Thread: o and io engines
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Old May 4th 06, 07:57 AM posted to rec.aviation.owning
mikem
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Default o and io engines
O is for "opposed", like flat VW and aircraft engines.
I is for "Injected"

so, an O470 is an Opposed, 470 cu. in. engine, by default, its
carburetted

an IO470 is an Fuel Injected, Opposed, 470 cu.in. engine.