I currently have a 1448 seaark rivited jon powered by a Merc 25 two stroke. I'm tired of having to replace the prop about every year or so. So now I'm looking into jet outboards (and larger boat). My motor when ran in the unlocked postion will kick up if I hit a log, rock, etc.. Now most of the outboard jets I'm looking at come with power tilt/trim (Merc 60/40). Do these motors kick up when hitting something? Can I run them in an unlocked postion?