Replacement part for the TFL P1 Outdrive & Scale Outboard unit.IMPORTANT! : You must remove the hidden grub screw in order to release the prop shaft. See picture. 10T Tapered Straight Gear A See red lined arrow in the picture for the part this replaces. Includes: (1) B42515-04 Note:Picture of diagram is for reference only. This is only one part of the drive.