Here's a how-to.
tl/dnr:
Best A/F ratio at idle is 13.5--14:1
WOT 12.8-13.2:1
Cruise and mid should be in those ranges; a little richer when stomping on it but not below 12, and generally in the 14:1 range when steady-state.
As stan says, you're probably super-rich. Like 10, even 9-ish, which is wrong and stupid and it won't "run cooler" like that either, despite what a plurality of "experts" claim. Just wasting gas, leaving power and throttle response on the table and probably hurting the engine a little too.
I've got the same chore high on my agenda.