cleaned out the float chamber and jet ? really small hole into the carb body where the jet screws into , clean it out too . really fine wire/tip cleaner or carb spray and air
best i can see both cranks are same length on two 160's i have here one with and one without pulley.
a good spark plug that you KNOW runs well ? might just be a little water in there somewhere . you set the airgap too ?

Last edited by vccomm; 13/07/15 02:18 AM.