Electronic Specialties 325 EZ-Tach Digital Automotive Tachometer

I bought this unit to adjust the idle/maximum RPM on various outdoor power equipment with small engines. When I connected it up to a snow blower, the readings were very erratic. I decided to try the unit on my car. It worked fine in that application, displaying the same value as the tachometer on the dash.

On the package, there's a sticker saying Automotive Use Only and that Model 321 should be used for small engines. I wish that information was prominently displayed in the online description. The description says 'any automotive engine with a spark plug wire' which I interpreted as any 4 cycle gasoline powered engine.

BTW, the model 321 is 3 times the price.

I used this to provide RPM data while rejetting and fine tuning the carburetors on my motorcycle. It worked well and seems to have a decent build quality. Make sure to clamp the tool on the plug wire in the right direction, know if you are testing a two or four stroke engine, and know something about how many spark pulses are sent per engine cycle.

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Works as advertised and performed its function just like I had hoped it would. I needed to verify the RPMs on my V Twin motorcycle.

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It works okay but it is hard to read the display when it is buried in the engine to get to the plug wires. If it had a lead and then the pick-up would work better.

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I am very satisfied with this product, I repair small engines and this unit does exactly what I need it to do.

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