21630720 Hub Kit | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta Two-Blade Folding Propeller S-Drive Hub Kit - Part Number: 21630720

A genuine Volvo Penta folding-propeller hub kit for left-hand two-blade blade kits fitted to Volvo Penta S-drives.

The hub carries the two folding blades, transmits drive torque through the S-drive propeller shaft and incorporates replaceable galvanic-protection components.

⚙️ Key Features

• Genuine Volvo Penta OEM folding-propeller hub kit

• Correct Volvo Penta part number 21630720

• For left-hand two-blade blade kits 21629132, 21629140, 21629147, 21629158, 21629173, 21629182, 21629190, 21629198, 21629205 and 21629214

• Fits Volvo Penta 110S, 120S, MS25S, 130S and 150S drive families

• Includes blade pins, fastening hardware, anode set and locking fluid

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 21630720 current Volvo Penta S-drive hub-kit reference

• 23974203 → Supersedes 3858399 for the related salt/brackish-water anode set

OEM / Related Numbers:

• 21630720

• 21626924 blade / shaft pin

• 3584466 propeller nut

• 3851994 lock washer

• 23974203 current salt/brackish-water anode set

• 3858400 optional magnesium freshwater anode set

Kit Contents:

• S-drive folding-propeller hub assembly - part number 21630720 - quantity 1

• Blade / shaft pin - part number 21626924 - quantity 2

• Propeller nut - part number 3584466 - quantity 1

• Lock washer - part number 3851994 - quantity 1

• Hexagon screw - part number 946730 - quantity 1

• Hex socket screw - part number 963677 - quantity 3

• Blade locking screw - part number 3595221 - quantity 2

• Three-piece salt/brackish-water sacrificial anode set - part number 23974203 - quantity 1 set; supersedes 3858399

• Thread-locking fluid 10ml - part number 23284156 - quantity 1

• Installation instructions - quantity 1; no separate part number

Aftermarket / Verified Equivalents:

• Tecnoseal: 00728 / 00728AL replacement anode options for Volvo 23974203 / 3858399

• No complete aftermarket hub-kit equivalent

🚤 Compatibility

Commonly used on:

• Volvo Penta two-blade folding propellers on S-drives

• Replacement of a damaged or worn folding-propeller blade carrier

• Low-drag sailing yacht propulsion

Typically suits:

• Engine / Drive models:

• 110S

• 120S and 120S suffix variants

• MS25S

• 130S and 130S suffix variants

• 150S and 150S suffix variants

• Left-hand blade kits 21629132 / 21629140 / 21629147 / 21629158 / 21629173 / 21629182 / 21629190 / 21629198 / 21629205 / 21629214

• Fitment Notes:

• For S-drive installations only.

• Use left-hand Volvo Penta two-blade folding blade kits.

• Replace the sacrificial anode when materially depleted and select zinc/aluminium or magnesium material for the operating water.

• HP Range: Approximately 5HP-40HP

• Engine / Drive Type: Volvo Penta sailing auxiliary engine with S-drive

• Year Range: Approximately 1970s onward, dependent on S-drive and blade size

🔌 Function

The hub supports the folding blades on their pivot pins, transmits engine torque to the blades and electrically isolates/protects the propeller assembly through its replaceable anodes.

Common signs of failure or incorrect fitment:

• Excessive blade play at the pivot pins

• Hub, blade stops or locking threads damaged

• Propeller loose on the S-drive shaft

• Anode heavily depleted or missing

• Corrosion caused by incorrect anode material or electrical bonding

📦 Condition

• Genuine Volvo Penta part

• Brand new

• Supplied in original or equivalent packaging