then tell me why it won't start now and when it does it won't rev up and i have leaned out the compression and everywhere in the middle same thing it won't run smooth if you lean out the carb it starts a hit and miss so u have to richen it back up or it will die. if i need a new carb then how much is that. also like i told you i'm trying to run it on old davis diesel fuel and i put some either in it to make sure that wasn't the problem