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Message: <blockquote data-quote="Tazza" data-source="post: 1671" data-attributes="member: 82">My 743 blew quite a bit of black smoke at startup when i had crook plugs, it took alot of work to get it to start and run. With new plugs, glowed long enough blew almost no smoke at startup. It was over fueling and took a few seconds to burn off the excess fuel. I really should look for a glow plug cycling circuit to attach to mine, it takes a good 30-60 second glow to give me instant start. Too short and it starts then conks out.....I don't dare do a compression test, i don't want bad news.....</blockquote>