Volvo Penta Exhaust Y-Pipe 3888684 | 4.3L 5.0L 5.7L Short Riser
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Volvo Penta Exhaust Y-Pipe — Part No. 3888684
| Part Number | 3888684 |
| Brand | Volvo Penta |
| Product Type | Exhaust Y-Pipe (Lower Exhaust Pipe Assembly) |
| System | Exhaust |
| Configuration | Standard short-riser exhaust |
| Engine Family | 4.3L, 5.0L, and 5.7L Volvo Penta gasoline sterndrive |
| Quantity per Engine | 1 |
| Required Gasket | 3841013 |
| Required Flange Screws | 3841928 × 4 |
| Weight (estimated) | 4.0 kg |
This is the OEM exhaust Y-pipe for selected Volvo Penta 4.3L, 5.0L, and 5.7L gasoline sterndrive engines fitted with standard short risers. It joins the port and starboard exhaust outlets and routes exhaust gas and cooling water toward the transom exhaust passage. Volvo Penta parts diagrams list 3888684 as the single exhaust pipe seated beneath the two exhaust bellows on applicable short-riser installations.
Compatible Applications
Diagram-confirmed applications (standard short-riser exhaust configuration):
- 4.3GL-G
- 4.3GXi-G
- 5.0GL-H
- 5.0GL-J
- 5.7Gi-G / 5.7Gi-GF
- 5.7GXi-H / 5.7GXi-HF
- 5.7OSi-G / 5.7OSi-GF
- 5.7OSXi-G / 5.7OSXi-GF
- Selected 5.7Gi-300 / 5.7GXi applications using the same short-riser exhaust layout
Riser Configuration & Serial Number Notice
Do not order by engine displacement alone. Volvo Penta produced different Y-pipes for different riser heights on the same engine families:
- 3888684 — standard short risers (this part)
- 3888686 — 3-inch risers
- 3888687 — 6-inch risers
Confirm the exact engine model, serial number, and riser configuration before ordering. Installing the wrong Y-pipe will result in an incorrect fit.
When to Replace
Replace this exhaust Y-pipe when inspection shows:
- Internal or external corrosion or perforation
- Exhaust or water leakage at the lower exhaust connection
- Cracks around the branches or mounting flange
- Severe scaling or restriction inside the pipe
- Damaged hose connection areas
- Corrosion discovered during transom or exhaust-system service
Because this pipe carries both exhaust gas and cooling water, any corrosion damage or leakage should be addressed promptly.
Installation Notes
During replacement, inspect and replace all components in the lower exhaust connection as needed:
- Gasket 3841013
- Flange screws 3841928 × 4
- Exhaust Bellows 3863450
- Hose clamps 3863442
- Plug 3888557
Clean the transom mating surface thoroughly and replace any sealing components that are hardened, corroded, or damaged before reassembly.
Related Parts
Alternate Part Numbers by Riser Height
- 3888684 — standard short risers (this part)
- 3888686 — 3-inch riser Y-pipe (not interchangeable)
- 3888687 — 6-inch riser Y-pipe (not interchangeable)
- 3841847 — standard short-riser Y-pipe for 8.1L applications (not interchangeable)
Parts Desk Insights
Best use: Order 3888684 when a 4.3L, 5.0L, or 5.7L gasoline sterndrive with standard short risers needs exhaust Y-pipe replacement. This is the correct OEM choice for the most common short-riser exhaust layout on these engine families.
Common customer issue: The most frequent ordering mistake is selecting a Y-pipe by engine size without confirming the riser height. Because 3888684, 3888686, and 3888687 all cover the same engine displacements but different riser configurations, ordering without verifying riser height results in the wrong part. Always confirm whether your engine has standard short, 3-inch, or 6-inch risers before purchasing.
Shipping information
In-stock and OEM parts: ship same or next business day.
Supplier-stock items are usually ready for pickup or shipping within 24 hours of ordering.
Special-order timing may vary.
Returns & warranty
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If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
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Item must be in new, unused condition
Product must be in its original packaging
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Packaging must be undamaged and suitable for resale
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