Re: 1969 mercruiser idleing
It is possible that you have a vacuum leak if any of the gaskets were in bad shape when you put the carb back together. To set the idle mixture screws you can try turning the idle mixture screws out a little to see if you can get it to idle. You want to set the idle mixture screws to maximum rpm. Keep turning the idle speed screw down to maintain 700RPM or so as you alternate back and forth adjusting the 2 idle mixture screws to get best smooth RPM. Once you have the best idle, you can turn both idle mixture screws in 1/4 of a turn so the idle mixture isn't too rich. Readjust the idle speed to 700RPM.