I've acquired a non-running Suzuki 2.2 outboard. It has a spark & plenty of compression. I've cleaned out the carb twice, cleaned the fuel tank and used fresh fuel. On the bench it seems to start easily but when put it in the water butt it refuses to start. Taken out it then starts on the bench, put it back in the butt and it won't start. The water is about 4" above the cavitation plate. I've completely stripped the carb, sprayed with carb cleaner and reassembled.
The only thing I'm not sure about - which adjustment screw is mixture and which is slow running? And how much should each be screwed out to gaet running?