VM, that is not uncommon and as I said parts for these carbys are just about impossible. Have you checked the that the decomp valve hose is connected to the inlet manifold and to the decomp, it will suck air in through there. As I said I don't bother with them any more I just fit a modified LM to them and that solves all my problems, but I am not "restoring" these mowers I'm putting them back to work so function is more important to me than "that's not the correct carby on it"

Last edited by NormK; 24/06/18 12:28 PM.