I have a really sticky propane valve. Its a projet solenoid valve. Last week I logged about 14 flights on my jet and all but one had an automatic start. The valve froze and I had to do manual propane injection. Needless to say, I got good practice in manual starts, but its something I would rather live without.

I know sticky valves are kinda common. How do you guys unstick these? I have shot in silicon lube, but no luck yet.