815954A7 Aftermarket Mercruiser Trim Cylinder Starboard | Sawley's Select Marine Parts

🔧 Product Description

Aftermarket replacement Starboard Power Trim Cylinder - Replaces Part Number: 815954A7

New aftermarket starboard-side trim cylinder replacing MerCruiser 815954A7 for Alpha One Gen II drives.

⚙️ Key Features

• Starboard/right-side complete cylinder

• Correct Gen II hose-port orientation

• Current Mercury replacement 8M0118959

• Companion to port cylinder 815935A7

• Serviceable with end cap 806191T and seal kit 25-87400A2

🧰 Kit / Assembly Contents

• 1 × Complete starboard trim cylinder - P/N 815954A7

• 1 × Installed piston rod, piston and gland assembly

• Integrated hydraulic fittings and internal seals

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 8M0118959 → Supersedes 8M0108278, 815954A7, 815954A3 and 815954-1

OEM / Related Numbers:

• 8M0108278

• 815954A3

• 815954-1

• 8M0118959

• 806191T

• 25-87400A2

Aftermarket / Verified Equivalents:

• Sierra/GLM Alpha Gen II starboard cylinder

• Recmar: REC815954A7

🚤 Compatibility

Commonly used on:

• MerCruiser Alpha One Gen II trim systems

Typically suits:

• Engine / Drive models:

• Alpha One Gen II sterndrives

• HP / Drive Range: Drive rating dependent

• System Type: MerCruiser dual hydraulic trim-cylinder system

• Year Range: 1991 onward; drive-serial dependent

• Serial / Component Identification: Confirm starboard-side hose orientation.

🔌 Function

The hydraulic trim cylinder converts pump pressure into linear movement to raise, lower and hold the sterndrive at the selected trim angle.

Common signs of failure / service requirement:

• Drive drifts down after trimming

• Hydraulic fluid leaks from the rod seal or ports

• Cylinder rod is pitted, bent or corroded

• Port and starboard cylinders move unevenly

• Cylinder cannot complete its travel

📦 Condition

• New aftermarket replacement part

• Brand new

• Supplied in original or equivalent packaging