Reference: Carrying extra fuel in CMP on long trips.....

[maple_leaf_eh]

Originally Posted by maple_leaf_eh

We know engines are compressors. But what about sprayed fuel in your tubes?

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Originally Posted by Grant Bowker

To start with I wondered about that too but it turns out that there's a diaphragm between the cylinder gasses in the pump and the atmospheric air being compressed into the tyre. The pulsing pressure from the engine's cylinder provides the power to move fresh air through check valves and the pump to the tyre being inflated without any mixing of the two sets of gasses. Due to the now imbalanced cylinder pressures without the combustion cycle it is advised not to rev the engine highly in a desire to speed the inflation...

I "invested" a half hour of company time Googling and Youtubing for engine air compressors. It seems old Mr. Schrader the tire valve inventor would sell you a spark plug adaptor and a piston pump that blocked the cylinder head, but pressurized fresh air to go to your flat tire. Very clever! Now do I go looking for one on Amazon?