An on tractor tach? or something to just check revs in the shop? I still use a Vibrometer to check governed engines when I work on them, I like the Digitrons for on the track. You can record exhaust temp, rpm , head temp, and wheel speed if you want and play it back.
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scan in the QR code (upper left) or text IHCC to 51660 to follow which shows and pulls we will be attending.
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