Hynautic ST-06 Hydraulic Throttle Slave Cylinder - Used

Hynautic hydraulic throttle slave cylinder (appears to be model ST-06) for Hynautic hydraulic engine control systems used on inboard marine diesel and gas engines. Aluminum housing with brass cylinder, dual hydraulic ports, spring return, and a slotted multi-position throttle arm for linkage adjustment. Condition: used take-off, untested, with typical patina, oxidation, and shop dirt; all hardware, spring, and arm present. Fluid will be drained and ports capped before shipping. Buyer must confirm fitment by part number, photos, dimensions, engine model, serial number, and application before purchase. Used marine part sold as-is unless otherwise stated. No returns on electrical, used, special-order, or installed parts.