It would help that you specified the make and model of the engine, and the device to which it is attached. Note that vertical shaft engines are notorious for single application use, and the end of the shaft may have nearly anything on it.
American Patriot aka Rocmike has stolen Dfrogpongs moniker. This lonely insane loser has been posting 31 out of the last 39 hours under Bill, Tweek, dfrogpong, Ladydarko, Rick Barnett, Bob Suffolk, Top Renner, Anonymous, Lady Aban who is still posting and a few others. This loser needs help and a life.