U-Joint Spider – Fits Volvo Penta DP-C DP-D DP-E DP-G DPX & MerCruiser Alpha One Gen II Bravo (Replaces 3860232, 865493A01)

Product Details

This U-Joint Spider is an aftermarket replacement designed for Volvo Penta DP-C, DP-D, DP-E, DP-G, DPX stern drive models and MerCruiser Alpha One Gen II and Bravo 1, 2, 3 applications. Compatible with 1998-up Alpha One Gen II, Bravo series, and a wide range of Volvo Penta DP and SP series drives, this cross and bearing assembly ensures reliable power transfer in demanding marine environments.

Directly replaces Volvo Penta 3860232, 854619, MerCruiser 865493A01, 865496A01, 865496A02, 865510T, 865511T, and Sierra 18-6406.

• Complete cross and bearing assembly with clips included
• Fits both MerCruiser and Volvo Penta stern drive systems
• Drop-in replacement for OEM u-joint assemblies

Part Number Matrix

Use this matrix to confirm equivalent references across OEM and aftermarket.

Engine & Model Compatibility

Confirm your engine model/year in the table below.

Technical Specs

Part Type

U-Joint Cross and Bearing Assembly

Application

Stern Drive

Fitment

MerCruiser Alpha One Gen II, Bravo 1/2/3; Volvo Penta DP-C, DP-D, DP-E, DP-G, DPX, SP series

Components Included

Cross, bearings, clips

What's in the Box

• 1 × U-Joint Cross and Bearing
• 4 × Clips

Installation Notes

1. Disconnect the drive unit according to your service manual and ensure the engine is off.
2. Remove the old u-joint by extracting retaining clips and carefully pressing out bearing caps.
3. Clean the yoke bores thoroughly to remove debris or corrosion.
4. Insert the new u-joint cross into the yoke, aligning one bearing cap at a time.
5. Press or tap bearing caps evenly into place, ensuring they seat fully.
6. Install the retaining clips in their grooves, confirming they are secure.
7. Rotate the u-joint by hand to verify smooth operation without binding.
8. Reassemble the drive unit and perform a function test before returning to service.

Troubleshooting & FAQ

How do I know if my u-joint needs replacement?

Common signs include vibration during operation, clunking noises during throttle changes, excessive play in the driveshaft, or visible wear and corrosion on the cross or bearing caps. Inspect the u-joint regularly during routine maintenance.

Will this fit my 1998 MerCruiser Alpha One Gen II?

Yes, this u-joint is designed for 1998-up Alpha One Gen II stern drives and replaces MerCruiser part numbers 865493A01, 865496A01, 865496A02, 865510T, and 865511T.

Is this compatible with Volvo Penta DPX drives?

Yes, it fits Volvo Penta DPX, DPX-S, and DPX-S1 models, as well as DP-C, DP-D, DP-E, DP-G, SX-M, and DPS-M stern drives.

Do I need special tools to install this u-joint?

A press or bearing installation tool is recommended for even seating of the bearing caps. Snap ring pliers and a soft mallet are also helpful for removing and installing retaining clips.

What's the difference between this and the OEM part?

This is an aftermarket replacement built to OEM specifications using comparable materials and tolerances. It provides reliable performance at a more accessible price point.

How often should I replace the u-joint?

Inspect the u-joint annually or every 100 hours of operation. Replace it when you notice play, wear, corrosion, or if it shows signs of binding during rotation.

OEM vs. Aftermarket?

This listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.

Shipping speed & cost

We ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.

Warranty & returns

Covered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused & in original condition). See our policy page or reach out for instructions.

Safety & Important Info

• Verify images/specifications against your original part. If anything differs—even if your model appears compatible—do not purchase.
• This is an aftermarket replacement, not an OEM component.
• Professional installation is recommended for safety and performance.

About Sea Sierra

• Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.
• Fast Global Fulfillment — Free standard delivery to most regions in 5–15 days.
• Manufacturer-Direct Value — Fair pricing without compromising on materials or QC.