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I have a 1995 7.4 Thunderbolt. Has always run fine except
I have a 1995 7.4 Thunderbolt. Has always run fine except for hard to start, In June in quit while running down the lake, Would restrt after a cool down period. Determined the coil was bad and replace… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade Scho
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My boat ran fine for weeks. Took it out today and it started
My boat ran fine for weeks. Took it out today and it started right up. Went to do some fishing and went to start when I was done and all it did was crank. I thought I was stranded. Finally about 30 mi… read more
Tan
Tan
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Certified Marine Technician
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No spark at plugs but have spark from coil when i put spark
Hi, no spark at plugs but have spark from coil when i put spark plug directly into coil lead … read more
Noel Schembri
Noel Schembri
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I have a mercury 4 stroke 60 hp 2003 motor. I was on a trip
I have a mercury 4 stroke 60 hp 2003 motor. I was on a trip fishing the motor ran fine. stopped to fish then decided to move to another spot, started the motor pushed the throttle forward but it would… read more
Charles
Charles
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I have a volvo penta 5.7 EFi, most of the time it starts
I have a volvo penta 5.7 EFi, most of the time it starts fine and runs smoothly. However - it occasionally starts extremely rough like everything is out of sync. I'm not sure if cylinders are not firi… read more
Jason
Jason
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Vocational, Technical or Trade Scho
18,659 satisfied customers
I have a 1993 5L OMC I/O (Ford block). While running at
I have a 1993 5L OMC I/O (Ford block). While running at 3,000 to 3500 RPM the engine stutters, regains power will stutter again, sometime backfire. Their is no water in the water separator and the fil… read more
Jason
Jason
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Vocational, Technical or Trade Scho
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I have a 1996 Chris Craft Crowne with twin 350 Crusaders (carbs
I have a 1996 Chris Craft Crowne with twin 350 Crusaders (carbs with electronic ignition). The starboard engine turns but won't start. This issue happened last year and was fixed by changing the ignit… read more
Jason
Jason
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Vocational, Technical or Trade Scho
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2004 sea ray 5.7 mercruiser 350 mag crank no start. New plugs,
2004 sea ray 5.7 mercruiser 350 mag crank no start. New plugs, rotor, cap, IAC. Let it sit overnight fires up. Run for just a few mi Utes and won't restart.… read more
briggs archer
briggs archer
master marine mechanic
Associate Degree
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I have a Volvo penta 5.0 fl. Its in a 1850 glass Tron fish
I have a Volvo penta 5.0 fl. It's in a 1850 glass Tron fish and ski. I took it out of storage this summer after it was put away running perfect last season. Now after about five minutes of 3000 rpm 35… read more
Jason
Jason
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Vocational, Technical or Trade Scho
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hey my name is XXXXX XXXXX im working on a 2005 crownline
hey my name is XXXXX XXXXX i'm working on a 2005 crownline 216 it has a 5.0 ltr mercruiser mpi serial number 0w034306. the boat will run up to operating temp and then as soon as you try and put load o… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade Scho
18,659 satisfied customers
I ran my boat yesterday for about 30 minutes and it ran fine
I ran my boat yesterday for about 30 minutes and it ran fine with no misfires or anything. I turned the engine off and sat for a few minutes and went to restart and the boat turned over but the engine… read more
James
James
Certified Marine Mechanic
Vocational, Technical or Trade Scho
4,094 satisfied customers
My 20007 Nautique 226 with PCM ZR6 (@80 hours) ran fine last
My 20007 Nautique 226 with PCM ZR6 (@80 hours) ran fine last summer, was winterized and stored in a cave. When I pulled the boat out of storage I filled boat up with non-ethanol premium grade fuel. Wh… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade Scho
18,659 satisfied customers
97 malibu response. indmar 5.7 / monsoon with HEI Dist and
97 malibu response. indmar 5.7 / monsoon with HEI Dist and MPI. Boat ran fine skiing and then stopped to talk to friends, would not restart (turns over but no fuel no spark) finally started after 15 m… read more
James
James
Certified Marine Mechanic
Vocational, Technical or Trade Scho
4,094 satisfied customers
1989 Johnson Outboard 90 HP Changed the spark plugs. Starts
1989 Johnson Outboard 90 HP: Changed the spark plugs. Starts great when engine is cold. Warm up and run maybe five miles. Turn the engine off use the front trolling motor for a half hour. Try to resta… read more
Jason
Jason
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Vocational, Technical or Trade Scho
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Have a 260hp mercrusier io with thunderbolt ign. 1800hrs Before
Have a 260hp mercrusier io with thunderbolt ign. 1800hrs Before winterizing the engine for winter engine developed a miss. Replaced plugs no good replaced dist cap no good. replaced wires no good repl… read more
Jeff G.
Jeff G.
Marine Mechanic
Vocational, Technical or Trade Scho
4,729 satisfied customers
I changed the points, condenser and rotor in my 1980 305 cid
I changed the points, condenser and rotor in my 1980 305 cid mercruier and it ran well for about an hour. Then it started to run a bit rough, wouldn't accelerate, hesitated... but still ran. When I go… read more
Whitecap36
Whitecap36
Service Manager/Technician
Vocational, Technical or Trade Scho
1,545 satisfied customers
I have a 95 MerCruiser 5.7, Thunderbolt IV, Serial #OF367661,
I have a '95 MerCruiser 5.7, Thunderbolt IV, Serial #OF367661, and Weber carb. This motor has a serious issue. It will start and run fine for a little while, then start missing out bad. It usually sta… read more
K. Kergan
K. Kergan
Inboard/Outboard Mechanic
Vocational, Technical or Trade Scho
1,031 satisfied customers
i have a 2005 four winns 4.3 mercury v6 i keep fouling a plug
i have a 2005 four winns 4.3 mercury v6 i keep fouling a plug causing my boat to sputter and loose power i wont go over 4000rpm… read more
Joe
Joe
Owner Kingsland Auto & Marine Services
Vocational, Technical or Trade Scho
1,374 satisfied customers
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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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