Transom Seal Service Kit – Fits Volvo Penta SX/DP & OMC Cobra Stern Drives (Replaces 3854127, 914036, 3850426)
Transom Seal Service Kit – Fits Volvo Penta SX/DP & OMC Cobra Stern Drives (Replaces 3854127, 914036, 3850426) is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
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Transom Seal Service Kit – Fits Volvo Penta SX/DP & OMC Cobra S...
Transom Seal Service Kit – Fits Volvo Penta SX/DP & OMC Cobra Stern Drives (Replaces 3854127, 914036, 3850426) is backordered and will ship as soon as it is back in stock.
Product Details
This aftermarket Transom Seal Service Kit is designed to service the bellows and related sealing components on compatible Volvo Penta SX/DP and OMC Cobra stern drives. The kit combines the main bellows, gimbal bearing, water inlet hose, and outdrive mounting gasket components needed for a comprehensive transom-service repair.
It is intended for Volvo Penta SX, SX-S, SX-C, SX-R, SX-M, DP-S, DP-S1, and DP-SM drives. It also fits most OMC Cobra stern drives from 1986 and later according to the applicable drive configuration. Confirm the drive model and existing part numbers before ordering.
- Includes a U-joint bellows with clamp and an exhaust bellows with clamp.
- Includes a shift cable bellows, gimbal bearing, water inlet hose, outdrive mounting gasket kit, and hose clamps.
- Provides replacement references for commonly serviced Volvo Penta and OMC Cobra transom components.
- Designed for stern-drive transom service; installation should follow the applicable service manual.
Part Number Matrix
The references below identify component and aftermarket equivalents associated with this service kit. They do not indicate that every listed number is a separate item in the package.
| Component | Brand | Reference Numbers |
|---|---|---|
| U-joint bellows | Volvo Penta | 3854127, 3841481, 22197130 |
| U-joint bellows | OMC Cobra | 3854127 |
| U-joint bellows | Sierra | 18-2765 |
| Exhaust bellows | Volvo Penta | 3850426 |
| Exhaust bellows | OMC Cobra | 914036 |
| Exhaust bellows | Sierra | 18-1074 |
| Shift cable bellows | OMC Cobra | 911826 |
| Gimbal bearing | OMC Cobra | 3853807 |
| Water inlet hose | OMC Cobra | 911830 |
Engine & Model Compatibility
Compatibility is determined by the stern drive and its configuration rather than by engine horsepower or stroke alone. Match your drive model and the original component numbers before installation.
| Brand | Drive Series | Specific Models | Years | Notes |
|---|---|---|---|---|
| Volvo Penta | SX/DP | SX, SX-S, SX-C, SX-R, SX-M, DP-S, DP-S1, DP-SM | As applicable to the drive configuration | Use the original drive and component numbers for final verification. |
| Brand | Drive Series | Years | Notes |
|---|---|---|---|
| OMC | Cobra stern drive | Most models from 1986 and later | Drive subtype and bellows configuration must be checked before ordering. |
Technical Specs
- Product Type
- Transom bellows service kit
- Application
- Volvo Penta SX/DP and OMC Cobra stern drives
- Kit Configuration
- Multi-component replacement service kit
- Included Fasteners
- Hose clamps included; quantity may vary by packed kit
- Material
- Not specified by the supplied product record
- Installation
- Service-manual procedure; professional installation is recommended
- Brand Status
- Aftermarket replacement, not an OEM product
What’s in the Box
- 1 x U-joint bellows with clamp — replaces 3854127, 3841481, 18-2765, and 22197130
- 1 x Exhaust bellows with clamp — replaces 3850426, 18-1074, and 914036
- 1 x Shift cable bellows — replaces 911826
- 1 x Gimbal bearing — replaces 3853807
- 1 x Water inlet hose — replaces 911830
- 1 x Outdrive mounting gasket kit
- Hose clamps
Installation Notes
- Disconnect the battery and secure the boat according to the manufacturer’s safety procedures.
- Remove the stern drive and related components using the applicable factory service manual.
- Remove the old bellows and inspect the transom assembly, bell housing, gimbal area, and mating surfaces for corrosion or water intrusion.
- Clean and prepare all sealing and mounting surfaces. Do not reuse damaged clamps, seals, or fasteners.
- Install the replacement gimbal bearing, bellows, water inlet hose, gasket kit, and clamps in the correct locations and orientations.
- Use only the adhesive or sealant specified by the service manual for the applicable drive.
- Reinstall the stern drive, torque fasteners to the manufacturer’s specifications, and check shifting, alignment, and sealing before launching.
Troubleshooting & FAQ
How do I confirm that this kit fits my boat?
Check the stern drive rather than the boat hull. The supplied fitment covers Volvo Penta SX, SX-S, SX-C, SX-R, SX-M, DP-S, DP-S1, and DP-SM drives, plus most OMC Cobra drives from 1986 and later. Compare the numbers on your existing components and verify the drive subtype before ordering.
What components are included?
The kit includes one U-joint bellows with clamp, one exhaust bellows with clamp, one shift cable bellows, one gimbal bearing, one water inlet hose, one outdrive mounting gasket kit, and hose clamps.
Does the kit include an oil seal or zip ties?
No oil seal or zip ties are listed in the applicable company package contents. The package includes the outdrive mounting gasket kit and hose clamps instead.
Are special tools required?
Bellows and gimbal-bearing replacement may require drive-specific removal, bearing, alignment, and installation tools. Follow the service manual and use a qualified marine technician if the required tools or procedures are unfamiliar.
What are common signs that the bellows need service?
Inspect for cracking, tears, hardening, loose clamps, water intrusion, corrosion, or lubricant contamination. Any damaged bellows should be replaced promptly to help protect the stern-drive assembly.
Is this an OEM kit?
No. This is an aftermarket replacement kit that uses the listed OEM and aftermarket reference numbers for identification and fitment comparison.
Safety & Important Info
- Verify the stern-drive model, configuration, and original component numbers before ordering.
- Do not rely on engine horsepower, stroke, or year alone to determine fitment.
- Use the manufacturer’s service manual for removal, installation, sealant selection, alignment, and torque specifications.
- Professional installation is recommended for safe and reliable stern-drive service.
About Sea Sierra
- Marine Replacement Parts — We supply aftermarket marine components identified by practical OEM and aftermarket reference numbers.
- Fitment-Focused Listings — Product information is organized around drive series, component function, and verification points.
- Service Support — Always consult the applicable service manual for installation and maintenance procedures.
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