Hello, I wonder if you might be able to help please? I am in the process of bringing back to life a Briggs and Stratton Intek Edge 6hp that is fitted to a McCulloch self drive mower. I got it second hand and apart from the inevitable rust on the deck it seemed pretty good. Winter is coming so I've took the chance to give it a bit of maintenance whilst its resting. So all good until I replaced the carb because the previous owner had stripped the threads on the filter. All fitted but despite me connecting the governor, new spring and original throttle plate there now appears to be no movement of the carb when I move the throttle plate back and forth. The replacement carb is pretty much the same but this one has a choke built in. The spring I replaced is exactly the same length and I have looked at various linkage diagrams and all appears correct. I have removed the governor rod and spring and there is no connection between where the remote throttle control fits to the control plate and the carb itself? The model appears to be quite a rare one as far as parts go and little sign of other people having worked on them. The model is 121602-0321 and the carb is listed as a 790120 however there appears some confusion with this as some have primer hole to filter on the left and some right. Mine has the primer built into the air filter housing which evidentially is an issue in itself, having air leakage problems. The other type of carb (with the same number??) has the choke built into the carb body. Any help I would gladly appreciate. I could attempt pictures but my computer skills are somewhat lacking so be patient with me please.