AEU 4003 - Repair Kit, Zenith 36 IV, Model 4085 Carburettor Land-Rover Series 2a and 3 £47.40 Quantity: at £47.40 each Out of Stock Out of stock. Repair Kit, Zenith 4085 Carburettor This is a new replacement Repair Kit for the 2¼ Petrol Zenith 36 IV Carburettor as fitted to late Series 2a and Series 3 models. This kit is suitable only for the later type Zenith carburettor, model 4085, which has a spring loaded volume control screw with a fine thread. The earlier type Zenith carburettor, model 3888, which is identified as having a volume control screw of slightly coarser thread and with a locknut, uses a different kit, 605092. See our other items. Not believed to be suitable for the Zenith 34 IV, use 605092.