I bought this motor at the flea market for $21 it ran but not well. Turned out the carb was filled with junk. Its running alot better now. I had the lover end apart beacuse i saw it wasnt peeing. I was later told its not your normal water cooled enigine it just cools the exhaust? Well anyways i checked the impeller and it is a little beat up. I put just the lower end of the motor in water and hooked a drill up to the drive shaft. The water was coming up the "tube" (whatever it may be called) so i magine thats not the problem for no water coming out with the exhaust. Can these motors run for long periods of time without the impeller working ... im guessing not. Also it does not seem to get as high in rpms as it should i messed with the bottom jet on the carb and got it a little higher rpm but not much. Also rtv sealent was used for a gasket is that ok or should cut my own gaskets?