listing placed 12 February 2020 United Kingdom

Le Bozec fuel valve for Fournier RF3

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Anyone got a single way Le Bozec fuel valve, as used on Fournier RF3s (and I think RF4s & RF5s) ?

Ours has died after not even 60 years - leak past valve seat :-((

Alternatively, any hints on dismantling / repair - we can't get the thing apart...