As a non-Jetcat owner, I'm curious as to why Jetcats produce a clicking sound during startup propane ignition?

The propane/kero burner valve is pulsed for the proper amount of fuel.

I thought it was the solenoid valve pulsing. Propane valve to be more specific. You won't hear it on my airplanes, as there is no propane solenoid valves installed.

Yes, That's what I said Sean