Hum, Is the Yam 140 the same engine as a 115. I thought my engine HPed up to 130 max. I guess I need to know the year and model number, I will ask anyway.
The other options are:
1/ Re-weld (would get it up and moving, lowest cost, weld may fail again)
2/ Buy new case, I have one sourced at 20% discount, transfer internals
3/ Buy new box (however seems a waste as my internals are good)
4/ Buy a scrap engine and nick the part (Hard to locate a match)
I will keep looking