Flushing motor in a barrel - any cons?

[McGillicuddy]

I picked up a 55 gallon barrel thinking I'd cut it down and use it to flush my motor rather than using the rabbit ears. Thought it would be a lot quieter and not put unnecessary pressure on water intake and pump. Are there any cons, like cycling carbons or oils through the system, to doing this, or should I stick to the hose method? I have a 2-stroke Merc inline 6 if it matters...