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I have a 2004 mercruiser 5.0 was running great and then
I have a 2004 mercruiser 5.0 was running great and then wouldn't start. It is getting fuel but no spark. Engine serial number is ***** … read more
Noel Schembri
Noel Schembri
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Ok 1990 stingray with a mercruser 5.0 305. Was starting a
Ok 1990 stingray with a mercruser 5.0 305 . Was starting a few days ago but back firing at fast accelerate , I asked Jason on this sight for help . Drained gas did tune up plugs .035 rotor ,cap . Did … read more
Jason
Jason
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I have a 1989 Cajun with 5.0 , alpha one ,Thunderbolt Ignition.
I have a 1989 Cajun with 5.0 , alpha one ,Thunderbolt Ignition. About three weeks ago I de winterized the boat. After starting it ran fine for several minutes and I started it several times with no pr… read more
K. Kergan
K. Kergan
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Have a mercruiser 5.0L alpha drive that is carbd. The engine
Have a mercruiser 5.0L alpha drive that is carb'd. The engine has about 30 hours on it and when i took it out a couple of weeks ago it ran fine for about 30 minutes. After 30 minutes, at about 2500rpm… read more
Malta Tech
Malta Tech
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I have a 2006 Maxum 20 ski boat with a 5.0 L Mercruiser engine
I have a 2006 Maxum 20' ski boat with a 5.0 L Mercruiser engine and an Alpha outdrive. When the outdrive is raised to the top position, it hits the swim step. Not bad but it should stop before it hits… read more
Malta Tech
Malta Tech
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High School or GED
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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
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Vocational, Technical or Trade Scho
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We have a 2006 montrey 19.5 boat with 3.5 inboard Mercruiser.
We have a 2006 montrey 19.5 boat with 3.5 inboard Mercruiser. The boat has only 60 hrs but having issues when cut off engine after riding for some time, it will not cut back on. Appears something is g… read more
James
James
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Vocational, Technical or Trade Scho
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Boat is 1999 Lund Tyee, 18 ft. I/O. Engine is 4.3 liter V-6
Boat is 1999 Lund Tyee, 18 ft. I/O. Engine is 4.3 liter V-6 Mercruiser, model MCM 4.3 Liter. Thunderbolt ignition. Engine rotation L/H. Alpha leg. Problem: engine starts and runs fine at idle and up t… read more
Whitecap36
Whitecap36
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I have a 1984 Celebirty Boat with a good chevy 350 motor in
I have a 1984 Celebirty Boat with a good chevy 350 motor in it and the floor and stringers are bad. I also have a 1996 Chapparal that has a bad chevy 305 alpha one motor in it. I was wondering on if I… read more
Master Tech
Master Tech
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Last trip to the lake, my 96 Reinell with 305 Chevy and Alpha
Last trip to the lake, my 96 Reinell with 305 Chevy and Alpha Mercruiser outdrive ran perfectly. Last night I used my hose hook-up to test start it and something was not right. There was not any water… read more
James
James
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Vocational, Technical or Trade Scho
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I have a 1986 century boat / with a mercruiser 350 cu 4bb
I have a 1986 century boat / with a mercruiser 350 cu 4bb carb. and a thunder bolt ignition system . it has always run file but, today i ran boat in the lake for about an hour and a half . I felt the … read more
Jeremy R.
Jeremy R.
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Have 4.3 LX mercruiser 1996 has New Rotor,plug wires,spark
Have 4.3 LX mercruiser 1996 has New Rotor,plug wires,spark plugs, Module, sending unit inside the distributor and cap , coil also. It has a thunderbolt ingisition. Cruises down the lake them misfires … read more
K. Kergan
K. Kergan
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1,031 satisfied customers
My husband just bought a used 2001 Bayliner LX Capri boat from
My husband just bought a used 2001 Bayliner LX Capri boat from a boat dealer. When he connects a hose with fast running water to the boat motor, the motor and engine seem to work just fine (in the dri… read more
Whitecap36
Whitecap36
Service Manager/Technician
Vocational, Technical or Trade Scho
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1983 mercruiser alpha 1, 5.0 liter/LX thunderbolt ignition.
1983 mercruiser alpha 1, 5.0 liter/LX thunderbolt ignition. Starts and runs great for a few minutes, pulls a skier, etc. then dies. Restarts, runs briefly, then dies again. Will continue to run at 100… read more
Master Tech
Master Tech
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my boat will turn over but will not start , also the istrument
my boat will turn over but will not start , also the istrument panel has stopped working when i turn rhe switch on what could be the problem… read more
Master Tech
Master Tech
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Hello Have a question about an ignition problem. 1996 mercruiser
Hello: Have a question about an ignition problem. 1996 mercruiser 5.7 LX-V8 THUNDERBOLT V IGNITION. Engine serial 0f746559 Engine starts and runs fine for about 10 minutes, then stumbles and stalls. W… read more
gearheadII
gearheadII
Bachelor's Degree
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Have a Mercruiser Alpha One Sterndrive on a Mercury 305 cu.
Have a Mercruiser Alpha One Sterndrive on a Mercury 305 cu. in. engine. It is a 2003 model. Never have had a problem with it. This spring, doing the first use, it started to have the overheating buzze… read more
Pappy's Sales and Service
Pappy's Sales and Service
Vocational, Technical or Trade Scho
586 satisfied customers
Hi, I have a 1995 Mercruiser 4.3L lx IV thunderbolt ignition.
Hi, I have a 1995 Mercruiser 4.3L lx IV thunderbolt ignition. Motor operates great cold at full throttle, 20 mins later the rpms bounce all over the place over 4000 rpms. I have replace carb, had a sp… read more
Pappy's Sales and Service
Pappy's Sales and Service
Vocational, Technical or Trade Scho
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Meet the Experts:

Ted G.

Ted G.

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Jason

Jason

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Tan

Tan

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Jeff G.

Jeff G.

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Noel Schembri

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Advanced technical diploma

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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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