HS6 SU Carburettors. HS6 1¾"SU Carburettor. VOLVO P1800. AUD94 (F&R) - P1800 - 1965-66. AUD966 (F&R) - P1800 - 1961-64. It has been found that Ethanol, which is added to unleaded fuel, can attack the normal plastic SU floats.This new SU STAY-UP Float is resistant to modern Ethanol-based Fuels and has a military spec closed-cell construction making it puncture-proof.
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