Small Engine Hour Meter 

Spend a little cash get a small engine hour meter and get more sevice life out of all your small engine machinery, chain saws, lawnmowers, leaf blowers any one cylinder engine application. Hour meters for small engines are easy to install, no special tools required and will pay back dividends, ideal for small portable generators such as the Yamaha Ef200IS or any portable one cylinder small generator 2 0r 4 cycle.

(1)  Allows you  keep track of how long you  can run on a tank of gas
(2) Log the number of hours to track oil changes and maintenance 

No tools, easy to install, one wire to a good clean ground, the other wire connects to the spark plug
mount on your engine and your done.