ok guys give your input i took the river boat out for a few hr this evening to see if i had all the holes welded up while running back to the truck the 15hp johnson started loosing power and stalled she never locked up and wouldnt start back after getting home it had cooled down and started but smoked bad checked compression it very low first thought head gasket it was fine so i went a little deaper to find pistons are scorched and broke rings i bought this thing in 95 doesnt have 100 hrs on it i ran the oil that it was broken in on quicksilver but it failed any suggestions