Tachometer for 91 blaster?

I have a cheap one from ebay and it works. The rpms are not really accurate though. I mainly wanted it for the hour meter. All you have to do is wrap the wire around your spark plug wire and it works.
 
I run one myself. I mounted it with a strip of "Velcro" for easy removal. No need for drilling or screws. Works good,and looks like this...
7381-my-handy-dandy-hour-meter.jpg