Volvo Penta Propeller Shaft 3857675 - Special Order

The Volvo Penta Shaft 3857675 is an OEM SX lower gearcase propeller shaft for Volvo Penta SX and OMC Cobra SX single-prop sterndrive lower units. It is used in the Propeller Shaft and Bearing Housing diagram group as the horizontal prop shaft, diagram reference 4.

Key Features

• Genuine Volvo Penta propeller shaft
• Part number: 3857675
• Product type: SX lower gearcase propeller shaft
• Diagram group: Propeller Shaft and Bearing Housing
• Diagram reference: 4
• Application: Volvo SX / OMC Cobra SX single-prop lower unit
• Common fitment range: 1994-present Volvo SX-style lower gearcase
• OMC Cobra SX reference range: 1994–1998 single-prop lower unit
• Approximate weight: 6.94 lb
• Aftermarket dimensional reference: 51.5 cm length x 5.5 cm width x 5.5 cm height
• Replaces earlier Volvo Penta shaft 3852271

Application Compatibility

Commonly associated with Volvo Penta SX single-prop sterndrive lower gearcases and OMC Cobra SX 1994–1998 single-prop lower units. This is not a DuoProp shaft and should be matched to the exact lower-unit diagram before ordering.

Serial Number Fitment Notice

Confirm fitment by drive model, serial number, lower-unit style, and prop-shaft/bearing-housing diagram. Prop shafts must match spline count, bearing surfaces, seal surfaces, gearcase style, and propeller hardware arrangement.

When This Part Needs Replacement

Replace the propeller shaft if it is bent, twisted, grooved at the seal surface, corroded, damaged at the splines, causing prop wobble, leaking gear oil through shaft seals, or found out of specification during lower-unit service.

Installation Notes

Install according to the Volvo Penta service procedure for the SX lower gearcase. Inspect the bearing housing, seals, bearings, thrust hardware, carrier components, gears, and propeller hardware before reassembly. A bent or grooved shaft can quickly damage new seals, so inspect the seal running surface carefully.

Alternate/Superseded Part Numbers

Related references include:

• 3857675
• 3852271 — earlier Volvo Penta reference replaced by 3857675
• 3857675-0
• BRP 3852271
• OMC 0778393
• GLM 11154
• EMP 44-03730
• 92-11154
• REC3857675

Parts Desk Insight

The useful match points are SX single-prop lower gearcase, Propeller Shaft and Bearing Housing diagram reference 4, and the supersession from 3852271 to 3857675. Before ordering, confirm this is for an SX-style single-prop lower unit, not a DuoProp gearcase.

⚠️ Special Order — This product is not currently in store inventory but may be available from the Manufacturer. Special Orders may take up to 2 weeks to arrive. Call the parts desk before ordering if you need a closer estimate on delivery time.