Thank you for all the info chaps.
As a low cost option (perhaps worth a try), I'll get a sea foam type product to see if that cleans the kak out.
Failing that, a complete strip/clean of the carb assembly.
As a low cost option (perhaps worth a try), I'll get a sea foam type product to see if that cleans the kak out.
Failing that, a complete strip/clean of the carb assembly.