Volvo Penta Complete Duoprop Gear Housing 22227295 – DPS-B1 DPS-D

Part Number: 22227295
Brand: Volvo Penta
Official Product Type: Complete Duoprop Lower Gear Housing
System: DPS Sterndrive – Duoprop Lower Gearcase
Gearing: 16/30 lower gearset
Final Drive Ratios: 1.95:1, 2.14:1, or 2.32:1 (depending on upper gear assembly)

Overview

The Volvo Penta 22227295 is the genuine OEM complete lower Duoprop gear housing for selected DPS-B1, DPS-D, and DPS-D1 sterndrives. This is a complete lower gearcase assembly — not an empty housing casting. It features spiral-cut propeller shaft splines and 16/30 lower gearing, and is designed to work with compatible Volvo Penta upper gear units to produce final drive ratios of 1.95:1, 2.14:1, or 2.32:1.

The assembly includes an anode, installation hardware, new propeller nuts, and a vertical-shaft splined coupler. It is compatible with Volvo Penta IH aluminum and FH stainless-steel Duoprop propellers.

Compatible Applications

• Volvo Penta DPS-B1 sterndrive
• Volvo Penta DPS-D sterndrive
• Volvo Penta DPS-D1 sterndrive

The lower housing supports several final drive ratios — the upper gear assembly determines the completed drive ratio. Confirm the exact drive model, upper gear ratio, serial number, and propeller spline configuration before ordering.

Serial Number & Fitment Notice

This housing is specifically associated with the 16/30 lower gearset. Related Volvo Penta lower housings with 17/29 gearing are different assemblies and must not be interchanged by appearance alone. Confirm drive model, upper gear ratio, and serial number against the applicable Volvo Penta DPS parts diagram before ordering. At this price point, fitment confirmation before purchasing is essential.

Kit Contents

• Complete lower Duoprop gear housing (16/30 gearing, spiral-cut propeller shaft splines)
• Anode
• Installation hardware
• New propeller nuts
• Vertical-shaft splined coupler

Related Part Numbers

• 22227295 — current complete 16/30 Duoprop lower gear housing
• 22227298 — earlier ratio-specific complete gear housing; later references show replacement by 23290087
• 22227300 — earlier ratio-specific complete gear housing; later references show replacement by 23290085
• 21658888 — related 17/29 lower housing for 1.78/2.11 configurations; different gearing, not interchangeable

Dimensions & Weight

Approximate weight: 20 kg (complete lower gearcase assembly). Exact dimensions are not published in current Volvo Penta accessory literature. Confirm by part number and serial number match to the applicable DPS drive diagram.

When to Replace

A complete gear housing replacement may be required after severe gear failure, impact damage, cracked or heavily corroded housing, damaged propeller shafts or splines, internal bearing failure, or extensive water intrusion that makes rebuilding the original lower unit impractical.

Installation Notes

Before installation, inspect the upper unit vertical shaft, mating splines, seals, mounting surfaces, and shift mechanism. Use Volvo Penta-specified synthetic SAE 75W-90 gear oil and follow the applicable DPS workshop procedure for mating the lower housing to the upper unit. Verify propeller hardware and fill the drive with the correct quantity of lubricant before operation.

Related Parts

• Volvo Penta Lower Gear Housing O-Ring SX-A DPS 3889786 — O-ring for the DPS lower gear housing mating surface
• Seachoice Anode Kit – Volvo Penta DPS/SX-A Drives, Aluminum — anode kit for DPS sterndrive corrosion protection

Technical FAQ

Q: Is 22227295 a complete assembly or just the housing casting?
A: It is a complete lower gearcase assembly, including the anode, installation hardware, new propeller nuts, and vertical-shaft splined coupler — not an empty casting.

Q: What final drive ratios does this housing support?
A: The 16/30 lower gearing in 22227295 supports 1.95:1, 2.14:1, and 2.32:1 final drive ratios depending on which upper gear assembly it is paired with.

Q: What is the difference between 22227295 and the 17/29 housing (21658888)?
A: Different lower gearing. 22227295 uses 16/30 gearing for 1.95–2.32:1 ratios. 21658888 uses 17/29 gearing for 1.78/2.11 configurations. They are not interchangeable.

Q: What gear oil does this assembly require?
A: Volvo Penta synthetic SAE 75W-90 gear oil. Follow the DPS workshop procedure for the correct fill quantity and procedure.

Q: How do I confirm this is the right housing for my drive?
A: Confirm by drive model, upper gear ratio, and serial number using the Volvo Penta DPS parts diagram. Contact us with your drive serial number before ordering — at this price point, fitment confirmation is essential.

Parts Desk Insights

22227295 is a complete Duoprop lower gearcase — not an empty housing casting. Its key advantage is that the same 16/30 lower assembly can be combined with the appropriate upper gear to produce 1.95, 2.14, or 2.32 final ratios. Confirm the existing drive identification and upper ratio before ordering. At $11,800, do not process this order without serial number and drive model verification. Also confirm whether the job requires only the lower housing or a complete drive unit — in some cases a complete drive replacement is more practical than a lower housing swap.