While changing the engine oil at its scheduled interval, while first draining I heard something hit the bottom of the oil bucket, which I thought it was the drain plug washer and immediately fetched out and discovered it was a gear tooth. A small beveled gear tooth.
What would cause an engine internal gear tooth to break and how concerned should I be. If it is metal fatigue, what would cause fatigue to an engine that operates less the 2500 RPMs. What would cause gears to miss mesh?
I do not know how long the gear tooth has been sitting on the bottom of the oil pan, but it is less than 100 hours since last oil change. The tractor continues to run fine. Any thoughts?
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4110 Engine Gear Tooth 
Linear Mode
