Yes Max,
The hole to fit the bottom half of the crank through is about 80/90mm in diameter. I do all that sort of drilling in my drill press but plasma for that stuff is so much easier. Problem is all this stuff adds up and as you know there is no money in fixing mowers. I need a plasma, a bottle of migshield gas and a bottle of oxy and a bottle of acetylene all ads up and it is hard to justify when I am nearly 80 years old