Yes, the 'paraffin' mentioned in post #1 is the UK term for what would be called 'premium kerosene' in some other countries.
The stove in question now works it was in fact over filled with paraffin it just needs a new pump washer else it de pressureises
Good to hear it's nothing more drastic! I thought you checked the fuel level earlier in the thread when you added a measured 145ml of fuel? If the stove is losing pressure it will be the filler cap seal/pump valve internal seal/pump valve washer/vapouriser to tank seal. The pump leather cup washer allows air to be added to the tank but doesn't keep it there.
I did but that was apparently enough to have it running rich it would explain the problem my 210 was having as well as it had been fine prior to adding more fuel
No. If the pump rod is creeping out, that is due to loss of pressure, but not the fault of the leather pump washer. At the far end of the pump tube there is a screwed in brass valve assembly, the Non Return Valve (NRV for short). By way of spring resistance and a cork or rubber seal, that valve closes the hole where the air is pumped in, thus stopping the pressurised air/fuel from escaping. If that valve fails to seal it allows an escape of the pressure - either air or more likely fuel, which sometimes pushes the pump back up the tube (pump creep). Your seal kit should include a small circular viton pip seal; the harder part (sometimes) is the unscrewing and withdrawal of the old valve assembly. Lots of posts on the forum about that and the design of suitable tools to remove and replace the assembly. Some of the tools for sale on ebay etc may be better or worse than others!
