DRMD421
Nitrous
changed oil on my rocket does the plug with the oring need a washer mine did not have one
It's in your pan of oil. I noticed mine didn't have one either so before I refilled the engine I poured the oil pan into a bucket and sure enough, there was a washer in there I never saw fall. I think it sticks to the pan and when you look away it falls in the pan. I'm glad I didn't put the oil in the engine first.