22409357 Shaft | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta Marine Propulsion Gear Shaft - Part Number: 22409357

A genuine Volvo Penta internal shaft used in the FWD-B1 marine propulsion gear train. It operates with the splined sleeve, roller bearings, shims and gear set to transmit torque through the forward-drive assembly. Shaft straightness, spline condition and bearing surfaces are critical because this component runs under continuous rotational and thrust loading.

⚙️ Key Features

• OEM internal shaft for the FWD-B1 propulsion unit

• Works with gear set 22452468

• Supported by the specified roller bearings and needle-roller bushing

• Precision-machined splines and bearing journals

• Designed for the original shim and preload arrangement

• Critical torque-transmission component requiring professional inspection and setup

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 22409357 (current OEM reference)

OEM / Related Numbers:

• 22409357

• VP22409357

• Related splined sleeve: 3852268

• Related retainer: 3855636

• Related roller bearings: 3854250 / 3854249

• Related shims: 3852889 / 3852890 / 3852891 / 3852892

• Related needle-roller bushing: 184654

• Related gear set: 22452468

• Related nut: 852212

Aftermarket / Verified Equivalents:

• No aftermarket equivalent

🚤 Compatibility

Commonly used on:

• Volvo Penta FWD-B1 marine propulsion drive

Typically suits:

• Drive model: FWD-B1

• System: Internal marine propulsion gear train

• Application: Shaft, gear set, bearing and shim assembly

• Engine compatibility: Determined by the complete FWD-B1 propulsion package

• Year range: Determined by drive serial number

• Fitment note: Bearing preload, shim selection and gear contact should be set to Volvo Penta specifications

🔌 Function

The shaft transfers engine torque through the FWD-B1 gear train to the downstream propulsion components. Its machined journals support the bearings, while the splines and gear interfaces carry rotational load and maintain accurate gear alignment.

Common signs of failure:

• Gear or bearing whine that changes with load

• Metal particles in the drive lubricant

• Excessive shaft end float or radial play

• Damaged, twisted or worn splines

• Scored or pitted bearing journals

• Oil-seal leakage caused by shaft wear or runout

• Vibration, knocking or irregular gear contact

• Blueing or heat damage from lubrication failure

📦 Condition

• Genuine Volvo Penta part

• Brand new

• Supplied in original or equivalent packaging