SKU: 80423614829

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

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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

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Daniel Customer
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★★★★★ 4
pretty good for the price
Color: Brilliant Black, Size: Large
pretty darn good for the price. You can tell its cheap when you feel it and look close but its really not bad. Surprisingly it fit very well. (for reference Im 6' 1.5" 180 pounds and everything fit me good, except the pants that were a little baggy and the vest a little short) but for the price its good. Its nice enough you can wear it out and not feel like your wearing a Halloween costume or something.
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Reviewed in the United States on November 14, 2025
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Gladys perez
Cuba, US
★★★★★ 5
Perfect for such a special occasion
Color: Brilliant Black, Size: Medium, Color: Brilliant Black, Size: Medium
I bought this suit for my son's graduation and was very satisfied. It looks elegant and modern, and the fit was excellent. The fabric is comfortable and of good quality—ideal for wearing for several hours. I received many compliments that day. Without a doubt, a very good choice for important and special events.
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Reviewed in the United States on May 16, 2026
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Jesse
Grantham, US
★★★★★ 5
Feels Tailored, Perfect Fit, Fast Delivery, Zero Complaint
Color: Black, Size: Large
I honestly did not expect this level of quality ordering a suit online, especially on such short notice, but this completely exceeded my expectations. First off, the fit is incredible. The jacket feels like it was tailored specifically for me, it wraps cleanly around the shoulders and arms without being tight, and tapers perfectly at the waist. I still have full range of motion, which is rare for a fitted jacket. The one-button design gives it a modern, sleek look that really stands out. The pants are just as impressive. They fit perfectly, not too tight, not too loose, with a clean, straight fall that looks amazing with dress shoes. The length is spot on, and the overall structure makes it look very polished. I also appreciate the thoughtful details like secure closures, belt loops, and well-placed pockets. The vest was the cherry on top. It fits clean and adds an extra level of sophistication to the whole outfit. Together, the full set gives a very sharp, put-together look without feeling overdone. What really shocked me was the speed. I ordered this late at night and received it the next morning. That alone would have been impressive, but to combine that kind of delivery with this level of quality is next-level. Overall, this suit looks, feels, and fits far better than I expected at this price point. If you're hesitant about buying a suit online, this is definitely one of those rare cases where it absolutely pays off. Highly recommend.
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Reviewed in the United States on March 27, 2026
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Esther
Dallas, US
★★★★★ 3
One piece was true to size and the other wasn’t
Color: Brilliant Black, Size: XX-Large
Looked nice and perhaps decent quality for the price, but one piece fit while the other didn’t, like I forgot which, but either the jacket fit, but the pants were too big or small or vice versa . Had to return it.
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Kristin Chadwick
Louisville, US
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Quality product!!!
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This tuxedo was perfect for the price!!! Quality material!! My son is 5'10" and 145 lbs...the xsmall fit just right!!
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