Well guys, not so good. Decided to go with head from other mower. Took off, cleaned what carbon I could (wasn't to bad) and put back on. Started and seem to run okay. Tried to start 15 minutes later, would turn but not hit. Took off air filter, sprayed a little starter fluid in card (left air filter off) and tried to start, started right up, but, when I lifted cover of mower, oil was shooting into breather through what I think is an exhaust hose (goes to engine). Immediately turned off but oil had covered everything plus you can see oil in bottom of carb. Is this something I done or did something just break in motor. Either way looks like a rebuild, any idea on cost?