Hum, must be possible to avoid this with a relay I would have thought.

BFO switch still does the starter current but feed to ignition switch is
via the NO contacts of a relay that is fed from the switched side of the
battery. If the current rating required for the relay for all the ignition
switch circuits just put the solenoid feed through the relay. Hum couple
of snags:

1) the ignition load might still be enough to blowen fusen.

2) If 1) didn't happen you'd wonder why everything was "alive" but no
starter! Ah, simple cure for that, put a buzzer on the NC contacts.  B-)

I have them on all my motors.
To get past the perm live issue (e.g. for stereos) you just need to
bypass the cutoff switch with a small wire. Put something like a 10A
fuse in it in an in-line connector. This will leave a permenant feed.
If you forget to put the switch in or someone else tries to start it
the fuse will blow.
Its also not as obvious to the thief that you have a cut off switch
too then.

Or you can just cut the HT feed to the starter and not the feed to the
fusebox/everything else.

"Alex"  wroteafter
"Bob Hobden" asked after

Excellent. Thank you, just the job. They would have to rewire it to get it
going.