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I have a 03' mastercraft x30. Last week on way back to the
I have a 03' mastercraft x30. Last week on way back to the marina the motor quit at about 4200 rpm. I got it started again but it died a few minutes later. MC have a historic fuel pump issue so I repl… read more
CalebA820
CalebA820
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Gone thru entire engine. it is a mercruiser 6.2 and it runs
gone thru entire engine. it is a mercruiser 6.2 and it runs smooth as can be until it hits 1800 rpm and then sputters. and I have to back it down. fuel was first guess but doesn't seem to be the issue… read more
DAVID BALLARD
DAVID BALLARD
OWNER
Vocational, Technical or Trade School
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After about an hour of running my port engine rpm drop from
After about an hour of running my port engine rpm drop from 3500 rpm to 1000, then goes up and down. Eventually it will steady at 2100 but will not go higher. After turning off for about a half hour i… read more
Jason
Jason
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Vocational, Technical or Trade School
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I have a 33 ft carver w/twin 360 crusaders, the port engine
I have a 33 ft carver w/twin 360 crusaders, the port engine breaks down and quits after running for approx 30 minutes at 2900 rpms. I wait about 5 mins and it will restart but won't run over 2000 rpms… read more
Tan
Tan
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I'm pat we have a sea ray 205 with a mercruiser 5.0 mpi
Hi I'm pat we have a sea ray 205 with a mercruiser 5.0 mpi has no power down the boat doesn't over heat runs smooth and when gets up too speed it's fine… read more
Jason
Jason
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Vocational, Technical or Trade School
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Have 70 HP 1978 Mercury Outboard 2 cycle. Motor was running
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Joe
Joe
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Vocational, Technical or Trade Scho
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Port engine of our 355 Carver yacht (96 454 Crusader) will
Port engine of our 355 Carver yacht ('96 454 Crusader) will not restart after engine is shut down. After 24 - 48 hours it will start just fine. This has been getting progressively worse since we got b… read more
Jason
Jason
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Vocational, Technical or Trade School
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Hi, I have a 2006 Searay Amberjack 290 with twin T-VD-350 Mercruiser
Hi, I have a 2006 Searay Amberjack 290 with twin T-VD-350 Mercruiser Marnum MPI Horizon engines (T-300 hp). It is inboard/v-drive, fuel injected, and has the Mercruiser Smart Craft System. The engines… read more
Ted G.
Ted G.
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I have a 2002 Crusiers 3075 boat with two 5.0 Volvo Penta EFI
I have a 2002 Crusiers 3075 boat with two 5.0 Volvo Penta EFI stern drive engines. The boat was summerized and runs fine at wake speed. When power is applied the port drive bogs down and backfires and… read more
James
James
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Vocational, Technical or Trade Scho
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I have a 320 sea ray with 6.2 mercs with v-drives, my port
I have a 320 sea ray with 6.2 mercrusier horison with v-drives, my port engine after about 10 min at 4400 rpm I loose power, it will drop off about 2000 rpm. it runs fine at 1500 to 2000 rpm… read more
Dominick
Dominick
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Vocational, Technical or Trade Scho
1,009 satisfied customers
I have Meridian 381 (2004) that has 2 Mecruiser 8.1(Gasoline).
I have Meridian 381 (2004) that has 2 Mecruiser 8.1(Gasoline). 2 weeks ago, the port engine lost RPM when it ran a couple of hours or more at high RPM(3000) on my way to San Juan island. I continue na… read more
Ted G.
Ted G.
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Have 88 454 Mercruisers in a Sea Ray 430 Convertible. Recently
Have '88 454 Mercruisers in a Sea Ray 430 Convertible. Recently the starboard engine has started to shut down after running for 45 min. to an hour. It has never shut down at higher RPM's 3800 cruise o… read more
Joe
Joe
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Vocational, Technical or Trade Scho
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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
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I have a 2003 Four Winns Funship deckboat powered by a 5.7
I have a 2003 Four Winns Funship deckboat powered by a 5.7 ltr Volvo Penta dualprop GXI. My first time in the water this year the boat temp. went up and hence took it back to the repair shop who previ… read more
briggs archer
briggs archer
master marine mechanic
Associate Degree
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1991 Mariah open bow, 4.3L Mercruiser Alpha One 1. At higher
1991 Mariah open bow, 4.3L Mercruiser Alpha One 1. At higher RPMs (above 3500 or so, typical holeshot), the engine smoothly revs up, brings the boat up on plane, then dies. RPM gauge drops almost inst… read more
Scott
Scott
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Vocational, Technical or Trade Scho
543 satisfied customers
Carver 350 Mariner. 2001. only 195 hrs. Momentary top RPM 4,300.
Carver 350 Mariner. 2001. only 195 hrs. Momentary top RPM 4,300. Cruise at 3,800 RPM getting 16 knots. Only 0.5 mpg?? Hull is clean. At 105 hrs: starboard engine with burn valve, pulverized........new… read more
mercmastertech
mercmastertech
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Just installed a partially dressed remanufacturered 260HP 350
Just installed a partially dressed remanufacturered 260HP 350 Chevy long block (5.7 Mercruiser). Have a Alpha 1 Gen II OD. We replaced starter, 140*thermostat and housing, GLM manifolds and risers, OD… read more
ROCKET
ROCKET
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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
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Meet the Experts:

Ted G.

Ted G.

Rigger, Diagnostician

2,678 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

22,043 satisfied customers

Degree in Marine Technology. Gas and diesel marine mechanic.

Tan

Tan

MerCruiser Certified Technician

11,409 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

3,847 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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