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I have just sea trialed new 300 four stroke yamahas two station
I have just sea trialed new 300 four stroke yamahas two station controls evreything works fine but at 4000 + rpms ,the starboard motor shuts off. Ive run it with just two motors in every combination i… read more
Clamp-onTech
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Sir, I have twin 2010 8.1S Mercruiser inboards in a 1997 Formula
Sir, I have twin 2010 8.1S Mercruiser inboards in a 1997 Formula PC34. The Port engine runs up to 4400 RPM which is perfect. The Starboard engine runs slowly to 3800 RPM. Asked my diver to check the p… read more
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Noel
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I have twin volvo 8.1 efi with a 120 gal fuel tank which had
I have twin volvo 8.1 efi with a 120 gal fuel tank which had 25 gallons of gas when i added a full bottle of Startron Enzyme treatment. Shortly thereafter the port engine died and the starboard strugg… read more
Tan
Tan
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Having problems with a 290 Amberjack as well...have twin 5.0
Having problems with a 290 Amberjack as well...have twin 5.0 mercruisers. The starboard engine starts right up. The port doesn't start and there is no audible alarm. I can use the emergency switch and… read more
Jason
Jason
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1998 Mercruiser 5.7l EFI starboard engine, fouls plugs after
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Tan
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I have twin mercruiser 5.0 2002 engines. Gimbles/ shift cables
I have twin mercruiser 5.0 2002 engines. Gimbles/ shift cables were just replaced, engines out- prior had no problems with alarms or stalls. Now back in water and I have an intermittent 2 minute alarm… read more
Jason
Jason
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I have twin mercruiser engines in my 32 boat. At idle and
I have twin mercruiser engines in my 32' boat. At idle and low rpms the engines run smoothly and seem fine. As the rpms increase to 3000 and above the starboard engine lags behind and won't make 4000 … read more
Ted G.
Ted G.
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Good evening, I have a 2002 Silverton 352 with twin Mercruiser
Good evening, I have a 2002 Silverton 352 with twin Mercruiser 8.1 Horizons. 370 hours. Boat runs excellent. Port engine lately will not achieve rpm over 3700. Starboard will WOT at 4150. The throttle… read more
Ted G.
Ted G.
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I have twin turbo charged Detroit 671s (1990)in my 56 Ocean
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Jason
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Have twin 2007 Mercruiser 8.1S fuel injected inboards on a
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Jason
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97 albermarle twin inboard 5.8 efi volvo penta. port side
97 albermarle twin inboard 5.8 efi volvo penta. port side engine has a real basic idle for thirty seconds and then shuts down. unable to give it any throttle because it stalls. restarts and will idle … read more
Jason
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I HAVE A WELLCRAFT 330 COASTAL TWIN 8.1 GAS ENGINES MY STARBOARD
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Jeremy R
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I have a 2005 regal with twin mercruiser 496 mag 8.1 engines...
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Noel
Noel
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i have a 2000 formula 330 sun sport with twin 7.4 EFI engines,
i have a 2000 formula 330 sun sport with twin 7.4 EFI engines, 2 weeks ago i was out for a 2 hour ride outside temp 100 deg, water temp 90, both engines and generator were being used , got back to the… read more
Tan
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I have a Bayliner 3055 with twin mercruiser 5 litre engines.
I have a Bayliner 3055 with twin mercruiser 5 litre engines. The port engine has recently started cutting out after running in some instances for 40 minutes and normaly @ 1200 revs. then refuses to st… read more
Jeremy R
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1,069 satisfied customers
my mercruise 220hp v8 stern drive was running fine, then after
my mercruise 220hp v8 stern drive was running fine, then after abt 1hr is stopped. I restarted the engine again straight way.... it would run for another 2minbs at just above idle steep then stop. Thi… read more
Jeremy R
Jeremy R
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I have a 1979 bertram 28 with twin 1995 260hp mercruisers,
I have a 1979 bertram 28 with twin 1995 260hp mercruisers, at idle and cruise both engines run great, but after 3500rpm the port engine struggles to excel anymore, and only reaches about 3800rpm the p… read more
Captain Dave
Captain Dave
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Master's Degree
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I have twin 5.7 Mercruiser I/Os with Bravo II outdrives.
I have twin 5.7 Mercruiser I/O's with Bravo II outdrives. I am having trouble with the engines stalling while cruising at low speed. Once an engine stalls, it will not always immediately restart. I ha… read more
TOM
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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.

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

John White

John White

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Jason

Jason

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Degree in Marine Technology. Gas and diesel marine mechanic.

Tan

Tan

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

Jeff G.

Jeff G.

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4,729 satisfied customers

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

Captain Dave

Captain Dave

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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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