The Mercedes throttle position sensor I was going to use as a PWM throttle didn´t work out, it had a too narrow resistance width so I had to take it apart with the hack saw and modify it so I could couple a regular potentiometer to it. Works like a charm but not very fancy, I will make a water tight casing around it later.
After that I fitted the ignition system to the box and wired it up, so now I have both spark and propane solenoid activation when I push the preheat button.
Only some adjustment of the Hobbs safety pressure switches to do and heat shielding the bundle of cables before I can plan for a start attempt!
Cheers!
/Anders