Re: lower unit
JJ..... If your 15hp is an older model (1956 etc), there is a plate on the side of the exhaust housing (the hsg between the powerhead and the lower unit). Remove that plate. You'll see a brass shift linkage which connects the upper and lower shift rod with two 3/8" hex head bolts. Remove only one of those bolts.<br /><br />If your 15hp is from 1974 up, dropping the lower unit will allow you to see that shift connector at the very front of the unit.