Just put this out there to see if it was any of your handy work
Had a spare day up my sleeve as I'm waiting for parts again ....US postage is a bit slow of late, So proceeded to pull a few motors down to see what the internals where like
This one in particular I removed the oil drain plug and found grease WTF going on here ( this will be interesing )
And this is what I found inside
1 and a 1/2 tubes of grease. Must have pumped it up thru oil drain hole. To my amazement there was no spline or gear damge apart from a burn mark on a seletor.
OK who owned this before me -----TM 250 1973 motor.
Mainline, your safe there was no saw dust to be found
Top of picture is 1 half of case with gears still in place , bottom is other side. When pull apart it some ended up on crank.