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Vibratach Tool Designed To Read The RPM's On Engines
Precise Engine Repair, 151 Roberts Rd., Yakima, Wash. 98908; www.perr.com: This company offers the Vibratach, a tool designed to read the rpm's on all engines and other rotating equipment.
  You hold the unit against the engine housing while the engine is running and then turn the center dial until a vibrating wire reaches its maximum side-to-side movement. Then you read the dial to get your rpm's. If the engine low idle or high idle is not in line with the engine manufacturer's specifications, you can use the tool to make precise adjustments. Works with lawn mowers, go karts, electric motors, motorcycle engines - anything that creates rpm's.

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2006 - Volume #30, Issue #4