Originally Posted By: benjamming
Originally Posted By: daman
yea i know but hard to find for a small engine. $$ if you do find one.
Just get an hour meter. Most of them show rpms while running. They are usually ~ $40. They are available for spark plug (induction) type, vibration, etc.
B&S makes them. They're all over EBay, and I have one on my Yamaha Generator. They flash every 50hrs I think for oil changes, and are really easy to hook up. As I recall, just a ground wire and an induction wire wrapped around the spark plug lead.