Running good then running bad?

[serenity]

I finally got issues with my 60 running rough sorted out after much frustration, and she is running perfect for all of a day. park her on the front lawn the other night and when i go to start her the next morning she is running rougher than ever. the only thing that would have changed over night is the humidity and maybe a bit of dew... any suggestions as to where to start looking for the problem?

note: getting plenty of fuel and air, got strong spark to all cylinders.

 

[inkpot]

Howdy! Did the temperature change enough to allow a stuck choke to cause the problem? John

 

[mstowe]

Mine did the same thing...ended up being the choke getting stuck...

 

[serenity]

choke cable getting stuck or the actual choke mechanism in the carby? i had previous issues with the choke cable so i disconnected it, been running without any choke.

 

[serenity]

ok checked the choke and its definitely not an issue, still missing and blowing lots of black smoke...