Took my new to me 1980 15hp johnson out on the lake,had brought a 2008 8hp 2 stroke yamaha as a spare,,,murphys law,if something gonna go wrong it will,,,15 hp snuffed out,so whopdidoo put the 8 on and away I went,,,,8 hp died also,rowed 3 hrs to get back to base,,my guess is I forgot to put oil...