How do I measure Engine Speed?

Go-Rebels

Active Member
Joined
Jul 14, 2019
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Is there a technique to measure engine speed (RPM) on single cylinder engines in general? I don’t want anything permanent; I only want to know if I’m reaching maximum spec’d speed.
 

tom3

Lawn Addict
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Apr 9, 2018
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I bought a little "laser" tachometer from Harbor Freight for about $20 or so, works fine for stuff like this. Uses an LED that you shine on a rotating piece with a small strip of shiny foil or tape on it to give it a pulse to measure.
 
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