SKU: 80423614829

U-Joint Shift Bellows Kit – Fits OMC Cobra (1986 & Later) and Volvo Penta SX/DP Models (Replaces 3854270, 3858631)

Sale price$67.05 Regular price$74.50
Save 10%

Pay in installments of $18.62 with ShopPay, AfterPay and Klarna

Shipping Estimate
USA
  • USA
  • CAN

Ships within 48 hours · Estimated delivery Aug 22 - Aug 27

Promo Codes Available:

For Your Every Summer RSVP, with Code: SUMMER15

Description

U-Joint Shift Bellows Kit – Fits OMC Cobra (1986 & Later) and Volvo Penta SX/DP Models (Replaces 3854270, 3858631)U Joint Shift Bellows Kit Fits OMC Cobra (1986 & Later) and Volvo Penta SX DP Models (Replaces 3854270, 3858631) This U Joint Shift Bellows Kit provides a reliable replacement for specific OMC Cobra and Volvo Penta sterndrive models. It is engineered to protect the crucial U joint and shift cable components from water intrusion and damage, ensuring smooth and safe operation. This kit is a direct replacement for OMC Stern Drive part numbers 3854270 and

U-Joint Shift Bellows Kit – Fits OMC Cobra (1986 & Later) and Volvo Penta SX/DP Models (Replaces 3854270, 3858631)

This U-Joint Shift Bellows Kit provides a reliable replacement for specific OMC Cobra and Volvo Penta sterndrive models. It is engineered to protect the crucial U-joint and shift cable components from water intrusion and damage, ensuring smooth and safe operation.

This kit is a direct replacement for OMC Stern Drive part numbers 3854270 and 3858631, and Volvo Penta part numbers 3854270 and 3858631.

  • Designed as a direct replacement for hassle-free installation.
  • Manufactured from high-grade rubber/neoprene to meet or exceed OEM specifications.
  • Includes one U-Joint Bellows and a corresponding clamp.

Part Number Cross-Reference

Use this table to confirm equivalent part numbers across OEM and aftermarket brands.

Brand Part Number
OMC Stern Drive 3854270/3858631
Volvo Penta 3854270/3858631
GLM 21962
Sierra 18-2771
Mallory 9-72930

Compatible Engine Models

Confirm your engine model/year in the table below.

OMC

Brand Model Years OEM Part No. Notes
OMC Cobra 1986 & Later 3854270/3858631 Without cone clutch

Volvo Penta

Brand Model OEM Part No.
Volvo Penta SX-S 3854270/3858631
Volvo Penta SX-C 3854270/3858631
Volvo Penta SX-R 3854270/3858631
Volvo Penta SX-M 3854270/3858631
Volvo Penta DP-S 3854270/3858631
Volvo Penta DP-S1 3854270/3858631
Volvo Penta DP-SM 3854270/3858631

Technical Specifications

Specification Value
Product Type U-Joint Shift Bellows Kit
Installation Direct replacement
Connection OEM-matching fittings
Housing Material Rubber/neoprene
Housing Color Black
Fitting Type OEM-compatible fittings with clamps
Warranty 1 year manufacturer's warranty
Other Technical Attributes Manufactured to OEM specifications using the exact same material as the originals. Produced in an ISO9002 certified factory.

Package Contents

  • 1 x U-Joint Bellows with Clamp (Replaces 3854270/3858631)

Installation Guide

  1. Ensure the engine is off and the sterndrive is trimmed to the full "up" position for access. Disconnect the negative battery terminal for safety.
  2. Carefully remove the old bellows and any clamp remnants. Inspect the drive and transom housing for cracks or damage.
  3. Thoroughly clean the mounting surfaces on both the transom and drive unit to ensure a clean, debris-free seal.
  4. Position the new U-Joint bellows, ensuring it is correctly seated and aligned on both ends without any twists.
  5. Secure the bellows using the provided clamp. Tighten the clamp to the manufacturer's recommended torque specification.
  6. After securing, double-check the seal around the entire bellows to confirm it is seated properly and will prevent water leaks.
  7. Reconnect the battery terminal, lower the drive, and test the installation by running the engine in the water and checking for any signs of water intrusion.

Troubleshooting & FAQ

Q: How can I confirm this bellows kit fits my specific sterndrive?

A: This kit is designed for OMC Cobra models from 1986 and later (without a cone clutch) and specific Volvo Penta models (SX-S, SX-C, SX-R, SX-M, DP-S, DP-S1, DP-SM). Cross-reference your original part number with the numbers provided (OMC/Volvo Penta 3854270/3858631, GLM 21962, Sierra 18-2771, Mallory 9-72930) to ensure an exact match.

Q: What are the signs that my U-Joint bellows needs replacement?

A: Common signs of failure include visible cracks, splits, or dry rot on the rubber. Water found inside the boat's bilge area or a grinding noise from the U-joint during operation are critical indicators that replacement is needed immediately to prevent costly drive failure.

Q: How often should the U-joint bellows be replaced?

A: It is recommended to inspect the bellows annually and replace them every 3-5 years as part of a regular preventative maintenance schedule, or immediately if any signs of wear, aging, or damage are found.

Q: OEM vs. Aftermarket?

A: This listing is an aftermarket replacement part (not an OEM component). We build to OEM specifications using comparable-grade materials. Production is done in an ISO9002-certified facility, and each batch is inspected for consistent performance.

Q: How fast do you ship and how much does it cost?

A: We offer fast global shipping—typically 5–15 days worldwide—and standard shipping is free. Expedited options are available at checkout depending on your location.

Q: What is your warranty and return policy?

A: This product includes a 1-year warranty against manufacturing defects under normal use. If something goes wrong, contact our support team with your order details. Returns are accepted within our standard return window (unused & in original condition); please see our policy page or reach out for instructions.

Important Notes

  • Verify that the product images and specifications match your original part. If discrepancies exist—even if your model is listed—do not proceed with the purchase.
  • This product is an aftermarket replacement part and is not an OEM component.
  • Professional installation is recommended to ensure safety and optimal performance.

Why Choose JLM MARINE?

  • Quality Assured: As a trusted manufacturer for over 20 years, we supply top marine brands globally.
  • Fast Global Shipping: Free delivery worldwide in 5–15 days.
  • Direct from Manufacturer: Competitive pricing without compromising quality.
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 80423614829

Discover Niche Categories That Outsell

Top-Converting Item to Boost Your Average Order

4.8 ★★★★★
Based on 18 reviews
Sort
Highest Rating
Newest First
Oldest First
Product Reviews
A
Verified Purchase
Amazon Customer
Boise, US
★★★★★ 4
Good Shelves
Color: B. Rustic Brown - Americana Farmhouse Style, Number Of Shelves: 3, Size: 22.5inches
These shelves are really nice quality and look as advertised. The hardware included was great quality, metal drywall anchors and good screws. They were easy to install, and make even/level with each other. My only gripe is the price, but I'm very satisfied with the product overall.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 12, 2026
P
Verified Purchase
Patricia G.
Omaha, US
★★★★★ 5
Attractive, easy to install, nicely equipped hardware package.
Color: B. Rustic Brown - Americana Farmhouse Style, Number Of Shelves: 2, Size: 22.5inches
These are pretty doggone nice shelves and I appreciate the fact that they are not made of solid particle board. Yes they are made of an engineered product, but they are lightweight and strong…and look better than particle board products and more costly than their actual price. Easy installation system with the bracket…not fussy like some are. An especially thoughtful touch is the variety of hardware that is included. Also a tiny level for use when installing them. What? …So they can be installed correctly? I was pleasantly surprised by this inclusion.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 29, 2026
S
Verified Purchase
Sara
Whiting, US
★★★★★ 5
Beautiful shelves
Color: B. Rustic Brown - Americana Farmhouse Style, Number Of Shelves: 2, Size: 22.5inches
Great quality shelves, have them in 4 rooms, they are easy to hang up and lightweight, look really nice and keeps room looking organized and clean.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 24, 2026
K
Verified Purchase
Kristal S.
Boise, US
★★★★★ 5
Perfect for a coffee bar
Color: B. Rustic Brown - Americana Farmhouse Style, Number Of Shelves: 3, Size: 15.7inches, Color: B. Rustic Brown - Americana Farmhouse Style, Number Of Shelves: 3, Size: 15.7inches
These are great for my coffee bar! These shelves are easy to install and came with all the hardware needed. What a great value for your money, especially when you get 3 of these cute shelves. I love how they help organize my coffee bar area and the size fits perfectly.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 26, 2026
S
Verified Purchase
Saved
Boise, US
★★★★★ 4
If the set screws were white the shelves would be perfect.
Color: C. White - Modern Minimalist Style, Number Of Shelves: 3, Size: 15.7inches
I'd give 4 1/2 if there was one. The shelves thwmself are nice I just don't like the visible little black set screws. The shelves themself look great and are not wobbly at all if you install correctly. I purposely installed the bracket upside down because of the little black setting screws; I didnt want them showing because the shelves are above eye level and the screws are black and I didn't want them showing. But that made the shelf lean amd wobbly so I turned them back over the way they are supposed to be and that made them level and sturdy. I guess I'll paint the little screws.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 21, 2026

recommand products