You have a 63/64 built by Scott/McCulloch.<br />7.5 hp @ 4,500 rpm 10 cu. in. point gap .020<br /> plug gap .035. 50:1 fuel mix.<br /> For parts try the Scott guy at web.a-znet.com/~<br />scottguy. also Laings outboards at:<br /> www.laingsoutboards.com.