Hi guys, looking for a little help. I have a 87 50go on my bayliner bass boat and I need to replace the water pump. I took off the 4 bolts around the power unit but I can't figure out how to unhook the shift linkage. I loosened the 4 hex bolts around what I assume is the coupler but it drops about a 1/4 in. And won't go any further. Do I have to remove the outer cover above the lower unit?. Any help would be great. Thanks