Volvo Penta Upper Gear Housing Flange Screw 3888122
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Volvo Penta Upper Gear Housing Flange Screw — Part No. 3888122
| Part Number | 3888122 |
| Brand | Volvo Penta |
| Product Type | Flange Screw / Sterndrive Fastener |
| System | Sterndrive — Upper Gear Housing & Shift Mechanism |
| Diagram Position | Upper gear housing and shift-mechanism assembly; typically installed in groups of 4–5 depending on position |
| Supersedes | 990859 → 3888122 |
| Later Service Reference | 21906721 (later diagram service number — verify current EPC status before substituting) |
| Weight (estimated) | 0.05 kg |
This is the OEM flange screw for selected Volvo Penta SX-A, DPS-A, and DPS-B sterndrive assemblies. Part 3888122 appears at multiple positions within the upper gear housing and shift-mechanism exploded views, so it must be matched by diagram position — not by screw appearance alone.
Compatible Applications
Diagram-confirmed applications:
- SX-A sterndrive — upper gear housing and shift-mechanism assemblies
- DPS-A sterndrive — upper gear housing and shift-mechanism assemblies
- DPS-B sterndrive — upper gear housing and shift-mechanism assemblies
Broader references also associate 3888122 with selected FWD and transom-shield applications, and later Volvo Penta V6/V8 installations using these drive systems. Confirm from the drive-specific exploded diagram.
Fitment Notice
Volvo Penta uses several flange screws in the same upper gear housing, including 990859, 3888122, 21906721, and 990860, depending on production revision and fastener location. Always confirm the exact drive model, serial number, and exploded-view diagram position before ordering.
When to Replace
Replace this flange screw if you find:
- Damaged or stretched threads
- Rounded or damaged drive head
- Severe corrosion on the fastener or flange seating surface
- Evidence of over-tightening
- Removal from an assembly where the Volvo Penta service procedure specifies one-time-use replacement
Installation Notes
Inspect mating threads and the flange-contact surface before installation. Because 3888122 appears at several different drive locations, use the torque specification for the specific assembly being serviced — not a generic fastener torque. On upper gear housing assemblies, this screw is installed alongside the upper cover, gasket, bearing carrier, and related housing hardware.
Superseded / Alternate Part Numbers
- Earlier: 990859
- Current OEM (this part): 3888122
- Later service reference: 21906721 — verify via Volvo Penta EPC before substituting
Parts Desk Insights
Best use: Order 3888122 when your drive diagram confirms this part number at the specific fastener position being serviced. This screw is the right choice for upper gear housing and shift-mechanism service on SX-A, DPS-A, and DPS-B drives where the diagram calls out 3888122.
Common customer issue: Buyers sometimes order by screw appearance or a generic size rather than matching the OEM number and diagram position. Because multiple flange screws are used in the same housing at different positions, using the wrong fastener can result in improper torque retention or sealing. Always cross-reference the exploded view for the exact position you are servicing.
Shipping information
In-stock and OEM parts: ship same or next business day.
Supplier-stock items are usually ready for pickup or shipping within 24 hours of ordering.
Special-order timing may vary.
Returns & warranty
Returns & Satisfaction Guarantee
We stand firmly behind the quality of every product we sell. Your confidence matters to us — and we back it with a straightforward 30-Day Satisfaction Guarantee.
If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
To qualify for a return:
Item must be in new, unused condition
Product must be in its original packaging
All parts, components, hardware, manuals, and accessories must be included
Packaging must be undamaged and suitable for resale
Important:
Electronics are strictly inspected. No returns on open-box electronics. Exceptions may apply only with prior written approval. Any electronic unit that has been installed, powered, activated, or altered may not be eligible for return.
We are serious about product integrity — and equally serious about taking care of our customers. If there is ever a product issue, contact us immediately so we can make it right.
For return authorization, please contact our support team before shipping anything back.