I've searched previous posts and came up with 0 so forgive me if this has been asked before. I have a motor that's still pretty cherry. I had the boat in the water this weekend and must have sucked some muck up into the impeller, I had the tell-tale stream when I first put it in the water then it was gone after going through weeds. I would like to check the impeller assembly but cannot remove the lower unit. I took out the four bolts, then removed the trip tab and nut. The unit dropped down a few inches but will still not come out, I'm just not sure what else I must undo before the lower unit will drop out completely. HELP PLEASE and THANK-YOU!