I'm not so certain of that just to be hard to get along with .I have a BG 85 and a BR 400 I've had for over ten years and they have always started rather easily .I'm not one to run all over the state of Ohio for non ethanol gasoline either . Although on both those units if the carbs have mylar innards or buna-n ,don't know .I've never had them apart .The next month or so ,fall you know when the falling leaves are measured by the ton I'll either have good luck or need to rebuild a couple of carbs .I damned sure am not going to rake them .