3808573 21157924 Volvo Flywheel Housing | Genuine Used Part

🔧 Product Description

Genuine Volvo Penta GM Sterndrive Flywheel Housing - Part Number: 21157924

A genuine used Volvo Penta flywheel or bell housing for selected GM-based 3.0L, 4.3L, 5.0L and 5.7L petrol sterndrive engines.

Volvo Penta 21157924 is the later replacement for 3808573. The aluminium housing bolts to the rear of the engine block, encloses the flywheel and coupler and provides the structural connection to the transom shield and sterndrive assembly.

⚙️ Key Features

• Genuine Volvo Penta flywheel housing
• Current reference 21157924
• Supersedes 3808573
• Suits selected GM four-cylinder, V6 and V8 engines
• Supports the engine-coupler and transom interface

🚤 Compatibility

Commonly used on

• Volvo Penta SX and DPS sterndrive engines
• GM-based Volvo Penta petrol engines
• Flywheel, coupler and rear engine-mount assemblies

Typically suits

• Engine models:
• Volvo Penta 3.0GL
• Volvo Penta 3.0GLM and GLP
• Volvo Penta 4.3GL
• Volvo Penta 4.3GXi
• Volvo Penta 4.3OSi
• Volvo Penta 5.0GL
• Volvo Penta 5.0Gi
• Volvo Penta 5.0GXi
• Volvo Penta 5.0OSi
• Volvo Penta 5.7Gi
• Volvo Penta 5.7GXi
• Volvo Penta 5.7OSi
• Engines originally fitted with 3808573 or 21157924
• HP Range: Approximately 135HP - 320HP
• Engine Type: GM 3.0L inline four-cylinder, 4.3L V6 and 5.0L / 5.7L V8 petrol marine engine
• Year Range: Approximately 2000 - 2011

🔌 Function

The housing encloses the flywheel and engine coupler, aligns the engine with the sterndrive input shaft and carries rear-engine and transom loads.

⚠️ Common Signs of Failure

• Cracks around rear engine-mount bosses
• Corroded or stripped bolt holes
• Sterndrive alignment cannot be achieved
• Coupler repeatedly wears or fails
• Abnormal vibration from the rear of the engine
• Water or debris enters the flywheel area
• Housing is distorted after impact or incorrect lifting
• Inspection-cover mounting points are damaged

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 21157924 → Supersedes 3808573
• 3808573 earlier Volvo Penta bell-housing reference

OEM / Related Numbers

• 21157924
• 3808573
• Flywheel inspection cover: 3854604
• Engine coupler references according to engine family
• Rear engine-mount and transom hardware from the SX / DPS installation

Aftermarket / Verified Equivalents

• No aftermarket equivalent

📦 Condition

• Genuine used part
• Removed from running engine where applicable
• In good working condition unless otherwise stated