Ok so I put on a new carborator and it was running great until it seized. Back on shore pull air cleaner.notice bolt holding air cleaner to carb is missing. Only one place that could have gone. Tore engine apart and sure enough it was in the case but not before doing a number on the rotary valve, shaft and upper block. Is it possible to epoxy or fill the grooves or do I nees to find anther block?