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:

Tiller requires use of gate shift assembly #1263 short shaft, #1264 long shaft.

Specify 18 or 20 teeth on the driveshaft.

Lg Jet Kit

For use on – 75HP, 80HP, 85HP, 90HP, 95HP, 100HP, 105HP, 110HP, 115HP Mercury/Mariner 4 Stroke Motors

Price: $2633