The gas to my stove on my Beneteau 311 (2000) dies after about 20 minutes. Left alone for ten minutes or so and it can be lit again, just to die once more. Is this a solenoid problem or a regulator problem? Or maybe both? The equipment is, I suspect, original. If either/both needs replacing, does anyone know what I need and where to get it? Thanks in advance for your help.