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Message: <blockquote data-quote="frogfarmer" data-source="post: 38110" data-attributes="member: 4075"><p>That machine should not have any notable smoke. It may puff at start up but that would be about it. With a miss you are defenitely sending out raw fuel and a fair amount of smoke. Low compression could be a cause but it would likely be hard to start at times. I would check the valve clearance at the rocker arms. Valves that are too tight can also cause the problem. And as a long shot the governor in the injection pump could be sticking or have a broken spring causing an over-fuel condition that fouls a cylinder on startup. I would start with the valves.</p></blockquote><p></p>