"Has anyone had success putting a large blade area low pitch type prop. on one of these, for to push a 23' lightweight 1.3ton yacht? Say a British Seagull 4 blader, 38 square inch area? Does anyone have a service manual they would be ok to pdf and email to me (firstname.lastname@example.org) ? Having trouble separating the gear unit from the column - it is stuck in gear. many thanks. Rob"