Ok its making 126psi. Thats good. I also filled it up with the right oil. I decarbonized the whole engine and it now moves and gets up to about 15 mph but if I open the throttle it bogs and stumbles. Does my fa50 have a CDI ignition, cuz that would rule out timing probs right? I'm almost certain its the carb, either too much or not enough fuel. Anyone know anything about the auto fuel switch, is it vacuum operated? I've also cleaned the carb out thoroughly, but maybe theres just one little spec stuck up in there.