Do they work on Mag engines?? The Quadra looks like maybe it could use a carb kit and then a tune up so it will idle down. Maybe even go through the linkage and tighten it up so the throttle closes all the way.
Mig, the Quadra is still used quite a bit, I saw a lot of them at IMAA events. There are a lot of people in the gas engine forum still using them that can be of help. I still use Zinoah engines with mags. I really do like them as well as electronic ignitions. I even like spring starters on gassers too. There are tons of threads about Zinoah in the gas forum too.[8D]