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Hello. I am diagnosing a Stihl ms 181C. The saw starts, goes to higher revs, which then drop and normalize. Then, as the engine warms up, the revs drop and are unstable. After pressing the gas, the engine revs up to dangerously high revs. Which would mean that it is running on a lean mixture. The white spark plug electrode confirms these assumptions. I invite you to watch the review material. Best regards and I encourage you to subscribe to the channel. #RPGarage, #StihlMs181Leak, #PiłaSpalinowaDiagnostyka,