Office of Steam Forum for Model & Toy Steam Gas & Hot Air Engines

Nick, the flat wick burner has a design flaw. There should be a cup around the wick in case of a siphon effect.
On my Marklin that lacked its carb, I ended make a brass cup around a stainless mesh wick and it works flawless.

Mamod burners by design have a similar cup. So they don’t siphon.