328718 0391037 OMC Trim and Tilt Assembly | Genuine Used Part

🔧 Product Description

Genuine OMC Johnson / Evinrude Hydraulic Trim and Tilt Assembly - Part Number: 0391037

A genuine OMC hydraulic power-trim and tilt assembly from the late-1970s and 1980s Model-H / Model-M family. Number 328718, also formatted 0328718, is the cast hydraulic manifold or housing identifier. Complete hydraulic assembly 0391037 contains the valve-body and cylinder system used on selected 70HP-235HP outboards.

⚙️ Key Features

• Genuine OMC hydraulic trim assembly
• Complete service number 0391037
• Casting / housing identifier 328718
• Vintage Model-H / Model-M trim-system family
• Used on selected mid- and high-horsepower OMC engines

🚤 Compatibility

• Johnson / Evinrude 70HP, 75HP, 85HP, 90HP and 115HP applications
• Johnson / Evinrude 140HP, 150HP, 175HP, 200HP and 235HP families
• Documented examples include 1981 70HP / 75HP / 90HP / 115HP, 1982 175HP and 1983 175HP / 200HP
• Broad application era: approximately 1978-1992
• Exact fitment depends on H- or M-type stern-bracket and hydraulic layout

🔌 Function

The hydraulic system controls running trim and full engine tilt by directing pressurised fluid to the trim and tilt pistons.

⚠️ Common Signs of Failure

• Hydraulic body leaks
• Piston sleeves are scored
• Motor fails
• Engine drifts down
• Valves stick
• Housing casting is cracked or corroded

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 0391037 is the documented hydraulic assembly number
• 0328718 / 328718 identifies the hydraulic body or housing
• The casting number and complete assembly number are related but not supersessions
• Later OMC three-ram systems use different complete assemblies

OEM / Related Numbers

• 0391037 / 391037
• 0328718 / 328718
• 0320980 related piston sleeves
• Related trim cylinders, valve body, motor and reservoir
• Related seal heads and mounting pins

Aftermarket / Verified Equivalents

• Aftermarket KIT328227 trim-cylinder head / rebuild component for matching units
• Sierra, ARCO and Pro Marine replacement trim motors for compatible vintage OMC systems
• Aftermarket hydraulic seals and O-rings
• No verified new direct complete assembly

📦 Condition

• Genuine used part
• Removed from running engine where applicable
• In good working condition unless otherwise stated