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Had someone look at my 2000 outboard, he mad some fixes but
had someone look at my 2000 outboard, he mad some fixes but when I was on the water same issues are there. Want to talk to someone experienced with 4 stroke outboard motors … read more
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Noel Schembri
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Yamaha 9.9 4 stroke, dies when increasing gas, looks like it
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Charles
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Engine will not stay on unless the choke remains open. We
Engine will not stay on unless the choke remains open … read more
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Tan
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I have a 2013 Mercury 9.9 electric start 4 stroke It won't
Hi I have a 2013 Mercury 9.9 electric start 4 stroke It won't idle and only runs at about half throttle It has run quite a few hours with ethanol based additive Carb has been cleaned and re cleaned an… read more
Jason
Jason
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I have a 40hp, older vintage. Runs very well accept when i
I have a 40hp, older vintage. Runs very well accept when i gets warm it wants to bog down when I'm running at slow speeds. Seems to run better if I speed up… read more
Jeff G.
Jeff G.
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My 9.9 Mercury 4 stroke outboard drops to idle. I have had
My 9.9 Mercury 4 stroke outboard drops to idle. I have had the carb and water pump checked. Any other ideas?… read more
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Jason
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22,508 satisfied customers
have a 9.9 hp Mercury 4 stroke pro on my 620vs Ranger , got
have a 9.9 hp Mercury 4 stroke pro on my 620vs Ranger , got engine new will start if i raise throttle but will not idle , have not even run it yet as soon as i put throttle in idle engine stalls so i … read more
marinedoc
marinedoc
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1998 suzuki v twin 4 stroke 25 hp outboard starts to missfire
1998 suzuki v twin 4 stroke 25 hp outboard starts to missfire at about half throttle and revs will not increase, sound like running on one cylinder. Sometimes when warm second cylinder seems to fire a… read more
orcamarine
orcamarine
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Vocational, Technical or Trade Scho
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I have a Mercury outboard, 4 stroke, 9.9 hp motor that is about
I have a Mercury outboard, 4 stroke, 9.9 hp motor that is about 4 years old. Recently the motor has begun to stall out after running for about 10 to 15 minutes at full throttle speed. When the motor s… read more
Jason
Jason
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I have a 2007 4 stroke 9.9 mercury , thats smokes when your
I have a 2007 4 stroke 9.9 mercury , thats smokes when your moving and leaning to the port side , and when trolling it will stall if leaned over the slightest . It also smokes on start up when you hav… read more
Charles
Charles
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I have a 9.9 Johnson 4 stroke outboard motor on my pontoon
I have a 9.9 Johnson 4 stroke outboard motor on my pontoon boat. I purchased it used and I believe it is about 5 years old. It is currently stalling out when going to a low throttle and I am unable to… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
22,508 satisfied customers
I have a 9.9 hp Mercury outboard on a pontoon boat. It purs
I have a 9.9 hp Mercury outboard on a pontoon boat. It purs like a kittle in idle at full throttle but when I place in gear at put in full throttle it seems as if it is only running at half speed. Any… read more
Noel Schembri
Noel Schembri
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My 9.9 outboard 4 stroke 2004 Mercury engine has had trouble
My 9.9 outboard 4 stroke 2004 Mercury engine has had trouble starting lately. I have changed the gas in the gas tanks, and changed the two spark plugs. The only way that the engine will keep running i… read more
Jeremy R.
Jeremy R.
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I have a 2005 electric start 9.9 4 stroke Yamaha with remote
I have a 2005 electric start 9.9 4 stroke Yamaha with remote throttle/gearshift. First time out this year today and the engine will start, idle and troll @ idle speed. However, it stalls at the slight… read more
Jeff G.
Jeff G.
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Vocational, Technical or Trade Scho
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My Mercury 9.9 4 Stroke engine will start and run only when
My Mercury 9.9 4 Stroke engine will start and run only when the choke is out. Immediately upon pushing the choke back in, the outboard fails. Is there a carborator I can clean or an air intake that's … read more
orcamarine
orcamarine
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I have a Mercury 9.9 HP, two stroke engine, S/N 09A28078. I
I have a Mercury 9.9 HP, two stroke engine, S/N 09A28078. I installed new plugs, gapped at .037in, fresh gas and oil, 50:1 mix. The engine will start on the second pull and will rev up when not in gea… read more
ROCKET
ROCKET
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Vocational, Technical or Trade Scho
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Gents, I have a 2000 honda bf 75 four stroke...I assume the
Gents, I have a 2000 honda bf 75 four stroke...I assume the idle jets on one of the carbs was clogged for the last few months, it would idle rough, and have difficulty getting to full throttle,but onc… read more
ROCKET
ROCKET
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Vocational, Technical or Trade Scho
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my 2002 Mercury 9.9 4 stroke outboard , will only run ...
my 2002 Mercury 9.9 4 stroke outboard , will only run 2k rpm @ full throttle, idles very rough and dies @ idle, oil level is full , filters are clean . ?????????… read more
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Larry B.
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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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