Finally got the new Mixture Meter installed; gave up on getting the 14Point7 system working. I think the 14Point7 had an internal wiring problem. The new unit is an Innovate MTX-L; features a 2-1/16" round gauge with a digital and a LED dial, cables with molded connectors already wired, carbon steel welding bung, and a heated O2 sensor all for $168 (Amazon - new). Only wiring needed is power and ground. Company literature says should get 100 to 200 hours on the sensor burning 100LL; time will tell. Ran out of other things to fix or tweak. If this Mixture Meter works as advertised, then flight will follow on the next "perfect day".
Sid Wood Tri-gear KR-2 N6242 Mechanicsville, MD, USA
