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I just purchased a 1986 Sea Ray 340 sedan bridge and would
I just purchased a 1986 Sea Ray 340 sedan bridge and would like to replace the sea water pump and alternator belts on both engines but cannot find information on how the belts are tension-ed. In parti… read more
Jason
Jason
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Vocational, Technical or Trade School
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I have a Sea Ray 300 Sedan Bridge with twin 260HP Mercruiser
I have a Sea Ray 300 Sedan Bridge with twin 260HP Mercruiser Inboard engines. They run fine but the port engine idles at 1000RPM and the starboard at about 700 how do I synchronize the two engines? … read more
Jason
Jason
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I own a 1989 38 ft. Sea Ray aft cabin with twin Mercruiser
I own a 1989 38 ft. Sea Ray aft cabin with twin Mercruiser 454 cid 350 HP V-8 gas engines, 7.4 L. Boat was driven from Boston to Newport, RI on June 20th. Starboard engine would stall during docking; … read more
Tan
Tan
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I have a 1997, 7.4 MPI Blue Water, inboard #OK261210, in a
I have a 1997, 7.4 MPI Blue Water, inboard #OK261210, in a 33 Sea Ray, and ran the boat for several hours on Saturday and it ran perfectly. I shut it down while at anchor for a few hours and when I re… read more
Gina-Moderator
Gina-Moderator
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I have a 1995 sea ray 370 sundancer with dual carburated 454
I have a 1995 sea ray 370 sundancer with dual carburated 454 engines. The port engine has not been wanting to idle lately but usually restarts. I was driving 3 days ago at 4000 rpms and the port engin… read more
James
James
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I have a 1985 Sea Ray 340 Sedan Bridge boat. The engines were
I have a 1985 Sea Ray 340 Sedan Bridge boat. The engines were replaced in 2004. They are 454 BB gas engines. The engines were not idling as I wanted them to, so I had both carburators rebuilt. Both en… read more
orcamarine
orcamarine
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Twin 454 (340HP) in a 1987 Sea Ray 340SD. Both engines start
Twin 454 (340HP) in a 1987 Sea Ray 340SD. Both engines start and run perfectly but after 2 hours (+/-) the port engine sputters, louses RPM and then stall. Will restart but runs rough at idel. Have ha… read more
Whitecap36
Whitecap36
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I have a 92 Sea Ray with a Mercruiser 4.3 V6 with Thunderbolt
I have a 92 Sea Ray with a Mercruiser 4.3 V6 with Thunderbolt ignition. The problem that I am having is when I am going across the water sometimes it seems to knock when I go to throttle up. It could … read more
Jeremy R.
Jeremy R.
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Have a 260hp mercrusier io with thunderbolt ign. 1800hrs Before
Have a 260hp mercrusier io with thunderbolt ign. 1800hrs Before winterizing the engine for winter engine developed a miss. Replaced plugs no good replaced dist cap no good. replaced wires no good repl… read more
Jeff G.
Jeff G.
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I have twin 1998 Mercruiser 7.4L Inboard engines on my Sea
I have twin 1998 Mercruiser 7.4L Inboard engines on my Sea Ray 330DA and this weekend I noticed that the starboard throttle lever seems to stop working (rpm will not increase) when positioned halfway … read more
Ted G.
Ted G.
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i have a 1989 340DA sea ray with twin 7.4 carb. while out
i have a 1989 340DA sea ray with twin 7.4 carb. while out on the boat last night.. about 40 mins into the cruise heard a "bump" behind myself (starboard engine) sounded like someone closing a cabinet.… read more
capt ron 1959
capt ron 1959
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I have a 1987 Searay with twin GM 4.3L with thunderbolt ignition. Changed
I have a 1987 Searay with twin GM 4.3L with thunderbolt ignition. Changed out the fuel filters at the tanks and on the fuel pumps. Put dry gas in to take care of any water in the gas. Port engine runs… read more
Master Tech
Master Tech
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My 454 magnum, 1990 will start and seems to run fine to about
My 454 magnum, 1990 will start and seems to run fine to about 2500 rpm. then it has severe backfiring. I have checked/replaced fuel and water filter, plugs, distributer cap. I have not checked/replace… read more
Joe
Joe
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I have a 1995 Sea Ray 30 with twin 350s, 5.7L. mercruisers
I have a 1995 Sea Ray 30 with twin 350's, 5.7L. mercruisers that once they come up to temp and when they stall they are very hard to start. Its like they are not getting fuel, I've tried just turning … read more
Master Tech
Master Tech
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i have a sea ray 370 da with carbs.i just hade the carbs rebilt
i have a sea ray 370 da with carbs.i just hade the carbs rebilt one of the engins seams like it is missing some cylenders some times and i get some nocking on and off.what can i check...… read more
Dr. Joe
Dr. Joe
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Good Morning - I have a 2000 Sea Ray 340 Sundancer with
Good Morning - I have a 2000 Sea Ray 340 Sundancer with twin 7.4L Horizons. Took her for her first journey of the season for a 40 mile round trip to Jones Beach air show and upon returning to port, ex… read more
Captain Dave
Captain Dave
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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
TOM
Vocational, Technical or Trade Scho
196 satisfied customers
I have a 1995 Sea Ray with twin 454 big block GM engines. I ...
I have a 1995 Sea Ray with twin 454 big block GM engines. I want to check the timing. I have done this procedute in cars back in the 1990''s and I rember having to disconnect the vacuum advance to set… read more
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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.

Marine Mechanic

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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