just looked up the parts list on that one and it appears that it doesnt use a set screw like the merc binnacles...right next to your trim up/down switch you have mounted to your console..there should be a little circle cover you can remove and see if that screw is loose...may be your problem...not 100% sure but thats what it looks like to me..
ImageUploadedByTapatalk1373819226.595032.jpg
The small cover part #1 and screw #54..check for a set screw but it doesnt appear to have one.
Sent from an Apple Tree..