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I have a 115 mercury 4 stroke 2016 I use ethanol free gas I
I have a 115 mercury 4 stroke 2016 I use ethanol free gas I just had the engine service mantinance done took boat out ran good all day just as we were going in I was running at 25 miles or noticed a c… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade Scho
18,277 satisfied customers
2005 mercury optimax 115 HP turns over but will not start.
2005 mercury optimax 115 HP turns over but will not start. it started and ran well my last time out then suddenly stopped. i brought it back and I cleaned and tested the fuel pumps and they worked fin… read more
Charles
Charles
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No spark. Motor started fine 1 week ago and then today it
Motor started fine 1 week ago and then today it wont start. Ive just hooked up a spark tester and im getting no spark to any cylinder … read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade Scho
18,277 satisfied customers
I have a 2011 115 4 stroke Mercury I changed the gas filters
I have a 2011 115 4 stroke Mercury I changed the gas filters ,air and oil. It will run for 5 minutes and then stalls. Will set for 10 minutes and run for a few minutes and stall again. … read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade Scho
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I have a 1985 mercury 115 3cly 2 cylinder 2 stroke. my
I have a 1985 mercury 115 3cly 2 cylinder 2 stroke . my engine wont start I ve change starter because the shaft wont go up to connect to spin the top . ive check my votage I have 12.5 going all around… read more
Jason
Jason
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Vocational, Technical or Trade Scho
18,277 satisfied customers
I have a 2005 200 HPDI that has a no start situation. I hav=ce
I have a 2005 200 HPDI that has a no start situation. I hav=ce checked evertyhing and all checks good. Have replace injector drivers with two different sets, I have tried another ecu. cpu sensor, HP p… read more
Charles
Charles
Certified Mercury Tech
5,376 satisfied customers
This season my 2007 115 mercury 4 stroke is idling rough in neutral. Almost sounds like it
This season my 2007 115 mercury 4 stroke is idling rough in neutral. Almost sounds like it has an ignition miss. Runs great otherwise. I have replaced the spark plugs and tried a couple different fuel… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade Scho
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Boat sat years.it's a 2012 mercury 115 4 stroke.I replaced
Boat sat for two years.it's a 2012 mercury 115 4 stroke.I replaced plugs fuel and fuel filter put fresh gas in it still runs rough after 15 min of run @@nd added mercury fuel cleaner.how long does it … read more
Jason
Jason
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Vocational, Technical or Trade Scho
18,277 satisfied customers
I have a 25 EFI that crank but doesn't start. I just replaced
I have a 25 EFI that crank but doesn't start. I just replaced the plugs. It was running before I changed the plugs. I replaced the fuel filter and put new fuel in… read more
MarineService8
MarineService8
34 satisfied customers
My name is Gene I have a 115 hp mercury optimax that runs
My name is Gene I have a 115 hp mercury optimax that runs real well for about 30 to 45 min. and stops. It well start again in about 10 to 15 min. Do you know what could be causing this,and what should… read more
Charles
Charles
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I have a Mercury 115 Optimax ser. no.(###) ###-####D. This motor
I have a Mercury 115 Optimax ser. no.(###) ###-####D. This motor has sat about a year without running. Tried to start it today. Wouldn't start. I discovered that every time I turned the ignition on th… read more
Jason
Jason
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Vocational, Technical or Trade Scho
18,277 satisfied customers
My outboard engine does not rev like it did last year, it runs
My outboard engine does not rev like it did last year, it runs about 7 MPH less than it did. When I accelerate and when the engine gets to around 6K RPM it dies, when running under 6K it is fine, what… read more
Charles
Charles
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5,376 satisfied customers
We keep blowing a fuse in the mercury optimax 115, 2007. The
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Aloha from Hawaii, I have a 2007 Optimax, serial #1B491896.
Aloha from Hawaii, I have a 2007 Optimax, serial #1B491896. I am getting 4 beeps every two minutes, and a continual beep at approximately 4000 rpms. I have drained the fuel filter container of water (… read more
orcamarine
orcamarine
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My 115 outboard runs 25% power at full throttle. Changed plugs,
My 115 outboard runs 25% power at full throttle. Changed plugs, replaced fuel line, cleaned/checked fuel filter. 3 of four plugs showed black discoloration.… read more
Jeff G.
Jeff G.
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Vocational, Technical or Trade Scho
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Have a 2009 Mercury 115 hp 4 stroke with only about 30 hrs.
Have a 2009 Mercury 115 hp 4 stroke with only about 30 hrs. Ran great a week ago...this morning almost did not start...gave extra throttle...started but ran very rough and looked like steam coming ot … read more
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Jeremy R.
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Quicksilver 640 weekend with mercury EFI 115 4 stroke I have a quicksilver weekend 640 with mercury 115 EFI 4 stroke out 2008 i am having a problems with performance , it was going at around 27 noths … read more
Jeremy R.
Jeremy R.
5,362 satisfied customers
hi i have a 1982-83 25 hp Johnson out board motor that has
hi i have a 1982-83 25 hp Johnson out board motor that has a bad flat spot in the carby at about a quarter to half throtle, ive pulled the carby apart and cleaned it out but have the same problem. can… read more
Tan
Tan
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