I have a 2007 Mercury 50 hp ELPTO with a 10.5 13 pitch SS prop. there is a factory sticker on the top of the cavitation plate that reads 12X22. The stock prop is 10 3/8 with and 13 pitch. Just trying to figure out why I have such a small prop on this motor. I have this motor on a 2008 Lowe 1652 VTC Roughneck. about a 1000lb boat. If I wanted to go up in size how would that change with pitch and engine performance. I do understand that these motors are very universal and get used on many types of boats. Is this sticker just simply stating the max dia. and pitch that can be used.