What a donkey. I guess he destroyed his last few functioning brain cells too, with that overdose. There are warnings on the packets of all dangerous products, but it's amazing the number of people who don't even read them, or just dismiss them. Old Italian farmers using pesticides and other farm chemicals are notorious for not reading the labels.
Re the SR1, they're a good old engine, but the accent is old, now. They're tricky to work on with largely hidden diesel injection plumbing. The injection parts are where the $$'s are, but they last a long time if they haven't been run with dirt in the fuel. Usually, with most old diesel Listers, pulling the head and doing a top overhaul will see them go for a long time yet.
When I was goldmining and re-treating tailings, our partnership bought dozens of new LT1 Lister engines to drive little centrifugal pumps to circulate the cyanide solutions on tailings dams.
They're the smallest of all the Lister engines and run from about 1.5HP to 9HP maximum. You can run them at 3000RPM, but they're pretty noisy at that speed.
We used to run the pump engines at about 2000RPM, they would only put out about 5HP at that speed, but it was plenty for the small pumps.
In the multiple years we owned those LT1's (all through the 1980's), we never put a spanner on a single one of them, even though they ran 24/7 when pumping.
I've got a stack of engines lined up to restore (after all the tractors and trucks and cars!), but the pride of my collection is a Ruston Hornsby 3 cyl VSH engine rated at 34HP at 1500RPM. It is a monster of an engine, it weighs over 700kgs.
It is a 1943 model and was in a powerhouse in a refractory brick plant, but the place was shut down and abandoned, and the thieves got in and stripped anything of value.
The aggravating point here is the thieves stole all the brass ID plates and the exhaust manifold, so I've got some work to bring her back to original condition.