Yes, Berryman B-12 CHEMTOOL FUEL INJECTOR CLEANER (part #0116) can be slowly poured directly into the carburetor. This is actually tantamount to spraying B-12 CHEMTOOL CARBURETOR, CHOKE & THROTTLE BODY CLEANEr (part #0117) into the carb, just without the benefit of atomization. However, both methods will work.