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  1. G

    Motor Revs Down On Its Own

    Found excessive gunk in the right fuel tank. I mowed the lawn twice since I cleaned out both fuel tanks. Normally it would rev down 10 or so times over the course of a three-hour mowing. After cleaning the tanks, it revved down once or twice. So..., much, much better but not perfect. I also...
  2. G

    Motor Revs Down On Its Own

    Thanks guys. Sounds like good advice. My fuel tanks are almost empty. I'm going to check for gunk in the tanks and all of the items that Seville mentioned. I did replace the fuel filter in April of 2022 and I want to bleed it again to make sure all of the air is out of the lines. Also, I...
  3. G

    Motor Revs Down On Its Own

    Seville, The rpms usually come back on their own, but it then happens again a few minutes later. If I shut it down and restart it, it runs normal for a few minutes, but it happens again.
  4. G

    Motor Revs Down On Its Own

    I have a Lastec 3372 lawn mower that will be mowing along at let's say hypothetically 4000 RPMs, when suddenly the engine will drop down to possibly 2000 RPMs or less. I must quickly disengage the mower deck and hydraulic mower arms or the engine will stop. I cleaned out the excess buildup of...
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