Well I made my first "rookie" mistake yesterday. I was cruising the lake, a damed lake that had been lowered, when I saw a marker and "ASSUMED" it was a "no" wake marker because it was about 100 feet from a marina area. Well it was a "Shoal" marker and needless to say I scraped the bottom of the I/O on the rock. It was a brief rubbing on the rock. After the incident I jumped in and checked the prop and surrounding area, and there are a few scratches on the base of the motor and the prop blades have a few rough edges. The bottom of the boat does not seem to have rubbed. It appears that the most damaged, which is still minor, is on the metal bottom of the motor that extends below the prop(I am sure this has a name). Anyways, I used the boat the rest of the day and did not notice any difference in the boats performance. My question is : What else should I look for? If the prop has very minor damage does it need to be replaced? When I have it winterized, should I mention this or see what they say first? Anything else I should possible check for damage? Thanks in advance for your responses.