I have an 86 Mercury 9.9 that needs an impeller. I have replaced them before in my other motors, but they all seem a little differnt with locations of bolt and such. Where will I disconnect the shift linkage and how many bolts are in the lower unit holding it on? One more question, Where is the vent hole for filling the lower with gear lube? I found the drain/fill, but cant seem to find the upper fill level/vent plug.
