With no gearcase or propeller extending underneath the hull, a jet travel means that you can maneuver about or pass over obstructions that would Restrict the journey of a traditional, propped outboard. On the lookout for an out of date portion number on your vintage motor? Have a look at https://yamaha-70-hp-outboard-eng74836.scrappingwiki.com/831227/the_ultimate_guide_to_20_inch_boat_engines_for_sale