TFL lower unit parts for the TFL scale outboard pn# tfl-b54210 See the picture for the part this replaces. Includes:(1) tfl-b54210-09 and the gears and parts inside of it. Specs: Drive shaft: 4mm; requires drive-dog-style propellers. and fits up to 48mm prop. Note:This is only the lower end. IMPORTANT NOTE - To loosen the prop shaft, see picture 2Click here to download PDF of the entire parts diagram.Click here to download PDF of gear and outboard maintenance sheet.Maintenance Video.