Quicksilver 92-858078Q01 Hydraulic Helm Steering Fluid Quicksilver Hydraulic Helm Steering Fluid is specially formulated for use in Mercury Mercruiser Hydraulic Helm Steering Systems. Can be used in bolt-on steering systems such as SeaStar systems. This steering fluid assures proper lubrication and extended steering system life. Refer to your operation and maintenance manual for service recommendations and use. 32 oz. Quicksilver Hydraulic Helm Steering Fluid cannot be used in place of or mixed