Got this motor running over the weekend. It would run real rough for 6 or seven minutes then run pretty well after it warmed up. When I pulled the plugs the top plug was dirty and the bottom clean. I suspected water in the lower cylinder. i started the motor with the bottom plug removed and a fine mist of water came out. Is this a blown head gasket? How serious is this? Could it be something else? Maybe I missed something when I replaced the impellar. Is there something I should spray in the cylider in the meantime to prevent further damage while I figure out what ot do? Oh yea, compression is 100 on the top and 85 on the bottom. To me it sounds like I am screwed. All suggestions welcome.