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 – 150HP, 155HP, 160HP, 165HP, 170HP, 175HP, 180HP, 185HP, 190HP, 195HP, 200HP, 205HP, 210HP, 215HP, 220HP, 225HP, 230HP, 235HP Johnson/Evinrude 2 Stroke Motors

Price: $