Jet kits come with all the hardware you need to convert your motor to a jet.  (You will need to use the water pump off of your existing lower unit.)

Notes about this kit:

Length (inches) from housing mounting face to end of driveshaft. Must match propeller gearbox within 1/8″. (Motor driveshaft length increased 7/16″ in 1992. DO NOT USE OLDER MODEL R JET DRIVES ON 1992 MOTORS!)

Med Jet Kit

For use on – 85HP, 90HP, 95HP, 100HP, 105HP, 110HP, 115HP Johnson/Evinrude 2 Stroke Motors

Price: $2486