On the tractor. Drained the pump too and flushed with fuel by working the lift pump. The hook thing was rusty and sticking, one tractor would stall if you took your foot off the accelerator quickly.Out in the shed?
@Sharpy
Isn't he on holiday?
Yes the top of the pump isn't too tricky to take off, there's a couple of strings inside to watch as you take the top off make sure they go back in the right place I've had a few off but that was more to solve fuel leaking past the spindles (just a small o ring) sounds like the op needs some stenadyne fuel additive to tip in fuel tank or even fill a fuel filter with it, works wondersOut in the shed?
@Sharpy