It was the beginning of a run of 14 years of fine engines, Bill.<br /><br />It was discontinued after 1963 to make room for the 9.5hp MQ series that fit on "under 10hp" lakes.<br /><br />Not particularly rare. There are probably thousands still in regular service.<br /><br />It uses Champion J4C plugs gapped at .030" to .040" and the points are set at .020".<br /><br />Use a 24:1 mix for fuel; unleaded regular and TC-W3 outboard oil.<br /><br />Good luck.
