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1999 Mercruiser 5.7 EFI with throttle body. Engine has 380
1999 Mercruiser 5.7 EFI with throttle body. Engine has 380 hours and Serial # is OL089049. Boat engine died after 4 days at the lake. Ran great in the morning when back to camp and when went to go out… read more
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I have a 1997 Searay 21ft. with a 5.7 mercruiser efi with an
I have a 1997 Searay 21ft. with a 5.7 mercruiser efi with an alpha 1 sterndrive. The block had a crack so we replaced the block with a new short block from the local speed shop in dallas and reinstall… read more
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Vocational, Technical or Trade Scho
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My 2001 yamaha 115 2 stroke was running great at the end of
my 2001 yamaha 115 2 stroke was running great at the end of last season, started up this spring ang ran great at idle. started out onto lake and upon giving gas rpm's increased and then motor started … read more
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At full throttle boat will only make 3500 rpm. Engine sounds
At full throttle boat will only make 3500 rpm. Engine sounds fine. Put it full throttle in neutral same thing. Took her out one week ago no problem. Engine is mercruiser I/O 5.0 260 hp… read more
Tan
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I have two 225 HP 1997 Mercury outboards, carbs. One will
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I have a 2005 Four Winns w/a 5.7 volvo penta engine. My boat
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my 1997 5.7 mercruiser is poping thru the throttle body when
my 1997 5.7 mercruiser is poping thru the throttle body when i try to go on plane.thats about 3000 rpm.at low rpm it runs fine and at idle its nice and smooth any ideas?i tried a new fuel filter no di… read more
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ihave a 2007 tahoe boat with a 4.3L 220 HP I/O Mercruiser engine.
ihave a 2007 tahoe boat with a 4.3L 220 HP I/O Mercruiser engine. I need step by step instructions (with diagrams if possible) for winterizing and summarizing the boat. Can you help me?… read more
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I have a 2002 Mercruiser inboard 305 with throttlebody injection
I have a 2002 Mercruiser inboard 305 with throttlebody injection ..... twice this year it has failed to start while out on the lake after several hours of running ..... engine will just crank and imme… read more
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Have 03 Yamaha 200 EFI 2 stroke on 21bay boat. Motor will
Have 03 Yamaha 200 EFI 2 stroke on 21'bay boat. Motor will randomly stall while crusing, seems to happen more often the higher the RPM. I let idle for 1+ hour in stall never died. Boat has large fuel … read more
Jeremy R.
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I have a 1996 Marlin 19 foot boat with a 305 engine and mercruiser
I have a 1996 Marlin 19 foot boat with a 305 engine and mercruiser Alpha 1 outdrive. I took it out today and it ran fine for many runs wakeboarding and skiing. As a finale for the day (around 2:00 PM)… read more
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1998 cobalt boat with a 5.7 efi engine. Half way through a
1998 cobalt boat with a 5.7 efi engine. Half way through a day at the lake it started to die at idle when putting the boat in gear. After starting and dying once or twice it refuses to start at all. E… read more
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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
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Im looking at an 1997 2335 chaparral with 5.7 250 hp with
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I purchased a 2006 Seville with a Mercruiser 140hp 3.0L engine.
I purchased a 2006 Seville with a Mercruiser 140hp 3.0L engine. It runs good at idle and half throttle, but at full throttle it does a mix of running good and bogging down (mostly bad then good). Ever… read more
capt ron 1959
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After operating my 2002 Stingray with a 4.3 EFI, I noticed
After operating my 2002 Stingray with a 4.3 EFI, I noticed condensation on top of the carburator and droplets of water falling down the throat. the carburator is cold which I believe is causing the co… read more
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Our Yamaha Waverunner III will not start this year. Evry other
Our Yamaha Waverunner III will not start this year. Evry other year it started after just a few tries. We have installed a brand new Battery, new Spark Plug, engine treatment and dry gas. It acts like… read more
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Mercruiser MCM 3.0 135HP 4cyl (year 2000 Bayliner Capri 1850) Had
Mercruiser MCM 3.0 135HP 4cyl (year 2000 Bayliner Capri 1850) Had 10 gallons treated with Stabil over the winter and added 10 gallons of new gas this month. Started/Idle fine in driveway. First time o… read more
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Meet the Experts:

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Dominick

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Jeff G.

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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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