I am wanting to convert my 20 hp Johnson tiller (20r72r). To a electric start. Do you guys know where would be the best place to purchase this kit. I have a guy here that tells me he can sell me the starter, mounting bracket, solenoid, and necessary wiring and push button start button for 250 with some of the parts used or 500 new. I do not want to pay $500 but is 250 a good deal??? Any suggestions on how to make this cheaper or should I buy all the parts seperatly??