Engine Seized - Please Help

[dentheman]

My guess would be that it is repairable if you are mechanically inclined, using the parts manual and maintenance manual on this forum. I imagine a shop would charge a pretty penny to fix it. If you do repair it, check to be sure no bits and pieces went into the oil pump. As far as sludge on the sight glass, I am trying to think what would cause sludge in the oil besides water. Even gas getting into oil will just thin it, I believe. Could moisture from the air box be running down the breather tube?