21107111 Reversing Gear | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta HS63IV-A Reversing Gear 1.56:1 - Part Number: 21107111

Brand-new genuine Volvo Penta HS63IV-A hydraulic reversing gear with a reduction ratio of 1.56:1. This is the complete V-drive marine transmission, providing ahead, neutral and astern operation through hydraulically actuated multi-disc clutches. The ratio is fixed by the internal gear train and must match the vessel's propeller and driveline calculation.

⚙️ Key Features

• Transmission model: HS63IV-A

• Reduction ratio: 1.56:1

• Hydraulically actuated ahead and astern clutch packs

• Purpose-built marine output and mounting geometry

• Complete reversing-gear assembly; cooler, coupling, mounts and controls are separate

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 21107111 - Current OEM complete-transmission reference

OEM / Related Numbers:

• Volvo Penta 21107111

• VOE21107111

• HS63IV-A

• Ratio 1.56:1

Aftermarket / Verified Equivalents:

• No aftermarket equivalent

🚤 Compatibility

Commonly used on:

• Volvo Penta HS63IV-A marine transmission installations

Typically suits:

• Engine / drive models:

• HS63IV-A - 1.56:1 reduction

• Engine Type: Hydraulic V-drive marine transmission

• Year / Generation: HS63 transmission family

🔌 Function

Transfers engine torque to the propeller shaft, selects ahead/neutral/astern and reduces output speed by the specified ratio.

Common signs of failure:

• Delayed or slipping engagement

• Contaminated or burnt transmission oil

• Abnormal gear or bearing noise

• Oil leakage from seals or cooler connections

• Excessive vibration caused by coupling or internal wear

📦 Condition

• Genuine Volvo Penta part

• Brand new

• Supplied in original or equivalent packaging