Volvo Penta Exhaust Pipe 3858873 – SX / DP-S Sterndrive
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Volvo Penta OEM Exhaust Pipe – Part No. 3858873
| Part Number | 3858873 |
| Brand | Volvo Penta |
| Component Type | Exhaust Pipe / Exhaust Pipe Assembly |
| System | Rear Exhaust / Transom Exhaust Passage |
| Drive Application | SX and DP-S sterndrive configurations |
| Diagram Position | Transom / gimbal-area exhaust connection — typically secured with four flange screws |
| Weight | Approx. 4.0 kg |
| Supersedes | 3855281 (earlier Volvo Penta number); related earlier reference 3850794 |
| Replaced By | No documented replacement — 3858873 is the current active OEM number |
| Related Exhaust Seal | 3852846 (exhaust pipe seal — used in applicable assemblies) |
Compatible Applications
Confirm fitment by exact engine model, production year, and drive configuration before ordering. A 5.0L or 7.4L engine may use a different exhaust pipe depending on the sterndrive fitted — this part is specifically for SX and DP-S installations. Other transom systems (290 DP, DPX) use different exhaust pipe numbers.
- Volvo Penta 4.3L gasoline engines with SX or DP-S sterndrive
- Volvo Penta 5.0L gasoline engines with SX or DP-S sterndrive
- Volvo Penta 5.7L gasoline engines with SX or DP-S sterndrive
- Volvo Penta 7.4L gasoline engines with SX or DP-S sterndrive
When to Replace
Replace this exhaust pipe if it is cracked, corroded, distorted, or leaking exhaust gases or cooling water at the transom connection. Inspect it closely any time the engine or transom assembly is removed for major service, as the pipe and its sealing surfaces are exposed to significant heat cycling and corrosion over time.
Installation Notes
Before installation, inspect the exhaust pipe seal (3852846), connecting hoses, clamps, and the four flange screws listed in applicable diagrams. Ensure all mating surfaces at the transom are clean and free of corrosion before seating the new pipe. Torque flange screws to the Volvo Penta specification for the assembly.
Related Parts
Technical FAQ
Will this fit my 290 DP or DPX drive?
No — 3858873 is specifically for SX and DP-S applications. Volvo Penta uses different exhaust pipe part numbers for 290 DP, DPX, and other transom systems. Confirm by drive type and serial number before ordering.
What superseded parts does 3858873 replace?
3858873 supersedes earlier Volvo Penta exhaust pipe 3855281. An earlier related reference, 3850794, also appears in some application histories. Use 3858873 as the current ordering number.
Do I need to replace the exhaust seal at the same time?
Yes, in most cases. Exhaust pipe seal 3852846 is listed adjacent to this pipe in applicable diagrams. Since the seal is exposed whenever the pipe is removed, replacing it at the same time is the recommended practice to prevent exhaust or water leaks after reassembly.
Is this an exhaust pipe kit or just the pipe?
Volvo Penta catalogs 3858873 as an exhaust pipe assembly — confirm the exact kit contents against your parts diagram, as hardware and seal inclusion can vary by application and production period.
Parts Desk Insights
Drive type is the most critical fitment detail for this part — customers often know their engine displacement but not their sterndrive model, and exhaust pipe applications split between SX, DP-S, 290 DP, and DPX configurations. This pipe comes up most during transom rebuilds, engine replacements, or when a customer reports exhaust smell or water ingress at the back of the boat. Ordering the exhaust seal at the same time avoids a second service visit.
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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