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1989 mercury 25 elect tiller.

Mr. Boyd

New member
eng idles rough.cleaned carb,new plugs, yet at idle, I can pull top plug wire and it will run on one cyl.
pull bottom wire and the will run on one cyl. at idle it sounds like a race car with a hot cam.
over 1700 rpm all the way to max throttle runs perfect. help
help, shade tree.
 
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