How old is this lawnmower? Yard machines, Briggs and Stratton engine YBSXS. 1581VA is what it says on the engine sticker, it's American, but was brought to the UK a long time ago :
BRIGGS & STRATTON® ALKATRÉSZ - ALKATRÉSZEK - KATTINTS IDE >
BRIGGS & STRATTON® ALKATRÉSZ - ALKATRÉSZEK - KATTINTS IDE >
Eladó briggs - Hajdú-Bihar - Jófogás
ÜZEMANYAGRENDSZER - BRIGGS & STRATTON
FUEL TANK BRIGGS AND STRATTON YBSXS 1581VA FUEL TANK. | eBay