No Geoff, but it is related to Champion and AC spark plugs.
Further checking today suggest that the pump is working but that I am sucking air into the system. Bubbles are clearly being drawn into the in line filter when the engine is at tick over.
I've checked all the joints and the only thing left is the fuel cock. It was very stiff but I have used it several times when removing the in line fuel filter and petrol pump.
Is this a known problem? It couldn't have been used for decades previously.
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