I have recently purchased a 1999 Mercury 25hp tiller handle with electric start from a yard sale. I bought it for $100. The guy told me the bottom cylinder was burned up. I've been looking into it and I've seen mixed information. I've seen some say it can be bored .040 over and some say it can not be bored. Some are saying it is a blind bore and can not be done. If anyone has any input on this please let me know. For $100 I figured it was worth a shot to try and fix it. I am not opposed to fixing the motor because it is in great shape.