110 hp mercury runs rough high rpm

A

allenprimo913

Seaman
Joined
Dec 27, 2008
Messages
63
hello,

i have a 110 hp 1966 inline that runs rough if rev at high speed, but at idle it runs smooth and idle good but when you accelerate it doesnt response right.

starts everytime, i not sure exactly what suppose to be the adjustment for the carbs, i have the 3 side carbs and adjusted at 3 turns each. relpaced with new plugs too.

what could be the problem? help:confused:

thnks
 
daveswaves

daveswaves

Ensign
Joined
Mar 22, 2002
Messages
901
Re: 110 hp mercury runs rough high rpm

allenprimo913 said:
hello,

i have a 110 hp 1966 inline that runs rough if rev at high speed, but at idle it runs smooth and idle good but when you accelerate it doesnt response right.

starts everytime, i not sure exactly what suppose to be the adjustment for the carbs, i have the 3 side carbs and adjusted at 3 turns each. relpaced with new plugs too.

what could be the problem? help:confused:

thnks
Click to expand...

Since you are having trouble getting this question answered lets try and get some help. You say it runs rough if you rev at high speed. What do you mean by rough? What RPM do you consider high speed? Does it gradually die out, does it cough or spit when you accelerate?
You have adjusted the carbs 3 turns each, if that is 3 turns out from lightly closed then you are probably still too lean.
Without information from you folks can,t answer your question. This will bump your question to the top again, if you add more information you will likely get an answer.:)
 
G

gator1959

Cadet
Joined
Apr 26, 2009
Messages
18
Re: 110 hp mercury runs rough high rpm

don't just isolate the problem to carbs,sounds like it could be a rectifier or electrical issue if it only craps out at high rpm/s
 
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