Sorry again for the snafu Bondy
To start you'll just put the throttle in the choke/start position as normal and then by the power of electrickery turn the key instead of pulling a rope
To stop the engine, push the throttle to the stop position as normal (once this is fixed)
The magneto wire grounds the magneto to stop the engine. With the throttle in anything but the full stop position the ground is removed and your good to go.
Any silicone sealant will do I think. Ordinary roof and gutter or something. Just not that muck that they claim you can use underwater.
Cheers,
