B'ski,
I've sold the bulk choke cale w/casinig and 100' would have too much friction to work unless the run was very, very straight. The wire is just to small for a long run.(more than 10')
Try the junkyard visit and pick up a manual thermostatic choke and a doorlock solenoid. I think you will find manual choke way to slow to release even next to the muffler but the doorlock solenoid to be super simple to rig up with a double pole-double throw switch used to reverse the current on the solenoid. Instant on-off for the choke and a simple push button for the starter. I would add a kill switch as well though. 12 gauge wire would be fine for a 100' run. BTW keep a product called Seafoam in your fuel---you will never have a fuel related problem if you do, about 1oz Seafoam per gallon.