Thank you both.
I enjoyed manufacturing the worn hydraulic parts of my John Deere 955 utility tractor – it was made by Yanmar, under license to John Deere. Lovely piece of kit.
Before that, I returned a 1976 Roper garden tractor back to working life, for a family member living in France. The Briggs and Stratton twin cylinder motor needed me to engineer some crank bearing parts. Its still working to this day.
I now have thoughts of a steam engine to power a small launch (big bigger than a rowing boat). But thats for another day.