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- 8 Sep 2015
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I habe a Mountfield SV150 mower on which I have recently cleaned up the Carb and spark plugs. The engine runs well but it revs high and low continually. I notice that the arm on the side of the mower swings back and forth as it revs. pic 1. I have seen similar mowers on the Web and they all have a governor flap which appears to be missing on my mower. Is it a missing part or does something else do the same job? All help gratefully received.