Thanks guys. When I squeeze the hand vacuum pump it just stays compressed. If I turn the engine over it very slowly decompresses, but I can't "pump" it - doesn't seem to have enough force to draw anything through, at least not straight away. Ive managed to draw quite a bit of fuel through by running the engine with some easy start, but there is zero indication it wants to do anything without it. There does seem to be a pretty constant supply of bubbles in the return line, so maybe air is getting in somewhere....
Arrrrrggghhh
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