Chainsaw Repair

Over the years I've put some together and oil the cylinder and bearings well at assembly. It took a while to get all the motor oil out of the engine & muffler. I recently did a Stihl 025. I had run it a little around the shop to adjust the carb. My 40 year old son got a hold of it and started some buried cuts and it was smoke city until the oil got burned out of the muffler.