 2007 40 hp efi mercury on a 13' whaler. I am able to get the boat to full power with a slow engaging of the throttle. However, I am unable to " gun it" from idle. It will seem to stall. I get… read more
Jason
Jason
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Vocational, Technical or Trade School
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I have twin 1988 5.7 270hp Crusader Engines. Just recently
I have twin 1988 5.7 270hp Crusader Engines. Just recently the Starboard engine will lose power and seem to miss,lose power and bogdown after running 30 minutes under load. It runs fine in Neutral or … read more
Jason
Jason
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I have a 1996 Carver 355 aft cabin with twin 454 crusader XL
I have a 1996 Carver 355 aft cabin with twin 454 crusader XL engines. My starboard engine runs fine after runing it for about an hour. When I sart it back up the engine won't run over 2500 RPM's and p… read more
briggs archer
briggs archer
master marine mechanic
Associate Degree
374 satisfied customers
i have a 2003 searay sundancer 300 with the twin 5.0 EFI engines.
i have a 2003 searay sundancer 300 with the twin 5.0 EFI engines. Yesterday on our way back from a 2hr boat ride we heard a engine alarm and the starboard engine shut down soon after. The engine will … read more
Rick Gay
Rick Gay
High School or GED
106 satisfied customers
I am having a weird problem with my twin 4.3 EFI mercs, The
I am having a weird problem with my twin 4.3 EFI mercs, The port motor is running at 1000 more revs than the starboard. I have checked the tachos, both are reading correctly, checked cables and both h… read more
orcamarine
orcamarine
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I replaced a 5.0 efi throttlebody engine with a 5.7 300-325hp
I replaced a 5.0 efi throttlebody engine with a 5.7 300-325hp engine and i want to use the throttlebody efi system. Will the new engine work with the tb system and a 454 brain?… read more
Jason
Jason
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Vocational, Technical or Trade School
20,336 satisfied customers
97 albermarle twin inboard 5.8 efi volvo penta. port side
97 albermarle twin inboard 5.8 efi volvo penta. port side engine has a real basic idle for thirty seconds and then shuts down. unable to give it any throttle because it stalls. restarts and will idle … read more
Jason
Jason
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installed new 5.7 gm vortec efi long block. The sensors,
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Jeremy R.
Jeremy R.
5,362 satisfied customers
I have a 1997 chaparral 29 with twin 5.7 efi and bravo 1.It
I have a 1997 chaparral 29 with twin 5.7 efi and bravo 1.It will bogg at wot and sometimes pop back through thottle body.It has new fuel pump and filters.Spraying carb clean to enrich mixture did not … read more
Jeremy R.
Jeremy R.
5,362 satisfied customers
I own a 1999 Chaparral 2835 w/ twin 350 MAG EFI engines. They
I own a 1999 Chaparral 2835 w/ twin 350 MAG EFI engines. They have 690 hours. After starting ok, and running ok, then after sitting a couple hours, one or the other engine won't start. It sounds flood… read more
Jeremy R.
Jeremy R.
5,362 satisfied customers
i just bought a 1986 sea ray 300 with twin 260 mercruiser
i just bought a 1986 sea ray 300 with twin 260 mercruiser 5.7 engines . everything was running and the engines started , untill i wanted to do a tune up now 1 engine will not start. i put new plugs, n… read more
Tan
Tan
MerCruiser Certified Technician
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11,406 satisfied customers
boat will start and run fine. shut it off after it is warmed
boat will start and run fine. shut it off after it is warmed up and it will resart, then begin to run erattically, going to high and low rpm and the alarm will sound. the boat shuts off and will not r… read more
Joe
Joe
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Vocational, Technical or Trade Scho
1,392 satisfied customers
I have a 1997 24 foot Chapparell with a 5.7 EFI mercruiser
I have a 1997 24 foot Chapparell with a 5.7 EFI mercruiser that wants to stick on high idle alot and the only way to fix it is to shut it off and restart it,also it seems to be running rich,I get lots… read more
Dr. Joe
Dr. Joe
Bachelor's Degree
198 satisfied customers
Just bought a brand new volvo penta 5.0 engine. Have ...
Just bought a brand new GM Long block 5.7 engine for a Volvo Penta duro prop with throttle body injection. Have changed numerous sensors, both fuel pumps, plug wires, etc. starts up and idles fine. wh… read more
Larry B.
Larry B.
Marine Service Tech
High School or GED
574 satisfied customers
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Meet the Experts:

Ted G.

Ted G.

Rigger, Diagnostician

1,488 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

20,336 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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