I tried everything to stop that grass deck clutch slipping, eventually we gave up and just usedd it for trailer work, but I had the drive coming from the flywheel bolts, which was a mistake, as I had replaced them with long allen bolts, and they always came loose eventually. In this incarnation, the drive comes from the flywheel where a plate is bolted in place of the clutch cover. Onward and upward, the 2cv engine is 29HP.