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Merc 4.3 EFI (TBI) beeps once and stalls at low speed in
merc 4.3 EFI (TBI) beeps once and stalls at low speed in gear. Starts right up, then does the same thing. … read more
Tan
Tan
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Certified Marine Technician
11,490 satisfied customers
Ok here it it i have 1990 stingray with a mercrusier 5.0
ok here it it i have 1990 stingray with a mercrusier 5.0 305. edelbrock 1409 carb. getting back firing when accelerating quickly, any ideas … read more
Jason
Jason
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I have a merc cruiser stern drive with a GM 4.3 motor it has
I have a merc cruiser stern drive with a GM 4.3 motor it has a 350 dual barrel holly carb, however it has popping and misfire noise at around 4000 rpm the 3 plugs on one side are sooted up and the oth… read more
Tan
Tan
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11,490 satisfied customers
I am working on a Merc. 5.7 TBI engine that will run good when
I am working on a Merc. 5.7 TBI engine that will run good when its cold and then after about 10 minutes, the throttle pulses up and down and eventually it stalls. It starts right back up but will then… read more
Jason
Jason
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I have a 115 HP Evenrude E Tech motor. I once run out of fuel.
I have a 115 HP Evenrude E Tech motor. I once run out of fuel. After that the motor run out of power in the 3000 to 5000 rpm range as soon as i want to pull a skier out of the water. Running without a… read more
Charles
Charles
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5,076 satisfied customers
99 bayliner 2655 ciera with a 5.7 liter merc cruiser. Starts
99 bayliner 2655 ciera with a 5.7 liter merc cruiser. Starts fine revs up fine idles fine. Put it in gear and it doesn't have enough power to get up on a plane. Ran it 2 weeks ago and it ran like to t… read more
Noel Schembri
Noel Schembri
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my 1997 5.7 mercruiser is poping thru the throttle body when
my 1997 5.7 mercruiser is poping thru the throttle body when i try to go on plane.thats about 3000 rpm.at low rpm it runs fine and at idle its nice and smooth any ideas?i tried a new fuel filter no di… read more
James
James
Certified Marine Mechanic
Vocational, Technical or Trade Scho
4,094 satisfied customers
Hi, Ive got a 5.7 mercruiser, cranks over but no TBI injector
Hi, Ive got a 5.7 mercruiser, cranks over but no TBI injector firing. Just connected to Mercruiser scan tool. Cranked over and no rpm showing on the screen. check engine light on. Voltage 10.1v min wh… read more
James
James
Certified Marine Mechanic
Vocational, Technical or Trade Scho
4,094 satisfied customers
A 1999 5.7 GSIDPWTR EFI/TBI engine...throttle brought up gradually
A 1999 5.7 GSIDPWTR EFI/TBI engine...throttle brought up gradually will achieve WOT. Quick excelleration...boat has no power. Couldn't pull a skier out of the water. Lacks power whenever under load. B… read more
Jason
Jason
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I Have a 2000 V8 TBI 5.7liter mer, with the timing set spot
I Have a 2000 V8 TBI 5.7liter mer, with the timing set spot on the motor usually goes. However half the time it wont go. I have to turn the distributer to get it to fire. This only happens when its co… read more
Jason
Jason
Marine Mechanic
18,645 satisfied customers
1998 baja boat mercruiser 350 with tbi . Misses coming out
1998 baja boat mercruiser 350 with tbi . Misses coming out of hole the spits and runs 55 mph . Can be crusein then out of nowhere starts missing the give it gas and will miss alittle then run fine. Ha… read more
Jason
Jason
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I have a mercury 60 hp bigfoot motor on a tracker fishin barge
I have a mercury 60 hp bigfoot motor on a tracker fishin barge 22 FT. I've had it a year. I went on the lake and it got up to 4000 rpm but normally it runs at 5200 rpm. Is 5200 reasonable or should I … read more
Jeremy R.
Jeremy R.
5,362 satisfied customers
I have a 1998 colbalt, and it recenlty acted up last time on
I have a 1998 colbalt, and it recenlty acted up last time on water, it would only get up to 30 miles hour top speed and getting there was ruff, when trying to pull up a skier it had no power and in th… read more
Ted G.
Ted G.
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Vocational, Technical or Trade Scho
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Desperate Merc owner...Info 1996 Mercruiser, well kept w/Alpha
Desperate Merc owner...Info: 1996 Mercruiser, well kept w/Alpha 1 Gen 2, 5.7 GM 2 BBL carb; Recently overhauled engine, carb, new impeller, drive serviced... Replaced coil, tank check valve and fuel l… read more
James
James
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Vocational, Technical or Trade Scho
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I have a merc 115hp 4 cycle outboard with 110 hours on it.
I have a merc 115hp 4 cycle outboard with 110 hours on it. The other day it started acting up. It will not idle and the only way to get it to start is to put the throttle forward while starting. As so… read more
Larry B.
Larry B.
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High School or GED
574 satisfied customers
Mercruiser 5.7 FI runs great all day. At end of day motor losses
Mercruiser 5.7 FI runs great all day. At end of day motor losses power pings, clanks, and backfires then dies and wont re start. If i wait 10 to 15 minutes it starts & runs great again for hours.???? … read more
ROCKET
ROCKET
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Vocational, Technical or Trade Scho
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Is there any way to extract codes from a 2004 Mercury 115 without
Is there any way to extract codes from a 2004 Mercury 115 without the factory software and laptop. Also, is it possible to get it to update its fuel map via an O2 sensor without the laptop driven soft… read more
ROCKET
ROCKET
MASTER CERTIFIED TECH
Vocational, Technical or Trade Scho
426 satisfied customers
I have a 1997 7.4 mpi merc engine that wont go above ...
I have a 1997 7.4 mpi merc engine that wont go above 3500rpm unless I unplug the map sensor then I get 4400 rpm I have replaced the map sensor and still have the same problem.… read more
Ted G.
Ted G.
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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

18,645 satisfied customers

Degree in Marine Technology. Gas and diesel marine mechanic.

Tan

Tan

MerCruiser Certified Technician

11,490 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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