[Duffman]

Some questions.....
Does he plan on using it at all or just get it running to sell it?
Have you spun the engine over yet?
Have you taken a look at the fuel or in the tank?

If he’s just selling, probably better off selling the way it is and be up front with potential buyer. This way he doesn’t have to deal with old gas/tank cleaning.

If he wants to get it running, I’d personally pull the plugs and fog the cylinders and be sure it turns over. Then change water sep and engine filters. Disconnect fuel line from tank and try firing her up running off a portable tank with clean fresh fuel to see where your at.

No sense in dealing with the main tank til ya know where your at engine wise. Just my .02