Dellortto carb
 

I have a suffolk engine, aluminium body but no engine number visible anywhere, It has magneto coil but no contacts. This engine was running but suddenly died. I have stripped the carb but couldn't see a problem, I cleaned with carb cleaner, rebuilt and refit carb but it will not fire up. I have a spark and If I put petrol through the spark plug hole then try to start it, it will fire for a split second so I am assuming that it is a failure of fuel to the engine. Could you tell me also what the initial carb settings should be to get it running. The carb is a Dellortto 20 13A.