I have a swisher finish mower that is running really rough, pops a lot out of the muffler while running. Kind of like a mini backfire. It doesn't seem to rev like it should. It's been doing this for a while but after setting for a full year it's much much worse. It's not running strong enough to engage the blades without dieing before it even turns them.
I've replaced the fuel filter, air filter and cleaned the carb. It may be that my carb cleaning isn't up to par. I wanted to buy some Chemdip but the best I can tell, they can no longer sell this stuff in the U.S. Hmm something that works so the EPA takes it off of the market?? So anyway I just used some spray carb cleaner, and sprayed it on all surfaces and through every orifice I could see. I haven't pulled the plug to see how lean it's running but something tells me it's really lean.
The engine is a 14.5 hp Briggs and Stratton model 31A507 0114 B1
Any input would be greatly appreciated.