The Merc is a bit more robust than that. If it runs dry,.you simply add more fuel and cycle the ignition a handful of times. Same procedure as a filter change.
Managed to run the Alabama Mumsybus dry once... 5 litres was only just enough to prime it
That is true of most but, running it dry means a period of no fuel in the HP pump, metal on metal, no lube, not ideal



