The I-90 turf cup kit attaches to the top of the rotors riser assembly.

First you will need to gain access below the rubber cover, removing the phillips head screw will allow for this.

Remove phillips screw.

After the cover is exposed it's as simple as installing the new turf cup.

Make all necessary arc setting adjustments prior to installing the turf cup.  Future arc setting changes will required removal of the turf cup.

Screw the phillips screw tightly.

Once the turf cup is installed on the rotor's top you can now slide the rubber cover over the whole head.

The I-90 is now ready for turf to be installed into it's new addition.