I have a 1975 ish Mercury 115. They lowered the lake level quite a bit, so as I was cruising @ just under 30 mph the motor popped up, revved up and I quickly shut it down. found myself in soft mud. Pushed the boat out, started it and we started to move. Gave it more throttle, engine revved up fine, but didn't move any faster. I'd say we where doing lawnmower speed. Took some time, but we did make it home the 4 miles. Prop looked fine, didn't see any exterior damage. So what damage did I do? Can I fix it myself cause I can easily see my self doing this again? Someplace I can download a PDF file of the lower unit? I can find my way around tools quite well. As a mechanic I'ld rate myself as a 6 out of 10. PS - I wasn't the only one hitting the mud.