Hello, all I have acquired my first boat a 1976 Glastron T179 with a aq130c and a 270 outdrive. My question is: When should the outdrive be locked vs unlocked. The prior owner has the pin in the hole closest to the hull. On land I can't seem to get it to lock ever. when in the water going into reverse the outdrive lifts up. If I can get some direction to where a post I can read answers or get and answer on this that would be great. Thanks!