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I've been repairing small engines, as needed around the house, for about 35 years, and this time I'm about stumped. The mower I'm working on is an MTD Yard Machines, Model 126-238M062 90174. It has a Briggs & Stratton Engine, Model 128802-0829-01. I got it working last week after cleaning the...

I just pulled apart my old LawnBoy 2-cycle mower engine. The needle bearings had come loose and were scattered inside the engine. Not too much visible damage, except... Here's my problem: One of the needle bearings punched into the edge of the piston on the combustion side. It broke the piston...