Volvo Penta Exhaust Bellows 3850426 | SX DP-S DP-SM OEM
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Volvo Penta Exhaust Bellows 3850426
Part Number: 3850426
Brand: Volvo Penta
Official Product Type: Exhaust Bellows
Cross-Reference / Interchange: 0767724 (verify by application)
Superseded By: No confirmed universal supersession. 3888916 is a different exhaust bellows for SX-A / DPS-A / DPS-B and is not a direct replacement for this part.
System: Sterndrive Exhaust System
Condition: Genuine OEM
The Volvo Penta 3850426 is the OEM exhaust bellows for selected SX, DP-S, and DP-SM sterndrives. Volvo Penta's official maintenance-parts catalog specifically identifies this part as the exhaust bellows kit for these drive families — separate from the drive-joint (U-joint) bellows used in the same assemblies. Getting the right bellows by part number and drive family avoids a common swap mistake: the exhaust bellows and the U-joint bellows sit close together on the drive but serve different sealing functions.
Compatible Applications
Confirmed by Volvo Penta official maintenance-parts catalog:
- SX Sterndrive
- DP-S Sterndrive
- DP-SM Sterndrive
Extended application references (verify by serial number):
- SX-S
- SX-C / SX-C1 / SX-C2
- SX-R / SX-R1 / SX-R2
- SX-M / SX-M1
- DP-SM variants
Fitment Notice: Always confirm by exact sterndrive model and serial number before ordering. Do not substitute 3850426 for Volvo Penta Exhaust Bellows Kit 3888916, which is listed for SX-A, DPS-A, and DPS-B drives — a different drive family.
When to Replace
Inspect or replace this bellows when you observe any of the following:
- Cracking or splitting in the rubber body
- Hardened, brittle, or deteriorated rubber
- Loose or corroded retaining clamps
- Distortion or deformation at the sealing ends
- Exhaust leakage at the transom or drive connection
- Damage found during annual sterndrive service
Bellows condition should be checked any time the drive is removed for routine service.
Installation Notes
During replacement, inspect the mating exhaust connections and any related clamp and retaining hardware. Seat the bellows correctly at both ends before tightening clamps. While the sterndrive is accessible, inspect the nearby U-Joint Bellows and seawater hose — these components are commonly serviced in the same visit. Note: genuine 3850426 may be supplied without clips; confirm hardware before beginning service.
Alternate / Cross-Reference Part Numbers
- Volvo Penta OEM: 3850426
- Interchange reference: 0767724 (verify by application)
- Not superseded by 3888916 — that part is for a different drive family (SX-A / DPS-A / DPS-B)
Related Parts & Schematic
- Volvo Penta Exhaust Bellows Kit 3888916 — for SX-A / DPS-A / DPS-B drives
- U-Joint Bellows — separate component serviced in the same area
- Volvo Penta Shaft O-Ring 3852565 — related sterndrive seal
- View Volvo Penta Official Parts Catalog
Service Interval
Volvo Penta recommends inspecting bellows components as part of annual sterndrive service or whenever the drive is removed. Replace at the first sign of deterioration — do not defer once cracking or leakage is present.
Parts Desk Insights
Most common customer scenario: Boat owners and marine service shops ordering during annual bellows inspection or after spotting a leak at the transom during a haul-out.
Watch out for: Confusing the exhaust bellows with the U-joint bellows — both are in the same area of the drive, but they are different parts with different part numbers. Confirm the serial number range to match the correct bellows to the exact drive variant. Also check whether clamps and retaining hardware are included or need to be ordered separately.
Technical FAQ
Q: Is 3888916 a direct replacement for 3850426?
No. Volvo Penta lists 3888916 for SX-A, DPS-A, and DPS-B drives — a different and later drive family. It is not a universal supersession of 3850426.
Q: Does this include the clamps?
Genuine 3850426 may be supplied without clips. Confirm hardware availability and order related clamp and retaining components separately if needed.
Q: How do I confirm this fits my drive?
Locate your exact sterndrive model designation and serial number on the drive itself or in your owner's documentation, then cross-reference against the Volvo Penta parts catalog for your specific drive generation.
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 1-3 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
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