Hello, need a little help re/installing the shift shaft on this 8hp honda, BACL-1001299, was told it is a 1991 model. It has the shift shaft that has the motor end part that unscrews to slide it down and remove the lower unit, what is the easiest way to get it back together and screwed back on, run the shift shaft up and then try to reach it and screw the part on? thanks for any info.