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Have a mercury 40 hp. late 80 mod. Starts easy and
have a mercury 40 hp. late 80 mod. Starts easy and accelerate ok until about 1500 rpm. If you give more trotle after that, it did not respond. Have cleaned the carb, and rebuilt the gaspump. compressi… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,264 satisfied customers
1984 115 hp inline 6. Had carbs rebuilt. wont get above 1500
All fuel line and primer bulb have been replaced also.… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,264 satisfied customers
Just bought 77 boat with 76 MERC 1150 MOTOR. Guy told me it
Just bought 77 boat with 76 MERC 1150 MOTOR. Guy told me it was running till he replaced squealing distributor, now it wont fire. … read more
Shane Creekmore
Shane Creekmore
Tech
High School or GED
308 satisfied customers
I have a 1987 mercury 200. Boat was running fine the
I have a 1987 mercury 200. Boat was running fine the suddenly won't go over 2-3k rpm under a load. I have checked resistance on stator and trigger both are in spec. I have replaced plugs ( ngk BU8H) a… read more
Noel Schembri
Noel Schembri
Marine mechanic
Diploma
1,740 satisfied customers
I recently purchased a 1987 Mercury 115 tower of power
I recently purchased a 1987 Mercury 115 tower of power outboard - inline 6. It has Rough starting and idling and BOG issue. It will "only" start/ idle when we give it throttle in neutral (advance the … read more
Michael
Michael
master marine technician/charter captain
Vocational, Technical or Trade Scho
256 satisfied customers
1983 Mercury 115 HP outboard stalls/dies after revving up to
1983 Mercury 115 HP outboard stalls/dies after revving up to about 1200 RPM - but only when trying to accelerate in forward or reverse gear. Motor usually starts OK and idles fine and will rev up to h… read more
Jeff G.
Jeff G.
Marine Mechanic
4,730 satisfied customers
I just bought a 1985 115 hp merc. When I took it for a ride
I just bought a 1985 115 hp merc. When I took it for a ride it was hard to start. When it finally did I drove it for 2 minutes running good and all of the sudden it started missing on some cylinders c… read more
Charles
Charles
Certified Mercury Tech
5,078 satisfied customers
I have a 2002 mercury 125. It starts and idles good but will
I have a 2002 mercury 125. It starts and idles good but will not get up on plain. It takes forever to get up when it does then it seems to run ok. I cleaned the carbs, changed plugs, put a new primer … read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,264 satisfied customers
I have a 1972 Mercury 800 4 cyl with Thunderbolt ignition.
I have a 1972 Mercury 800 4 cyl with Thunderbolt ignition. My problem is no spark. I bought it in May and it has fired up twice but not in a row, or recently. I have followed the trouble shooting guid… read more
Malta Tech
Malta Tech
Marine Tech
High School or GED
287 satisfied customers
I have a 1983 3 cyl 70 hp Mercury thunderbolt. Ran great earlier
I have a 1983 3 cyl 70 hp Mercury thunderbolt. Ran great earlier this month but now will cut out when throttle is advanced. I recently replaced trigger, stator, and all wiring under the cover. As I sa… read more
Jeremy R.
Jeremy R.
5,362 satisfied customers
I have a 40 hp mercury motor. I was out on the water and all
I have a 40 hp mercury motor. I was out on the water and all of a sudden it just died at idle. Got home to start to diagnose the issue. Found the voltage regulator connections were burnt. The tachomet… read more
Jeff G.
Jeff G.
Marine Mechanic
4,730 satisfied customers
I have a 1991 100hp mercury outboard. It starts and idles just
I have a 1991 100hp mercury outboard. It starts and idles just fine but when I try to take off it misses and just runs rough. It has a new trigger, power pack, all cylinders get spark and the carbs ha… read more
Jeff G.
Jeff G.
Marine Mechanic
4,730 satisfied customers
my but will rev up with just the throttle but when i drop it
my but will rev up with just the throttle but when i drop it down in gear it act like it starving for gasd it wont rev all the way up..what causes this… read more
Jeff G.
Jeff G.
Marine Mechanic
4,730 satisfied customers
2005 Mercury 115/80 jet 2 stroke oil injection removed, replaced
2005 Mercury 115/80 jet 2 stroke oil injection removed, replaced all fuel system rebuilt carbs 2 times and fuel pump, ruled out fuel sys. It has bad skip at aprox 2500 rpm's/ (no tact) almost on plane… read more
Whitecap36
Whitecap36
Service Manager/Technician
Vocational, Technical or Trade Scho
1,545 satisfied customers
I have a 1974 40 hp mercury (402) electric start, it starts
I have a 1974 40 hp mercury (402) electric start, it starts great runs about 30 minutes and just shuts down . I've gone thru the basic troubleshooting its getting feul but no spark to either plug .If … read more
Jeff G.
Jeff G.
Marine Mechanic
4,730 satisfied customers
I have a 77 Glastron GT 150 with a 850 Mercury Thunderbolt.
I have a '77 Glastron GT 150 with a 850 Mercury Thunderbolt. Last week we mixed too much oil in the gas and after a little while the engine quit running. Just prior to it shutting down there was a los… read more
capt ron 1959
capt ron 1959
Owner/Marine Mechanic
Vocational, Technical or Trade Scho
348 satisfied customers
WHAT SHOULD THE FUEL PRESSURE BE ON A 1989 350 CHEVY INBOARD
WHAT SHOULD THE FUEL PRESSURE BE ON A 1989 350 CHEVY INBOARD MOTOR. IT HAS A 4 BARREL CARB. WHEN I RUN THIS AT WOT---AFTER IT GETS PLAINED OUT, IT ACTS AS IT IS STARVING FOR FUEL?… read more
briggs archer
briggs archer
master marine mechanic
Associate Degree
374 satisfied customers
I have a 2002 Mercury xr6 150 hp. It was running fine until ...
I have a 2002 Mercury xr6 150 hp. It was running fine until I shut if off, and restarted. It began running very rough. As I started back to the dock I started playing with the key switch. With the key… read more
Larry B.
Larry B.
Marine Service Tech
High School or GED
574 satisfied customers
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Meet the Experts:

Dominick

Dominick

Marine Mechanic

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

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Ted G.

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John White

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Jason

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Tan

Tan

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Jeff G.

Jeff G.

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Captain Dave

Captain Dave

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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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