Stromberg CD ethanol resistant O ring kit. Triumph Vauxhall Volvo Hillman With the introduction of in ethanol in petrol many are seeing their Stromberg CD carbs springing leaks from the jet holder and adjuster on the bottom of the float chamber. This is a sure sign that the O rings have failed due to the ethanol content in the fuel. As a solution I’m offering a full replacement O ring kit so you can replace your old ones. These O rings are suitable for use with all fuels containing ethanol. Many owners find that they buy an expensive full carb service kit when all they want to do is just to replace the O rings. You may have difficulty in choosing the correct service kit for your carbs in the first place. All sizes and models of Stromberg CD carbs fitted can be serviced with this one kit of five O rings To simplify things this kit covers all Stromberg CD models, you just fit the O rings that suit your particular carb and discard the rest that you don’t need. This listing is for a single carb O ring kit, no gaskets or other parts are included. If you have twin carbs, please add 2 kits to your basket.