Oh it’s deeper than that. The timing is off, the carb isn’t dialed in right and the fan/shroud isn’t set up properly either. Add to that the fact he just wants to cruise it instead of really running it, and it’s a mess. I could smell the raw fuel coming from it at idle from 100’ away. He keeps starting it and running for a minute or two and shutting it down, at least a dozen times this evening.. I’m sure the plugs are completely fouled now.