I recently purchased a 1939 John Deere B tractor. I'm new to collecting and learning but cannot find an answer to this question. The tractor has a DLTX-73 carburetor installed which isn't the correct carburetor for this year tractor. The tractor will idle but not run at full throttle. The previous owner rebuilt the carburetor but it has been sitting awhile and I think needs to be gone through and cleaned. Before I invest into a rebuild kit can someone tell be if the tractor should run properly with this carburetor or should I search for an older model carburetor. It is supposed to have the DLTX-10. Any help is greatly appreciated.