Hey guys. Didn't know it at first but mice had built a nest in the engine on my Simplicity 728. It hadn't been ran in a week so there pretty fast. Anyway yesterday I go to mow and after 20-25 minutes I noticed the engine started to get hot and lose power so I shut it off right away and removed the blower housing and found a big ol' mouse nest made of grass and insulation. I cleaned it out, let the engine cool, and checked the oil (Havoline 10W-30) and it was still full. I fired it back up and finished up and did some more and all seems well. Do you think it did any damage to the engine? Its an Briggs 8hp I/C and I have Marvel Mystery Oil in the gas and oil.