Transom Seal Rebuild Bellow Kit for Volvo Penta and OMC Cobra

In this review the Transom Seal Rebuild Bellow Kit is assessed for boat owners who need a complete transom service repair for Volvo Penta SX/DP drives or OMC Cobra stern drives from 1986 to 1993. The bottom line: this kit is best for DIY mechanics or marine technicians seeking a single package that replaces the U-joint exhaust bellows, shift cable bellows, gimbal bearing and outdrive mounting gasket and clamps, offering clear value when the parts match the listed replacement numbers. It is not a precision OEM reproduction in every detail, but it covers the major wear items to restore a sealed transom assembly and reduce leaks.

Key Features

• Comprehensive kit: Includes U-joint exhaust bellows, shift cable bellows, gimbal bearing, outdrive mounting gasket, clamps and water hose so most transom seal jobs can be completed from one box.
• Model coverage: Serves OMC Cobra drives from 1986 to 1993 without cone clutch and multiple Volvo Penta SX and DP drive variants, reducing the need to source separate parts.
• Direct replacement numbers: Replaces parts listed as 3854127, 914036, 911826, 3853807, 508105 and 3841481, which simplifies verification against existing components.
• Gimbal support: The included gimbal bearing addresses a common wear point to maintain proper outdrive alignment and reduce steering play.
• Value proposition: Customers identify the kit as a cost-effective alternative to buying individual items, making it suitable for routine maintenance or staged overhauls.

Who It's For

This kit is aimed at owners of boats equipped with Volvo Penta SX or DP drives and OMC Cobra outdrives from the specified years who are comfortable performing a moderate-level transom service or who work with a mechanic. It is particularly useful for those who want to replace multiple wear items at once without hunting down each part number separately.

It is less appropriate for owners seeking factory OEM fittings with exact manufacturer finishing or for very old or modified drives where dimensions may differ; if exact OEM traceability or bespoke components are required, a specialist parts order may be the safer route.

Pros & Cons

Pros

• Includes most common replacement parts needed for a transom seal rebuild, simplifying repairs.
• Covers a range of Volvo Penta SX/DP and OMC Cobra models, easing compatibility checks.
• Offers clear value for money compared with buying each part separately.

Cons

• Fit and functionality receive mixed feedback, so minor adjustments or verification may be required during installation.

Specifications

Our Verdict

The GHmarine Transom Seal Rebuild Bellow Kit is a practical, cost-conscious choice for boat owners who need to replace multiple transom components at once. It is best for DIYers and mechanics working on the specified Volvo Penta SX/DP or OMC Cobra drives and delivers good value, though installers should verify fit during assembly and expect occasional minor adjustments.

Frequently Asked Questions

Will this kit fit my outdrive?
Check the drive model and year: it is intended for OMC Cobra drives 1986-1993 without cone clutch and Volvo Penta SX and DP variants; confirm by matching the listed replacement numbers.

Does the kit include the gimbal bearing?
Yes, a gimbal bearing is included as part of the comprehensive transom service kit.

Is this an OEM kit?
This is an aftermarket GHmarine kit that replaces the listed part numbers; it offers value but may differ slightly from factory originals.