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2005 mercruiser 5.7 i/o stalled now it cranks but wont
2005 mercruiser 5.7 i/o stalled now it cranks but wont start. After it happened I had my soninlaw remove the spark arrestor and pour a little gas in the carb, put it back together and it started and r… read more
Ted G.
Ted G.
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Vocational, Technical or Trade Scho
704 satisfied customers
Merc 3.0, in neutral it run fine can get max rpm, iin gear
Merc 3.0, in neutral it run fine can get max rpm, iin gear only get 1/2 trottle then bogs dwn till i back off full trottle, start to lose power at 2800rpm, … read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade Scho
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I have a carburated Mercruiser 5.7l with Alphi I outdrive.
I have a carburated Mercruiser 5.7l with Alphi I outdrive. It was running well and I let it sit for about a month and a half in the marina. I took it ouut yesterday and it started easily, it ran nicel… read more
Jason
Jason
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Vocational, Technical or Trade Scho
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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
Marine Mechanic
Vocational, Technical or Trade Scho
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I have a 1997 Mercruiser 5.7, throttle body fuel injection. When
I have a 1997 Mercruiser 5.7, throttle body fuel injection. When you accelearte full throttle from a an idle it back fires once at about 3000-3500rpm and then accelerates normally. The tach reads corr… read more
James
James
Certified Marine Mechanic
Vocational, Technical or Trade Scho
4,094 satisfied customers
I have a 1987 Alpha 1 Mercruiser 3.7liter I/O which I have
I have a 1987 Alpha 1 Mercruiser 3.7liter I/O which I have owned since purchased new. Have had very little problems with the engine. Replaced the outdrive about two years ago due to fishing line destr… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
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I just bought a 1990 starcraft with a 5.7 350 omc in it. I
I just bought a 1990 starcraft with a 5.7 350 omc in it. I put new plugs, points and a carb kit in it and the boat is still real slow to get up on plain. If you give it full throttle when trying to ta… read more
James
James
Certified Marine Mechanic
Vocational, Technical or Trade Scho
4,094 satisfied customers
I have a 19ft Bayliner w/4.3l Mercruiser. Engine either stalls
I have a 19ft Bayliner w/4.3l Mercruiser. Engine either stalls or bogs for a lengthy moment when the trottle is pushed quickly from stop ( in forward gear ) to full speed ( pulling a wakeboarder )… read more
James
James
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Vocational, Technical or Trade Scho
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My 91 Mercruiser V6 starts fine but will not rev above 1000
My 91 Mercruiser V6 starts fine but will not rev above 1000 rpm. I have replaced all vital electronic componets including the the module. The fuel is fine & the carb is fine, it just stalls and back f… read more
Jeremy R.
Jeremy R.
5,362 satisfied customers
1999 Volvo Penta 5.7 GSX PWTR. Problem is lost power in gear.
1999 Volvo Penta 5.7 GSX PWTR. Problem is lost power in gear. Idles smoothly, and throttles up nicely in neutral. In gear will not go to 2000rpm or 15mph. This happened sporadicly. Started the day fin… read more
Jeremy R.
Jeremy R.
5,362 satisfied customers
i have a merc 2005 9.9 4 stroke, it starts ok and runs fine
i have a merc 2005 9.9 4 stroke, it starts ok and runs fine at slow speeds. when i throttle up to high speed it bogs down. the gas is only a week old and it is 92 octane. is there something i can get … read more
Jeremy R.
Jeremy R.
5,362 satisfied customers
I have a 5.7 L Mercruiser that has been well maintained. Coming
I have a 5.7 L Mercruiser that has been well maintained. Coming back from a 5 mile trip out in the Gulf the motor started to serge or bog down. It has 1/4 tank of gas and the tank has been cleaned out… read more
James
James
Certified Marine Mechanic
Vocational, Technical or Trade Scho
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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
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Had a remanufactured long block 5.7 Mercruser 350 MAG with
Had a remanufactured long block 5.7 Mercruser 350 MAG with 270 HP installed in a 23 Bowrider (replacing a 7.4 Mercruiser engine). When we test drove it made a funny smell and the mechanic looked at it… read more
Master Tech
Master Tech
Service Manager/Technician
Vocational, Technical or Trade Scho
1,167 satisfied customers
I have a 2003 Centurion with a 5.7 Ltr Mercruiser with only
I have a 2003 Centurion with a 5.7 Ltr Mercruiser with only 28 hours on it.I replaced the thermostat today and ran it in my driveway for 20 minutes but the temp never registered above 120. Also the bo… read more
capt ron 1959
capt ron 1959
Owner/Marine Mechanic
Vocational, Technical or Trade Scho
348 satisfied customers
My 1996 Mercruiser (5.7 ltr) is having difficulty starting-
My 1996 Mercruiser (5.7 ltr) is having difficulty starting- ignition system (starter, coil, distributer cap, rotor and plugs are all brand new. When boat does start it runs great under med- full throt… read more
Joe
Joe
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Vocational, Technical or Trade Scho
1,382 satisfied customers
Mercruiser 5.7 FI runs great all day. At end of day motor losses
Mercruiser 5.7 FI runs great all day. At end of day motor losses power pings, clanks, and backfires then dies and wont re start. If i wait 10 to 15 minutes it starts & runs great again for hours.???? … read more
ROCKET
ROCKET
MASTER CERTIFIED TECH
Vocational, Technical or Trade Scho
426 satisfied customers
took my boat out 2 weeks ago, it ran great all day....until
took my boat out 2 weeks ago, it ran great all day....until I thought I ran out of gas pulling into my slip but the gauge showed I was just getting to the reserve. Now the motor fires, Idles for a min… read more
ROCKET
ROCKET
MASTER CERTIFIED TECH
Vocational, Technical or Trade Scho
426 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.

Rigger, Diagnostician

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

18,743 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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