HORNSBY Sumpoilers Sumpoilers Sumpoilers Sumpoilers 2YWA MK2 Engine No. 1 Engine No. 2 Engine No. 3 Engine No. 4 333419 33367 34576 497984 115 HP 115 HP 66 HP 14.5HP LISTER Model: 2YWA MK2 Number: 2YB 20911D 497 984 3603 3 . . . .