Odd that you had to jumper both, but run with it!
maybe you should take another look at that carb. You said you played with the float a bit. Float setting is appx 21mm. the important thing is to hold the carb such that the spring-loaded float needle is not depressed by the weight of the float. For me, holding it on it's side works best.
When you take the float bowl off, try to not spill the fuel in it so you can check it out. Look for crap in it or what looks like little bubbles (water) in it.
Spray all the passages and jets out really well.
maybe you should take another look at that carb. You said you played with the float a bit. Float setting is appx 21mm. the important thing is to hold the carb such that the spring-loaded float needle is not depressed by the weight of the float. For me, holding it on it's side works best.
When you take the float bowl off, try to not spill the fuel in it so you can check it out. Look for crap in it or what looks like little bubbles (water) in it.
Spray all the passages and jets out really well.