21910902 Steering Cylinder | Genuine Volvo Penta Part

🔧 Product Description

Complete hydraulic steering-cylinder assembly for Volvo Penta SX-M, SX-A and DPS-family sterndrives. It converts steering-system hydraulic force into controlled drive movement and is supplied with the specified attachment hardware.

🚤 Compatibility

• Engine Family: D, V, TSK
• HP Range: 110-430 HP

Full model list at the end of this description.

⚙️ Key Features

• Complete hydraulic actuator assembly
• Factory stroke and mounting geometry
• Pressure-rated cylinder and fittings
• Designed for specified sterndrive steering linkage
• Includes listed attachment hardware

📋 Kit Contents

• 21910902 - complete steering-cylinder assembly
• 3850931 - screw, quantity 2
• 3853376 - split pin, quantity 2

🔌 Function

Converts hydraulic pressure from the power-steering system into linear movement that turns the sterndrive.

⚠️ Common Signs of Failure

• Heavy, jerky or uneven steering assist
• Excessive steering play
• Corroded or scored cylinder rod
• Drive drifting or failing to hold steering position

🛠️ Service Notes

• This cylinder replaces a long list of earlier numbers (including 3812269, 3850244, 3854878, 3856710, 3860726, 3860883, 3862210 and 3862513) — if ordering against an old reference, confirm it against this current number rather than assuming a straight swap
• Steering is a safety system: bleed the circuit fully and check lock-to-lock movement and for leaks before the boat is used, and fit the hydraulic line fittings and O-rings supplied with the cylinder rather than reusing old ones

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 21910902 → Supersedes 3812269 → Supersedes 3862513 → Supersedes 3862210 → Supersedes 3860883 → Supersedes 3860726 → Supersedes 3858128 → Supersedes 3850686

OEM / Related Numbers

• 3812269 earlier number superseded by this part
• 3862513 earlier number superseded by this part
• 3862210 earlier number superseded by this part
• 3860883 earlier number superseded by this part
• 3860726 earlier number superseded by this part
• 3858128 earlier number superseded by this part
• 3856716 earlier number superseded by this part
• 3858127 earlier number superseded by this part
• 3850686 earlier number superseded by this part
• 3850244 - related earlier references
• 3854878 - related earlier references
• 3856710 - related earlier references
• 3861035 - bushing
• 3859041 - fittings
• 3859043 - fittings
• 3859040 - O-rings
• 3859042 - O-rings
• 3859048 - cable attachment
• 3859047 - pins
• 3859046 - pins
• 3859045 - split pin
• 3859052 - rings
• 3859051 - rings

Aftermarket / Verified Equivalents

• FSM018-compatible six-piece aftermarket steering-actuator seal/repair kit - service parts only, not a complete cylinder

📦 Condition

• Genuine Volvo Penta part
• Brand new
• Supplied in original or equivalent packaging

🔎 Full Model Compatibility

Typically suits:

• Volvo Penta 8.1GiC-J, 8.1GiC-JF, 8.1GiCE-JF, 8.1GiCE-J, 8.1GiCE-M, 8.1GiCE-P, 8.1GiC-Q, 8.1GiCE-Q, 8.1GiE-KF, 8.1GiE-K, 8.1GiE-M, 8.1GiE-P, 8.1Gi-J, 8.1Gi-JF, 8.1GXiE-K, 8.1GXiE-KF, 8.1GXiE-M, 8.1GXiE-P, 8.1GXi-J, 8.1GXi-JF, 8.1IPSCE-MF, 8.1OSi-J, 8.1OSi-JF, 5.7GXi-320-R, 5.7GXiE-320-R, 5.7GXiC-320-R, 5.7GXiCE-320-R, 5.7GXiC-J, 5.7GXiC-JF, 5.7GXiCE-JF, 5.7GXiCE-J, 5.7GXiCE-M, 5.7GXiC-P, 5.7GXiCE-P, 5.7GXi-J, 5.7GXi-JF, 5.7GXiE-KF, 5.7GXiE-K, 5.7GXiE-M, 5.7GXiE-P, 5.7GXi-P, 5.7OSi-300-J, 5.7OSi-300-JF, 5.7OSXi-J, 5.7OSXi-JF, 5.7Gi-300-J, 5.7Gi-300-JF, 5.7GiCE-300-M, 5.7GiE-300-N, 5.7Gi-300-N, 5.7GiE-300-P, 5.7Gi-300-P, 5.7Gi-300-R, 5.7GiE-300-R, 5.7GiC-300-J, 5.7GiCE-300-J, 5.7GiCE-300-JF, 5.7GiC-300-JF, 5.7GiC-300-P, 5.7GXiE-N, 5.7GXi-N, 5.7GiE-300-K, 5.7GiE-300-KF, 5.7GiE-300-M, 5.7GiCE-300-P, 5.7GiC-300-R, 5.7GiCE-300-R, 4.3OSi-J, 4.3OSi-JF, 5.0GiC-225-S, 5.0GiCE-225-S, 5.0GiC-J, 5.0GXiCE-JF, 5.0GXiCE-J, 5.0GXiC-JF, 5.0GXiCE-M, 5.0GXiC-P, 5.0GXiCE-P, 5.0GXi-J, 5.0GXi-JF, 5.0GXiE-K, 5.0GL-J, 5.0GL-JF, 5.0GXi-270-R, 5.0GXiE-270-R, 5.0GXiC-270-R, 5.0GXiCE-270-R, 5.0GXiC-J, 5.0GXiE-KF, 5.0GXiE-M, 5.0GXiE-N, 5.0GXi-N, 5.0GXiE-P, 5.0GXi-P, 4.3Gi-200-R, 4.3GI-Q, 4.3GL-J, 4.3GL-JF, 4.3GL-P, 4.3GXi-225-R, 4.3GXiE-225-R, 4.3GXiE-M, 4.3GXi-P, 4.3GXiE-P, 4.3GXi-Q, 4.3GXiE-Q, 4.3GXi-J, 4.3GXi-JF, 3.0GLP-J, 3.0GLP-N, 3.0GXiC-J, 3.0GXi-J, 4.3Gi-200-S, 4.3GXi-225-S, 4.3GXiE-225-S
• Volvo Penta V8-350-C-R, V8-350-CE-R, V8-380-C-R, V8-380-CE-R, V8-430-C-R, V8-300-C-M, V8-300-CE-M, V8-350-C-M, V8-350-CE-M, V8-300-C-N, V8-300-CE-N, V8-350-C-N, V8-350-CE-N, V8-380-C-M, V8-380-CE-M, V8-270-C-B, V8-270-CE-B, V8-300-A, V8-300-E-A, V8-300-B, V8-300-E-B, V8-300-C-A, V8-300-CE-A, V8-300-C-B, V8-320-C-B, V8-320-CE-B, V8-300-CE-B, V8-320-A, V8-320-E-A, V8-320-B, V8-320-E-B, V8-320-C-A, V8-320-CE-A, V8-380-CE-A, V8-380-C-B, V8-380-CE-B, V8-380-C-D, V8-380-CE-D, V8-430-CE-D, V8-350-C-D, V8-350-CE-D, V8-380-C-A, V8-380-CE-J, V8-380-C-J, V8-430-CE-J, V8-430-C-J, V8-350-C-H, V8-350-CE-H, V8-350-C-J, V8-350-CE-J, V8-300-C-R, V8-300-CE-R, V8-430-CE-R, V8-430-C-M, V8-430-CE-M, V8-300-C-K, V8-300-CE-K, V8-350-C-K, V8-350-CE-K, V8-380-C-K, V8-380-CE-K, V8-430-C-K, V8-430-CE-K, V8-300-C-P, V8-300-CE-P, V8-350-C-P, V8-350-CE-P, V8-380-C-P, V8-380-CE-P, V8-430-C-P, V8-300-CE-G, V8-300-C-G, V8-300-C-H, V8-300-CE-H, V8-300-C-J, V8-300-CE-J, V8-350-C-G, V8-350-CE-G, V8-225-C-A, V8-225-CE-A, V8-225-C-B, V8-225-CE-B, V8-270-A, V8-270-E-A, V8-270-B, V8-270-E-B, V8-270-C-A, V8-270-CE-A, V8-380-C-N, V8-380-CE-N, V8-430-C-N, V8-430-CE-N, V8-430-CE-P, V8-300-C-S, V8-300-CE-S, V8-350-C-S, V8-350-CE-S, V8-400-CE-R
• Volvo Penta TSK-C-42, TSK-A-AC-52-NPT, TSK-B-AC-42-NPT, TSK-B-AC-52-NPT, TSK B-42, TSK B-42-NPT, TSK B-52, TSK B-52-NPT, TSK B-AC-32, TSK B-AC-42, TSK B-AC-52, TSK B-OX-32, TSK B-OX-42, TSK B-OX-52, TSK SX-A, TSK SX-AAC, TSK SX-AACLT32, TSK SX-AACLT42, TSK SX-ALT32, TSK SX-ALT42, TSK SX-OXI-AACL, TSK SX-OXI-ACC, TSK SX-OXI-ACCL, TSK A-32, TSK A-32-NPT, TSK A-42, TSK A-52-NPT, TSK A-AC-32, TSK A-AC-42, TSK A-AC-52, TSK A-OX-32, TSK A-OX-42, TSK A-OX-52, TSK B-32, TSK-C-AC-42, TSK-C-OX-42, TSK-C-AC-42-NPT, TSK-C-42-NPT, TSK-C-AC-32, TSK-C-OX-32, TSK-C-32, TSK-C-AC-32-NPT, TSK-C-32-NPT, TSK-C-52-NPT, TSK-C-AC-52-NPT, TSK-C-AC-52, TSK-C-52, TSK-C-OX-52, TSK-A-42-NPT, TSK-A-AC-32-NPT, TSK-A-AC-42-NPT, TSK-C-TCC-32, TSK-C-TCC-42, TSK-E-AC-32, TSK-E-32, TSK-E-42, TSK-E-52, TSK-E-AC-42, TSK-E-AC-52, TSK-E-TCC-32, TSK-E-TCC-42, TSK-E-TCC-52, TSK-F-AC-32, TSK-F-AC-42, TSK-F-AC-52, TSK-F-TCC-32, TSK-F-TCC-42, TSK-F-TCC-52, TSK-F-32, TSK-F-42, TSK-F-52
• Volvo Penta V6-200-N, V6-200-C-N, V6-200-CE-N, V6-240-M, V6-240-C-M, V6-240-CE-M, V6-280-M, V6-280-C-M, V6-280-CE-M, V6-280-J, V6-280-CE-J, V6-280-G, V6-280-C-G, V6-280-CE-G, V6-280-C-J, V6-240-N, V6-240-C-N, V6-240-CE-N, V6-280-N, V6-280-C-N, V6-240-CE-K, V6-280-CE-K, V6-200-P, V6-200-C-P, V6-200-CE-P, V6-250-P, V6-250-C-P, V6-250-CE-P, V6-280-P, V6-280-C-P, V6-280-CE-P, V6-200-C-G, V6-200-G, V6-200-J, V6-200-C-J, V6-200-A, V6-225-A, V6-225-E-A, V6-280-CE-N, V6-200-M, V6-200-C-M, V6-250-O, V6-250-C-O, V6-250-CE-O, V6-240-C-G, V6-240-CE-G, V6-240-G, V6-240-J, V6-240-CE-J, V6-240-C-J, V6-200-R, V6-200-C-R, V6-250-R, V6-250-C-R, V6-250-CE-R, V6-280-R, V6-280-C-R, V6-280-CE-R
• Volvo Penta D3-130I-C, D3-220I-G, D3-130A-C, D3-160A-C, D3-140A-G, D3-170A-G, D3-200A-G, D3-220A-G, D3-140I-G, D3-190A-C, D3-170I-G, D3-200I-G, D3-110I-H, D3-160I-C, D3-190I-C, D3-140A-H, D3-170A-H, D3-200A-H, D3-220A-H, D3-150I-H, D3-170I-H, D3-200I-H, D3-220I-H, D3-140I-H