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I have a boat with a mercruiser 4.3 thunderbolt. It will not
I have a boat with a mercruiser 4.3 thunderbolt. It will not fire. I have checked spark plugs and they are fine. replaced distributor cap, rotor and coil.… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
18,955 satisfied customers
I have a late 80s MerCruiser marine engine 4.3 l. Does
I have a late 80s MerCruiser marine engine 4.3 l. Does anyone know the base engine timing setting.… read more
Tan
Tan
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Certified Marine Technician
11,406 satisfied customers
4.3 MERCRUISER TBI PUT NEW MANIFOLDS ON ENGINE, STARTED
4.3 MERCRUISER TBI PUT NEW MANIFOLDS ON ENGINE, STARTED ENGINE DIDN'T LIKE SOUND ALSO NOTICED WATER LEAK FROM TORX PLUG ON TOP OF MANIFOLD ON CYLINDERS 1,3,5, SIDE. SECURED TORX PLUG PROBLEM WENT TO R… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
18,955 satisfied customers
I have a Chapperal 250 signature with a Mercruiser 350
i have a Chapperal 250 signature with a Mercruiser 350 engine. There are only 260 hours on the boat. … read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,406 satisfied customers
I have a Blue Water Boat with 4.3 L Mercruiser I/O motor. One
I have a Blue Water Boat with 4.3 L Mercruiser I/O motor. One of my adult kids borrowed the boat and ruined the lift blower when trying to raise the boat. It sat inn the water for over a week while I … read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
18,955 satisfied customers
My name is ***** ***** I'm currently working on a freinds
Hello my name is ***** ***** I'm currently working on a freinds 86 sea ray with a 260 mercruiser I/O and its getting water into cylinders 3 / 7 / 4 / 6... not enough to hydrolock the engine but its ru… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,406 satisfied customers
I have a 1989 Sea Ray with a Yamaha 4.3 L stern drive, I have
I have a 1989 Sea Ray with a Yamaha 4.3 L stern drive, I have to replace the power steering control valve. I have found an used unit from a 1996 will it fit on the 1989 The 1996 casting number is XXXX… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
18,955 satisfied customers
Sir, I have a 1997 Mercruiser 4.3 V6 in a Bayliner Capri.
Sir, I have a 1997 Mercruiser 4.3 V6 in a Bayliner Capri. Three weekends ago, I had the boat on the water and it ran beautifully. I turned the engine off, retrailered the boat and brought it home. Las… read more
Jason
Jason
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Vocational, Technical or Trade School
18,955 satisfied customers
I am looking for anyone who has experience in seeing a inboard
I am looking for anyone who has experience in seeing a inboard motor damaged by water after it was winterized. were someone had poured water down the carb and main water pump hoses in the middle of th… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
18,955 satisfied customers
Have a 1992 Bayliner Trophy with 3 liter and alpha leg. Raw
Have a 1992 Bayliner Trophy with 3 liter and alpha leg. Raw water used in salt water and motor is done. Was badly underpowered and am considering repowering with 4.3 (carbed or MPI ?) Boat plate indic… read more
K. Kergan
K. Kergan
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Vocational, Technical or Trade Scho
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got an 89 23ft searay 7.4 mercruiser and out of the blue after
got an 89 23ft searay 7.4 mercruiser and out of the blue after 6 times in the water was going down lake and engine filled with water. needless to say ruined. this question.? found piston loose from ro… read more
Jeremy R.
Jeremy R.
5,362 satisfied customers
I have an 18 foot Celebrity with a 4.3 inboard, with mercruiser
I have an 18 foot Celebrity with a 4.3 inboard, with mercruiser outdrive. I recently found water in the oil and have noticed that the exhaust bellow to the out drive is almost torn into. Could this be… read more
K. Kergan
K. Kergan
Inboard/Outboard Mechanic
Vocational, Technical or Trade Scho
1,031 satisfied customers
I have a 2000 model Mercruiser 4.3 v6 engine in my boat. When
I have a 2000 model Mercruiser 4.3 v6 engine in my boat. When I checked oil after winter storage, found oil milky. Changed oil, all was milky and oil fliter milky oil also. Have not ran just turned ov… read more
Jeff G.
Jeff G.
Marine Mechanic
Vocational, Technical or Trade Scho
4,730 satisfied customers
I HAVE A STINGRAY FITTED WITH A 190 HP V6 MERCRUISER ,ITS FIVE
I HAVE A STINGRAY FITTED WITH A 190 HP V6 MERCRUISER ,ITS FIVE AND HALF YEARS OLD BUT ONLY 19 HOURS ON THE CLOCK.I TOOK IT TO THE WATER YESTERDAY,AFTER DRIVIND FOR HALF AN HOUR I STOPPED THE ENGINE AN… read more
Whitecap36
Whitecap36
Service Manager/Technician
Vocational, Technical or Trade Scho
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on my 4.3 mercruiser engine, had moisture on plugs #6 and #4,
on my 4.3 mercruiser engine, had moisture on plugs #6 and #4, also low compression on number 6 clyinder. and a slight knock on either inboard side or outboard side. talked to my mechanic who did the t… read more
Master Tech
Master Tech
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Vocational, Technical or Trade Scho
1,168 satisfied customers
I have a 1988 Thundercraft Temptation 265 thats powered by
I have a 1988 Thundercraft Temptation 265 that's powered by 2 x 205 V6 engines W/Alpha1 drives. I'd like to re-power the boat and was wondering what would be recommended. My options, (I think), are #1… read more
Master Tech
Master Tech
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Vocational, Technical or Trade Scho
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I have a 4.3 L 2001 Alpha 1 sterndrive, water is getting into
I have a 4.3 L 2001 Alpha 1 sterndrive, water is getting into the crankcase. Where do I start testing for the cause of the problem.… read more
Master Tech
Master Tech
Marine Technician
Vocational, Technical or Trade Scho
1,168 satisfied customers
my boat motor is leaking water out of the spark plugs, what
my boat motor is leaking water out of the spark plugs, what should i do? Engine is still running good even though the water is pouring out around the spark plugs. What is causing this to happen?… read more
Dominick
Dominick
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Vocational, Technical or Trade Scho
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Meet the Experts:

Ted G.

Ted G.

Rigger, Diagnostician

1,074 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

18,955 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.

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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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