Corbin seats have always been a problem releasing from the latch. Corbin makes the latch loop to be too tight.
Some have found that hitting on the center of the passenger seat hard while turning the key to release seemed to help. If not, then have someone else sit down on it, or bounce on it, while attempting to unlatch and then get up while still holding the latch open.
Once the seat is off maybe add a washer or two under the seat latch loop on the bolts.
Some have found that hitting on the center of the passenger seat hard while turning the key to release seemed to help. If not, then have someone else sit down on it, or bounce on it, while attempting to unlatch and then get up while still holding the latch open.
Once the seat is off maybe add a washer or two under the seat latch loop on the bolts.