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uberthumper · # 3 22-08-11, 15:43

The thought of a one way valve had crossed my mind, but I'd veered away from it for a couple of reasons:

- I have no real idea where you'd get one that would be up to the job (not convinced by the whoopee cushion idea), whereas I know all sorts of places I can pick up a long bit of hose and a dry-break coupling.

- I would have thought the engine needs to suck a bit of air back in to keep the pressure equalised as it cools down when you stop. I'm not sure what would happen if you prevent that air coming in through the breather.