I am installing the fuel system on a 912iS. The Rotax "fine" fuel filter that came with the engine has a 1/4" pipe thread fitting on the "IN" but the "OUT" fitting size is a mystery. It is somewhat smaller in diameter than the "IN". The diameter measured by a caliper is approx. .42".
Does anyone know what size this is? Is it a metric size? If so does anyone know the source of a compatible fitting to use?
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