I have a snapper RER rider with a Briggs 10HP 28A707-0122-02 with a blown engine. It would have to be bored a size over to get it going again and that seems like too much money for a mower and engine that age. I've tried to find a reasonable short block with no luck. A replacement block is $280.00. I've decided a direct replacement is the best route. Can anyone direct me to the right engine? It would be really appreciated. Thank you