if the carb is unusable at the mo,whats to lose?

?? i say go for it without the powder,then,if still full of pooe go with the powder......by the way,have you tried cellulose thinners?

gun cleaner grade does a fab job on old carbs,melts jellyfied/hardened unleaded as well.just done some jets on an old m/bike for my brother,stick it in a tin cover and let it soak for a day or two......£7.00 a gallon here,cheap for the job