Re: Tachometer
Tiny tachs are an inductive pickup type of device just like a timing light. If you happen to run the pickup wire too close to multiple cylinders it can confuse the little bugger. Installed correctly they work fine. Two failures in my view points to incorrect installation. That said, there a couple types of Tiny Tachs. You need one for a four stroke as each cylinder fires once every other rev and a two stroke fires on every revolution.
