OS has a couple of fuel injected(throttle body) engines now. Controller runs solenoid valve(crank pressure) and monitors rpm and temp. http://www.osengines.com/engines/osmg0680.html > If you want high endurance you need a spark or a direct injected > diesel. The latter is not available in model sizes (yet). Michiana R/C Choppers http://www.mrcc.info Mike DeMetz N9GEZ Elkhart, IN mailto:n9gez@qsl.net http://www.elkhart.net/~miked -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics