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

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

Vendor: JLM Marine
Availability: In Stock
Product Type: Bellows Kit
$74.50
$74.50
Subtotal: $74.50

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

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

$74.50
U - Joint Shift Bellows Kit – Fits OMC Cobra (1986 & Later) and Volvo Penta SX/DP Models (Replaces 3854270, 3858631) - JLM Marine Boat Parts Limited
U - Joint Shift Bellows Kit – Fits OMC Cobra (1986 & Later) and Volvo Penta SX/DP Models (Replaces 3854270, 3858631) - JLM Marine Boat Parts Limited
U - Joint Shift Bellows Kit – Fits OMC Cobra (1986 & Later) and Volvo Penta SX/DP Models (Replaces 3854270, 3858631) - JLM Marine Boat Parts Limited
U - Joint Shift Bellows Kit – Fits OMC Cobra (1986 & Later) and Volvo Penta SX/DP Models (Replaces 3854270, 3858631) - JLM Marine Boat Parts Limited
U - Joint Shift Bellows Kit – Fits OMC Cobra (1986 & Later) and Volvo Penta SX/DP Models (Replaces 3854270, 3858631) - JLM Marine Boat Parts Limited
U - Joint Shift Bellows Kit – Fits OMC Cobra (1986 & Later) and Volvo Penta SX/DP Models (Replaces 3854270, 3858631) - JLM Marine Boat Parts Limited
U - Joint Shift Bellows Kit – Fits OMC Cobra (1986 & Later) and Volvo Penta SX/DP Models (Replaces 3854270, 3858631) - JLM Marine Boat Parts Limited
U - Joint Shift Bellows Kit – Fits OMC Cobra (1986 & Later) and Volvo Penta SX/DP Models (Replaces 3854270, 3858631) - JLM Marine Boat Parts Limited

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

$74.50
Description

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

We can ship to virtually any address in the world with free shipping available for most regions.

For our typical US and Canadian customers , our shipping timeframes are as follows:

  • Amazon FBA: orders will be delivered within 1-5 business days after placing the order (during certain special periods such as major promotions, Christmas, etc., the delivery time of Amazon FBA may be affected).
  • US warehouse shipment: orders will be delivered within 5 days after placing the order.
  • China warehouse shipment: orders will be delivered about 12 days after placing the order.

When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.

Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.

About JLM Marine

Founded in 2002, JLM Marine has established itself as a dedicated manufacturer of high-quality marine parts, based in China. Our commitment to excellence in manufacturing has earned us the trust of top marine brands globally.

As a direct supplier, we bypass intermediaries, which allows us to offer competitive prices without compromising on quality. This approach not only supports cost-efficiency but also ensures that our customers receive the best value directly from the source.

We are excited to expand our reach through retail channels, bringing our expertise and commitment to quality directly to boat owners and enthusiasts worldwide.

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