Bellows Transom Repair Kit – Fits Volvo Penta SX Series & OMC Cobra (Replaces 3854127, 3852352, 3850426)
Bellows Transom Repair Kit – Fits Volvo Penta SX Series & OMC Cobra (Replaces 3854127, 3852352, 3850426) is backordered and will ship as soon as it is back in stock.
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Bellows Transom Repair Kit – Fits Volvo Penta SX Series & OMC C...
Bellows Transom Repair Kit – Fits Volvo Penta SX Series & OMC Cobra (Replaces 3854127, 3852352, 3850426) is backordered and will ship as soon as it is back in stock.
Product Details
This Bellows Transom Repair Kit – Fits Volvo Penta SX Series & OMC Cobra (Replaces 3854127, 3852352, 3850426) offers a complete service solution with dual-brand compatibility across Volvo Penta SX-C and SX-M sterndrives (1994–1998) and OMC Cobra models (1986–1993). The kit includes the core components needed to prevent water intrusion and protect critical sterndrive and gimbal systems.
It serves as a direct interchange for primary Volvo Penta, OMC, Sierra, and GLM component part numbers, ensuring a reliable fit for the specified engine models.
- Engineered for clamp-on installation using the included stainless steel hardware.
- Constructed from a durable, marine-grade rubber compound that resists UV, ozone, and saltwater.
- Comprehensive kit includes U-joint bellows, exhaust bellows, water inlet hose, and a complete sealing kit.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number | Notes |
|---|---|---|
| Volvo Penta | 22197130 / 23075752 / 3841481 | Kit Reference |
| Volvo Penta / OMC | 3854127 | U-Joint Bellows |
| Volvo Penta / OMC | 3852352 | Water Inlet Hose |
| Volvo Penta / OMC | 3850426 | Exhaust Bellows |
| OMC | 983973 / 987467 | U-Joint Bellows Cross-Reference |
| OMC | 911830 | Water Inlet Hose Cross-Reference |
| OMC | 914036 / 767724 | Exhaust Bellows Cross-Reference |
| Sierra | 18-2765 | Aftermarket U-Joint Bellows |
| Sierra | 18-1074 | Aftermarket Exhaust Bellows |
| GLM | 89200 | Aftermarket U-Joint Bellows |
| GLM | 89190 | Aftermarket Exhaust Bellows |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
Fitment covers select Volvo Penta SX and DP series sterndrives from 1994 through 1998.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Volvo Penta | SX-C 3.0L | 135 | 4-Stroke | 1994–1998 | 3854127, 3852352, 3850426 | Single propeller drive |
| Volvo Penta | SX-C 4.3L | 190 | 4-Stroke | 1994–1998 | 3854127, 3852352, 3850426 | V6 configuration |
| Volvo Penta | SX-M 5.0L | 220 | 4-Stroke | 1994–1998 | 3854127, 3852352, 3850426 | V8 standard output |
| Volvo Penta | SX-R 5.7L | 250 | 4-Stroke | 1994–1998 | 3854127, 3852352, 3850426 | High performance V8 |
| Volvo Penta | SX-S 5.8L | 275 | 4-Stroke | 1994–1998 | 3854127, 3852352, 3850426 | Ford-based V8 engine |
| Volvo Penta | DP-S 7.4L | 310 | 4-Stroke | 1997–1998 | 3854127, 3850426 | Large displacement V8 |
| Volvo Penta | DP-SM 8.2L | 350 | 4-Stroke | 1997–1998 | 3854127, 3850426 | Marine-specific big block |
Fitment covers OMC Cobra sterndrives from 1986 through 1993.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| OMC | Cobra 3.0L | 140 | 4-Stroke | 1986–1993 | 3854127, 3852352, 3850426 | All clutch dog models |
| OMC | Cobra 4.3L V6 | 175-205 | 4-Stroke | 1986–1993 | 3854127, 3852352, 3850426 | Standard and High Output |
| OMC | Cobra 5.0L V8 | 230-260 | 4-Stroke | 1986–1993 | 3854127, 3852352, 3850426 | Ford and GM engine blocks |
| OMC | Cobra 5.7L V8 | 260-300 | 4-Stroke | 1986–1993 | 3854127, 3852352, 3850426 | Standard and High Output |
| OMC | Cobra 5.8L V8 | 280-320 | 4-Stroke | 1986–1993 | 3854127, 3852352, 3850426 | Ford 351W based engine |
| OMC | King Cobra 7.4L V8 | 330-370 | 4-Stroke | 1987–1993 | 3854127, 3850426 | Verify water hose compatibility |
Technical Specs
- Product Type
- Marine Transom Bellows Repair Kit
- Installation
- Clamp-on with stainless steel hardware
- Fuel Compatibility
- All marine fuel types
- Connection
- Heavy-duty stainless steel clamps
- Housing Material
- EPDM/Neoprene rubber compound
- Housing Color
- Marine-grade black
- Dimensions
- U-Joint: 5.5" × 5.13" × 5.5", Exhaust: 7" L × 3" large end × 2.5" small end
- Weight
- Approximately 3.8 lbs (1.7 kg)
- Fitting Type
- Flexible rubber bellows with clamp connections
- Working Pressure
- Up to 57 PSI (component dependent)
- Burst Pressure
- 3× working pressure minimum
- Operating Temperature
- -65°F to +350°F (-54°C to +177°C)
- Warranty
- 12 months manufacturer warranty
- Other Technical Attributes
- UV resistant, ozone resistant, saltwater compatible
What’s in the Box
- 1 x U-Joint Bellows Assembly (Replaces 3854127/983973/987467)
- 1 x Water Inlet Hose (Replaces 3852352/911830)
- 1 x Exhaust Bellows Assembly (Replaces 3850426/914036/767724)
- 1 x Complete Sealing Kit (Replaces 3852537/3852560)
- 1 x Installation Hardware Set (Stainless steel clamps and mounting hardware)
Installation Notes
- Disconnect the boat's battery and ensure the sterndrive is trimmed up to provide adequate access.
- Remove the outdrive assembly according to the manufacturer's service manual procedures.
- Carefully cut and remove the old clamps and bellows, noting the orientation and position of each one.
- Thoroughly clean all mating surfaces on the transom shield and bell housing, removing any old sealant or debris.
- Install the new water inlet hose, exhaust bellows, and U-joint bellows using the new clamps provided in the kit.
- Confirm all bellows are properly seated in their grooves and tighten the clamps to the specified torque.
- Reinstall the outdrive, carefully aligning the U-joint shaft.
- After reassembly, perform an in-water leak test at the dock before operating the boat at speed.
Troubleshooting & FAQ
How do I confirm this kit fits my specific engine?
This kit is designed for Volvo Penta SX-C/SX-M drives from 1994–1998 and OMC Cobra drives from 1986–1993. Please verify your exact model and year against our compatibility tables. Pay close attention to notes for certain models like the King Cobra and DP-S, which may have unique requirements not covered by this standard kit.
What are the signs my old bellows have failed?
Common symptoms of bellows failure include discovering water in the bilge (a sign of a U-joint bellows leak), hearing a roaring or grinding noise from the transom area (indicating a water-damaged gimbal bearing), or observing visible cracks, splits, or deterioration on the rubber components during a visual inspection.
How often should bellows be replaced?
For preventative maintenance, it is recommended to inspect bellows annually for any signs of wear or damage. Full replacement is advised every 3–5 years, with the shorter interval recommended for boats used in saltwater or stored in the water.
Can I replace just one of the bellows instead of the whole kit?
While technically possible, it is strongly recommended to replace the U-joint bellows, exhaust bellows, and water hose simultaneously. These components are exposed to the same operating conditions and age at a similar rate. Replacing them all at once is the most reliable long-term repair.
I have a leak after installation. What should I check?
First, verify that all clamps are correctly positioned within the grooves on the bellows and are tightened to the manufacturer's recommended torque. Ensure the bellows are not twisted or pinched and are fully seated against the transom and bell housing surfaces. Any debris left on the sealing surfaces can also cause a leak.
OEM vs. Aftermarket?
This listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.
Shipping speed & cost
We ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.
Warranty & returns
Covered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused & in original condition). See our policy page or reach out for instructions.
Safety & Important Info
- Verify images/specifications vs your original part. If anything differs—even if your model appears compatible—do not purchase.
- This is an aftermarket replacement, not an OEM component.
- Professional installation is recommended for safety and performance.
About Sea Sierra
- Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.
- Fast Global Fulfillment — Free standard delivery to most regions in 5–15 days.
- Manufacturer-Direct Value — Fair pricing without compromising on materials or QC.
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