Quote Originally Posted by geezer101 View Post
You 'can' tap and plug it but it's more of a safeguard to prevent coolant from backlogging under the carb base. The vast majority of the time nobody seals the coolant port up. Try adjusting the mixture screw first, then adjusting the idle speed screw.
Thanks, Geezer.

I have it running pretty well at 1 1/2 turns out on the mixture screw and about 1 1/2 turns in on the idle speed screw.

The carb came with 55 primary/ 50 secondary idle jets. Timing is at 8 degrees.

I'm getting smoking from the exhaust and sooty black plugs from stationary idling and revving.

1. Should I be looking at idle jets? I have a Redline jet kit with 55s, 60s and 65s.

2. Should I be looking at float height?

Any suggestions would be appreciated.