The Yamaha Ignitor with Snap-In Plug is a vital part of the ignition system. There are three parts total. This unit is responsible for timing the spark. It does this with the help of the pulsar coil that is on the flywheel. This assembly sends a signal to the ignitor every time the flywheel makes a full rotation. When that happens, the ignitor collapses the spark created by the third part of the system, known as the coil. If any of these three items malfunctions, the entire system fails. If you are having issues with one of these items, chances are the others will be right behind it. They all evenly wear because of the nature of the item. Typically the coil goes out first if that is helpful.This golf cart ignitor is a five-pin. There is a G9 out there that uses a six-pin, so make sure you check before ordering. There is nothing worse than getting the Yamaha part you think you need, and it won't plugin. Call an expert at Buggies Unlimited for assistance.