I just got a new/used boat with a kicker and went to change the impeller, when I dropped the lower unit the shift rod came up and out of the prop shaft mechanism. It's a 90 Mariner 8hp outboard. It looks like it has a wedge shaped step piece that screws onto the end of the shift rod that fits into the prop shaft/shift mechanism in the lower unit. Is there a way to get this back into position without taking apart the lower unit.