GENUINE ECHO PET-4000 Pulse Ignition Checker & KV Tester Oppama OEM New Tool Part # 99051130023 Genuine Echo / Shindaiwa Service Tool The Oppama PET-4000 Pulse ignition checker and KV Tester Not only checks for spark, but has a fine adjustment to test for spark at the correct firing voltages Each 1mm graduation on the adjustable gap represents approximately 2,000 volts in firing voltage Can check for spark between 2KV and 25KV with ease Checks spark while running, or not running Aids in diagnosing the difficult to detect "wont fire when hot" and other coil related problems that ordinary spark testers just can't manage. Required special service tool for all Echo and Shindaiwa shops!!!