Re: 25 hp mercury bigfoot vibrates and shakes at idle
hwindle,
I drilled out the plug and sure enough found the air adjustment jet. Turned 1 turn out and she is finally purring like a kitten. It amazes me that a dealer would not have found this problem or known about it.
Good luck and...
My engine ran very smooth until this year and starting getting excessive vibration at idle. Mechanic cleaned the carb but I am still not happy with performance. My carb does not appear to have an idle mixture adjustment. Any thoughts?
