Fuel tanks: look, do not run

This C20 has more than one tank. Old gasoline in unknown tanks is a fire and varnish problem, not a first-start plan.

During assessment:

Photograph every tank, filler, and line

Trace which filler feeds which tank

Find the selector valve if it has one

Do not crank the engine on leftover fuel

The call on which tanks stay happens after you can see the plumbing, not before.