I leaned out my K-Jet by twisting the "CO adjustment" to the left about a 1/4 turn. It ran great until recently, when I started to notice a gas smell at idle.

Turns out the auxair valve and control pressure regulator relay had an iffy ground. The engine stayed on full rich. I screwed it down to the mounting plate and all is well.

Apparently the engine runs well enough under the typically light loads I apply to it at a pretty lean condition, and even with full "choke" on, it ran acceptably, in fact, really well at very high speeds.

Is there a reasonably priced high-pressure control-pressure-regulator setup I could install, along with an exhaust gas temp sensor I could install in the EGR port?