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I have a 2007 5.0 mpi Mercruiser which is problematic.
Hello, I have a 2007 5.0 mpi Mercruiser which is problematic. Advancing the throttle from idle slowly (warm or co!d) the motor wants to stall. Pulling the throttle back to idle it always runs smoothly… read more
Boat Doc
Boat Doc
245 satisfied customers
Just looking to correct idle of 4.3l mercruiser after carb
Just looking to correct idle of 4.3l mercruiser after carb rebuild ... Getting some occasional backfiring through the carb and had a previous assessment of incorrect timing Carb was dumping fuel down … read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade Scho
17,310 satisfied customers
I have a 2003 115 4 stroke sat years with about 30 gallons
I have a 2003 115 4 stroke sat for 3 years with about 30 gallons of fuel added staybil to it in fall of each year.Also ran it on muffs in spring. This year i went to lake from storage after adding 15 … read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade Scho
17,310 satisfied customers
I have a SeaRay Sundancer 260 powered by a 350 Mag (MPI) driving
I have a SeaRay Sundancer 260 powered by a 350 Mag (MPI) driving a Bravo 3. It sat unused for almost a year. It has about 150 hours on it. I kept the tank half full and added the proper amount of fuel… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade Scho
17,310 satisfied customers
Accidentally put ten gallons of diesel in my eighty gallon
Accidentally put ten gallons of diesel in my eighty gallon gas tank.have a 2013 Yamaha 250 fourstroke outboard ran it already for about two hours about fifteen gallons .will this hurt my motor… read more
Ted G.
Ted G.
Rigger, Diagnostician
Vocational, Technical or Trade Scho
704 satisfied customers
I installed a mercury 2 stroke 75 hp on a boat that had 50
I installed a mercury 2 stroke 75 hp on a boat that had 50 to 1 mixed fuel in tank .I added about 5 gallons of reg gas.The motor is only starting when I advanced the throttle and runs good when runnin… read more
Noel Schembri
Noel Schembri
Marine mechanic
Diploma
1,736 satisfied customers
Sea Ray 2008, 230 bow rider with merc 350. Starts fine and
Sea Ray 2008, 230 bow rider with merc 350. Starts fine and runs fine, then when it is shut down it either won't start at all or starts and idles very roughly at about 500 rpm. As soon as it is put in … read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade Scho
17,310 satisfied customers
Volvo kad 42p-a. Engine wont start with throttle at low idle.
Volvo kad 42p-a. Engine won't start with throttle at low idle. At approximately half throttle engine starts. 1200rpm than immediately reduces to 950. If throttle is raised no change. If throttle reduc… read more
Noel Schembri
Noel Schembri
Marine mechanic
Diploma
1,736 satisfied customers
I have a Johnson 48 SPL on a Sprint boat I recently purchased.
I have a Johnson 48 SPL on a Sprint boat I recently purchased. What is the ratio for the oil to gas mix? I think it is 50:1. I put 6 gallons of 93 octane in the tank today and 16 oz of Penzoil 2 cycle… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade Scho
17,310 satisfied customers
5.7 1997 volvo penta gas throttle body fuel inject. Situation,
5.7 1997 volvo penta gas throttle body fuel inject. Situation, start boat , idle thru channel until temp warms to 180, run at 3000 rpm for 30-40 mins, idle down to trolling speed for 30 mins or so, go… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade Scho
17,310 satisfied customers
Hello, i own a 2008 Searay 260 sundeck powered by a 496 Mercruiser
Hello, i own a 2008 Searay 260 sundeck powered by a 496 Mercruiser (375hp). 2 weeks ago I was cruising and gauge showed I had about 22% left. All of a sudden the motor just quit on me. I got towed, ad… read more
Jeremy R.
Jeremy R.
MarineTechnician
9,020 satisfied customers
I have a 2000 Crestliner with a 4.3 L sterndrive. It has developed
I have a 2000 Crestliner with a 4.3 L sterndrive. It has developed a high RPM ping (above 3300 RPM) with an intermitent power loss/surger of about 150 RPM. I thought it was bad gas due to sitting over… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,264 satisfied customers
fourwinds volvo pento 5.7 dual prop 280 hp fuel injected fuel
fourwinds volvo pento 5.7 dual prop 280 hp fuel injected fuel rail high and low presure fuel pump replaced the high presure pump and filter bleed air finally got boat running then it starved for fuel … read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,264 satisfied customers
i have an 2005 DF 140. i did not use it for 7 months and so
i have an 2005 DF 140. i did not use it for 7 months and so i threw out all the gas and put 32 gallons of fresh gas in it. i added 28 oz of yamaha fuel stabilizer/conditioner. it starts promptly and i… read more
Captain Dave
Captain Dave
Marine Mechanic
Master's Degree
2,672 satisfied customers
Hi, thinking about a boat purchase.... my biggest concern is
Hi, thinking about a boat purchase.... my biggest concern is motor. What I know right now is.... it is 1987 Bayliner Cuddy Cabin 19.5 ft long. With Volvo Penta 275 I/O motor. It hasn't been in the wat… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,264 satisfied customers
I have a 1999 5.7 EFI 350 that ran great yesterday on the water
I have a 1999 5.7 EFI 350 that ran great yesterday on the water no problems to report, then the next morning I attempted to start it with great difficulty. After replacing, the fuel/water separator fi… read more
Mechman45
Mechman45
Vocational, Technical or Trade School
152 satisfied customers
I have a 1997 24 foot Chapparell with a 5.7 EFI mercruiser
I have a 1997 24 foot Chapparell with a 5.7 EFI mercruiser that wants to stick on high idle alot and the only way to fix it is to shut it off and restart it,also it seems to be running rich,I get lots… read more
Dr. Joe
Dr. Joe
Bachelor's Degree
198 satisfied customers
motor runs great for approx one hour,running full,3/4,1/2,throttle
motor runs great for approx one hour,running full,3/4,1/2,throttle and idle. shut motor off and it won't start after 45 minutes being towed back to dock still won't start. load up and 70 + MILES Home … read more
Jack
Jack
Marine Technician
Vocational, Technical or Trade Scho
54 satisfied customers
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Meet the Experts:

Dominick

Dominick

Marine Mechanic

1,009 satisfied customers

25 Years Experience as Mechanic, 20 Yrs Boat Yard Owner/Mechanic, Factory Certified

Ted G.

Ted G.

Rigger, Diagnostician

704 satisfied customers

40 years boating, Safe boating instruct., Offshore Race promoter, Failure Analysis, Expert Witness

John White

John White

Marine Mechanic

306 satisfied customers

11 years experience working on outboards, inboards, sterndrives & pwcs

Jason

Jason

Marine Mechanic

17,310 satisfied customers

Degree in Marine Technology. Gas and diesel marine mechanic.

Tan

Tan

MerCruiser Certified Technician

11,264 satisfied customers

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

Jeff G.

Jeff G.

Marine Mechanic

4,729 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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