Avionics Bus

[N395V]

for an avionics/starter safety interlock

Does this mean that if for some reason you had to restart in flight you wuld have to turn off all the avionics/EFIS etc. Or are you planning a 2nd battery with an avionics bus?

[fodrv7]

Oooh!
A lateral thinker.

[Mel]

Yes, that is one consideration of having the starter wired through the avionics master. But, how often do you need to "restart" during flight. If the engine stops during flight, it stopped for a reason. The prop will continue to windmill, so the starter is not needed. If the prop stops, you have a real problem and the starter probably isn't going to help anyway. If you think this will be a problem in your case then I recommend that you not do it. For me it's been working for 13 years.
Mel...DAR

[szicree]

EFIS? I ain't got no stinkin' EFIS. Switch off the avionics, hit the start button, avionics back on. No big deal. Besides, if you restart without turning off the radios and such, isn't there a chance you'll toast them?