How can i can i convert my electric start generator to startomatic ?

it also has electric 'off' switch ' but am not keen to run a remote cables for 50 m. actually it's really only the 'off' function that i need. would some kind of remote control/liketv doodah work ? the starter and fuel cutoff solenoid are 12 volt. any help would be gratefully received .please bear in mind that i'm quite good at twisting wires together/insulation tape but not electrically minded .