Describe normal use
A separate button or switch and an operating stopper are different arrangements. Give the full model where readable and note whether any accessory is missing.
Why the distinction matters
Starting controls and safety arrangements may not be interchangeable. An engineer can screen the actual fault with the right format in mind. Never substitute an improvised stopper or bypass an interlock.
A useful distinction
The operating format is not reliably identified by the unit's colour or size. A precise account of the ordinary start action can remain useful even when the manufacturer label is inaccessible or worn.