I have an 8n that was running a little rough and needed to have the choke out to run smooth. I thought it was a carb issue, so I bought a replacement and replaced it, still pretty much doing the same thing, that requires it to almost be full choked to run. Is this a gas mix issue? I have tried to alter the fuel mixture screws but not getting anything that seems to work, ideas? Could this be a points issue? I put new wires on as one had a small cut, but cant imagine that is doing anything.