852755 Aftermarket Volvo Penta Cylinder Tube 854610 | Sawley's Select Marine Parts

🔧 Product Description

Aftermarket Volvo Penta Square-Cap Trim-Cylinder Tube - Part Number: 852755 / 854610

Replacement hydraulic cylinder tube for the early square-cap Volvo Penta power-trim ram. It renews the pressure-bearing outer tube when corrosion, scoring, distortion or damaged threads make the original cylinder unsuitable for resealing.

⚙️ Key Features

• Early square-cap cylinder-tube design

• Used with the matching original piston rod, piston and end-cap arrangement

• Compatible with the service family covering cylinder numbers 852755 and 854610

• Pressure-bearing hydraulic component; inspect all reused internal parts before assembly

• Normally installed in twin-cylinder Volvo Penta Aquamatic trim systems

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 854610 → Later/alternate complete-cylinder reference associated with 852755

• 852755 → Earlier square-cap trim-cylinder reference

• 853308, 853309, 854550 and 876041 → Related square-cap cylinder service references

OEM / Related Numbers:

• 852755

• 854610

• 853308

• 853309

• 854550

• 876041

• RM852755

Aftermarket / Verified Equivalents:

• Recmar / RM: RM852755 cylinder-tube family

• Five Star Marine: square-cap 290/SP/DP cylinder rebuild system

• Poseidon Marine: 852755/854610 service components

🚤 Compatibility

Commonly used on:

• Volvo Penta early square-cap Aquamatic hydraulic trim cylinders

Typically suits:

• Engine / drive models:

• AQ290 and 290A

• 290DP

• SP-A, SP-A1 and SP-A2

• DP-A, DP-A1 and DP-A2 where the original square-cap cylinder number matches

• HP Range: Drive application; not engine-horsepower specific

• Engine / Drive Type: Twin hydraulic sterndrive trim-cylinder system

• Year Range: Approximately mid-1980s-early 1990s, drive-serial dependent

• Serial / Identification Range: Confirm the number stamped on the original cylinder and the square-cap/imperial-thread construction. Later metric 3860881 cylinders use different end-cap parts.

🔌 Function

Contains hydraulic pressure and guides the piston assembly so pump flow can extend or retract the trim ram and position the sterndrive.

Common signs of failure or replacement requirement:

• Hydraulic fluid leaking through a corroded or pitted tube

• Internal scoring that repeatedly damages new seals

• Cylinder distortion or binding through the stroke

• Damaged cap threads or sealing lands

• Drive drifts down despite correctly serviced valves and seals

📦 Condition

• Brand-new aftermarket replacement part

• Supplied as a new replacement component

• Supplied in suitable retail or equivalent packaging