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Message: <blockquote data-quote="CASE 1840 " data-source="post: 43886" data-attributes="member: 5666">I'm guessing this is the cast iron overhead valve engine correct?  If so and it has electronic ignition, they are very sensitive to the gap between the flywheel pins and the sensor.Tec is still in business making compressors / gearboxes and a couple of other things, they just got rid of the small engine business. There is a company that took over parts support but even when Tec was making engines, the cast iron line was decades obsolete.I did see where someone used automotive crank position sensors as a ignition trigger and a GM module for spark control.  They had 2 sensors to provide ignition retard during cranking to save the starter.</blockquote>