Engine all back together. Went very sweetly. Unfortunately will not run properly. Seems to be a fuel problem. With a prime with a drop of fuel fires up and runs ok for four or five cycles. So have now dismantled and cleaned the carb but no joy. Any hidden places in the carb that might be blocked? I think dirty old oil got into the carb when I first tipped the motor over to look at the bent shaft. So near yet so far!