No, mine is really smooth, but then if you do idle these down below the spec rpm, they will shake being an odd cylinder engine. Being iso mounted vs a true tractor(farm tractor/compact tractor) frame, the shake is worse. Another forum wants a running and driving video, which I will try to take tomorrow or this weekend. I will post it here as well, with her in idle position. I think many guys try to idle these to slow, a triple cylinder sounds like its turning faster than a single or twin cylinder gas due to the third cylinder.
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