2005 Mercury XR6 150 SN 1B191100. Well I went to change my lower unit oil this morning and nothing at all drained out. It was bone dry! Tried to turn the prop and it wouldn't budge but finally got it to turn by hand although it's pretty hard to turn. When turning I can hear the gears grinding but I haven't put new fluid in it yet. I plan on putting the new fluid in, cranking it and putting it in gear in the driveway. Then I'm gonna drain it and see how many metal shavings come out. I don't have any place where I store the boat that shows any signs of it leaking, no oil on the ground etc. that would indicate a leak. Also it was shifting and running fine last trip out in it a few weeks ago. What are the chances it could be saved? If indeed it is bad what are my options? May be time to just get a new mercury 150hp motor. If it does come down to it can anyone recommend a good place in the Dallas Fort Worth area that will repower it with a brand new engine?... Thanks in advance.