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We are looking for a replacement motor for our boat but we
we are looking for a replacement motor for our boat but we are discovering there is alot of different 4.3L engines we have the mercruiser GM 4.3L serial # 0D812120 was block cast number of a T01092KP … read more
Noel Schembri
Noel Schembri
Marine Mechanic
Diploma
2,759 satisfied customers
Tan, I just bought a boat this spring and have in it a
Hi Tan, I just bought a boat this spring and have in it a mercruiser 4.3L 190 hp year 1998 with an alpha one gen 2. Have no hour meter, so does not know how many hours on it. Have no problem with it, … read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,507 satisfied customers
I am looking to buy a 2005 Regal 2860 with twin 4.3 and the
I am looking to buy a 2005 Regal 2860 with twin 4.3 and the XDP drives. The boat is MINT with 260 hours and the owner was never notified of the bellows issue and still has the original bellows as far … read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,507 satisfied customers
I am looking to purchase a 1987,32 Bayliner w/twin 260hp Volvo
I am looking to purchase a 1987,32' Bayliner w/twin 260hp Volvo gas fresh water cooled marine engines. Are there any recorded common problems with these engines I need to be aware of? The "transmissio… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,507 satisfied customers
I am in market for used bowrider in $ 25000 range what is
I am in market for used bowrider in $ 25000 range what is the difference in value , reliability and performance etc of the Mercruiser 5.0 TKS 220 HP vs 5.0 MPI 260 HP should I only pursue the later ? … read more
Malta Tech
Malta Tech
Marine Tech
High School or GED
287 satisfied customers
What do you think about the Mercruiser 470 (3.7 ltr) engine?
What do you think about the Mercruiser 470 (3.7 ltr) engine? The guy states he just rebuilt it, up graded the cooling system and alternator.… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
22,804 satisfied customers
I am considering the purchase or a 90 Sea Ray 42 Cruiser
I am considering the purchase or a '90 Sea Ray 42' Cruiser with two MerCruiser Model 7.4L with 1032 hours on them. How many additional hours do I have before a major overhaul? Thank you, John XXXXX XX… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,507 satisfied customers
Hi I have a mercruiser 4.3L V6 MPI with a throttle body Part
Hi I have a mercruiser 4.3L V6 MPI with a throttle body Part No 860320A1, which has been discontinued, the unit has been in salt water and is damaged. It had a new set of seals put in it 5 months ago,… read more
Jeff G.
Jeff G.
Marine Mechanic
Vocational, Technical or Trade Scho
4,730 satisfied customers
i have a 1997 3.0l with a cracked block can i change to a 1992
i have a 1997 3.0l with a cracked block can i change to a 1992 4.3l and how much would it take… read more
James
James
Certified Marine Mechanic
Vocational, Technical or Trade Scho
4,094 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
Inboard/Outboard Mechanic
Vocational, Technical or Trade Scho
1,031 satisfied customers
My boat stalls at 1000 rpm. 6cyl i/o 2002 mercrusier. My mechanic
My boat stalls at 1000 rpm. 6cyl i/o 2002 mercrusier. My mechanic says water is leaking thru manifold inton cylinder. he shows me one sparkplug thru a jewlers glass that may have a minute amount of ru… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,507 satisfied customers
I have a 92 Crownline boat with a MerCruiser 4.3 LX / V6 Alpha
I have a '92 Crownline boat with a MerCruiser 4.3 LX / V6 Alpha One engine with Thunderbolt IV Ignition - it is destroyed due to cracked Manifolds. I have found a rebuilt ready to drop in 4.3 litre (n… read more
Jeremy R.
Jeremy R.
5,362 satisfied customers
what is the average lifespan of a mercruiser 4.3L V6 motor,
what is the average lifespan of a mercruiser 4.3L V6 motor, it runs around a consistant 3600-4800RPM for about 30-45 minuts at a time befor resting. It has had oil changed every 15hours of run or at l… read more
Jason
Jason
Associate Degree
210 satisfied customers
I am thinking of buying a 2007 sea ray 240 sundancer w/ MerCruiser
I am thinking of buying a 2007 sea ray 240 sundancer w/ MerCruiser 5.0L MPI Bravo III. It has been a Salt Water boat in New Jersey. How significant is the issue of FWC versus RWC?… read more
Jeff G.
Jeff G.
Marine Mechanic
Vocational, Technical or Trade Scho
4,730 satisfied customers
Im looking at a boat w a 7.4 Mercruser MPI thats 6 yrs old
Im looking at a boat w a 7.4 Mercruser MPI that's 6 yrs old w a Bravo 3. It's been docked in salt water. The mechanic that I paid to check it said compression was low on 2 cyl. 120 when the rest were … read more
shane j forrest
shane j forrest
Vocational, Technical or Trade Scho
270 satisfied customers
We have just bought a 1999 Bayliner 2452 powered with a Mercruiser
We have just bought a 1999 Bayliner 2452 powered with a Mercruiser 350 mag mpi digital ignition (model MCM350MAGMPI). I am winterizing and I am only able to find one drainplug (blue) at the side of th… read more
Dominick
Dominick
Marine Mechanic
Vocational, Technical or Trade Scho
1,009 satisfied customers
i have a 88 carver santego with twin 98 4.3 ltr mercruisers.
i have a 88 carver santego with twin 98' 4.3 ltr mercruisers. the port motor starts up fine and idles up to wot (wide open throttle) fine at the dock when not in gear. but when underway with drive eng… read more
capt ron 1959
capt ron 1959
Owner/Marine Mechanic
Vocational, Technical or Trade Scho
348 satisfied customers
I have twin Mercruiser 4.3l EFI engines with 434 hours on them.
I have twin Mercruiser 4.3l EFI engines with 434 hours on them. They are 1998 vintage. At what hours should I think about replacing the manifolds. They are one piece manifolds.… read more
Captain Dave
Captain Dave
Charter Captain & I.S. Director
Master's Degree
2,808 satisfied customers
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Meet the Experts:

Ted G.

Ted G.

Rigger, Diagnostician

3,332 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

22,804 satisfied customers

Degree in Marine Technology. Gas and diesel marine mechanic.

Tan

Tan

MerCruiser Certified Technician

11,507 satisfied customers

40 yrs. experience with complete engine repairs both inboard/outboard and MerCruiser Certified Technician.

Jeff G.

Jeff G.

Marine Mechanic

4,730 satisfied customers

42 years experience, Certified Master Technician, All Major Outboards, Sterndrives, Hi-Performance

Noel Schembri

Noel Schembri

Marine Mechanic

2,759 satisfied customers

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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