Evinrude 9;9 choke issue solved

[sceh]

My 9;9 (1983 J10BALCTR) would only run with the choke kalf out so after taking the very good adivce here I took out the carb, cleaned it with air and petrol and chnged the florat, needle valve and so on with a kit from China. The only bug was the brass float valve item instantly cross threaded and din't seem right so I used the old one.
The engine now idles perfectly and runs well excpet for a minor glitch - at half throttle or so the speed varies all by itself, just occasionally speeding up. Any clues?

BTW, dismounting and stripping the carb is child's play but if you have never done it I guess the prospect is daunting

 

[tomhath]

It might speed up if it runs too lean for a little while (starved for fuel). Make sure the tank vent is open, check for good connections and look for air leaks. Maybe open the fuel mixture a little.