Small Engines - » Basic Tractor wiring diagram For example, the new garden tractors that have and electic PTO and a mow in reverse bypass switch. This setup requires the safety wiring system to run through the PTO switch and the introduction of a relay or two to allow the tractor to move backwards without killing the mowing deck or the engine. The thing in the middle is the Ignition Swtich. How to test and repair ignition system problems? | Briggs The ignition system is the starting system for your small engine. Whether you start the engine with a pull rope or the turn of a key on an electric start motor, you're relying on the ignition system to produce a spark inside the combustion chamber. Where is my small engine wiring diagram? | Briggs & Stratton Briggs & Stratton sells electrical components only for engines. If you are replacing or rebuilding parts of the small engine on your lawn mower, snow blower or other outdoor power equipment, the basic schematics or wiring diagrams of our alternator systems are available in our guides below: How To Wire A Kill Switch On A Small Engine - YouTube Small Engine Repair: How to test the Ignition Switch or Kill Switch on a Honda GC 190 - Duration: 7:13. smallengineshop 159,305 views. 7:13. I Bought a $1,400 RANGE ROVER at Auction with MYSTERY Mechanical Damage SIGHT UNSEEN! - Duration: 21:54. Samcrac Recommended for you.