This adapter is great for adjusting the carburetor on my ATV that doesn't have a tachometer. I have a Fluke 87-III, not a 78 or 88 as the description says. All you have to do is set the multimeter to Vdc and it works great. I tested it on my car first just to be sure and it matched the tachometer on the dash perfectly. Remember, if you're running a 2-stroke like me, you'll need to divide the displayed RPM by 2 to get the engine's actual RPM, as the spark plug fires at every revolution.
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