While strobing up my GP today I had cause to be kneeling down near the tank/toolbox area where I have th SIP Speedo control box mounted.
After turning the engin off I could here a sound, faint but a bit like a sort of warbling squeaking like gas escaping from a not quite tightened lid on a bottle of fizzy juice, if you can imagine. It's coming from the control box and when Inflick the battery isolator switch it stops - anyone else ever observed anything like this?
SIP Black Box Noise
I've got a spare sip black box if you should require one. Price of postage only.