SeaStar HK6320A-3 Hydraulic Marine Outboard Steering Kit The SeaStar Outboard steering kit (HK6320A3) is unmatched in comfort and control for use on single and dual non-power assisted outboard engines up to 350HP (700 combined HP for counter-rotating duals) that have ABYC standard engine tilt tube. Hose comes standard with brass fittings, stainless steel fittings optional above, ideal for salt water applications. This option is only available with us.