I recently took ownership of a Weaver I-4 Pacific. The engine looked like it had never been run. I did some light lubrication to the wheels before running. The unit chuffs intermittently. It will not be chuffing, run over a switch and start . It may continue for a few seconds or for several minutes before going silent again. I am not familiar with how the Chuff is generated? Any suggestions would be appreciated. Bill
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