I used brake clean in my old mculloch super pro 60 to clean it up when i first got it. However after a week i went to take it apart and noticed the rubber hoses were now rotted and cracked. They werent before and my only conclusion was that it was the brake clean. I dont use it any more around rubber and i only use carb cleaner when checking for intake leaks. A side note, carb cleaner with bleach when used on an intake creates a very very toxic gas when the engine is running! I had an air cleaner soaked in brake clean and fired up my pressure washer to dry it out and i thought i was gonna pass out from the exhausst! This aas outside too!