This 4" Garrett traction engine came to us to sell on behalf of the owner, it had been unsteamed for a number of years so before being sold we had to have it thoroughly inspected by an independent boiler inspector.
The video shows a trial run after the steam test and highlighted the timing needing adjustment and the big-end re-machining to sort the knocking noise from the motion. Apart from this the engine needed very little and like most of the Garretts we see was a free steaming and powerful engine.