Volvo Penta Propeller Shaft Roller Bearing 425784 – DPH DPR Drive

Volvo Penta Propeller Shaft Roller Bearing 425784 – DPH / DPR Sterndrive

What This Part Is

Volvo Penta 425784 is a genuine OEM roller bearing identified in propeller shaft and lower-unit applications on DPH and DPR sterndrive families. Current parts references associate this bearing with the lower-unit assembly on DPH-A, DPH-B, DPH-C, DPH-D, DPH-D1, DPR-A, DPR-B, DPR-C, DPR-D, and DPI-A drives. Because bearing fitment within a drive family can vary by production break and lower-unit configuration, confirm the part number against your exact drive serial number before ordering.

Compatible Applications

• Volvo Penta DPH-A sterndrive — propeller shaft / lower unit (verify by serial)
• Volvo Penta DPH-B sterndrive — propeller shaft / lower unit (verify by serial)
• Volvo Penta DPH-C sterndrive — propeller shaft / lower unit (verify by serial)
• Volvo Penta DPH-D / DPH-D1 sterndrive — propeller shaft / lower unit (verify by serial)
• Volvo Penta DPR-A sterndrive — propeller shaft / lower unit (verify by serial)
• Volvo Penta DPR-B sterndrive — propeller shaft / lower unit (verify by serial)
• Volvo Penta DPR-C sterndrive — propeller shaft / lower unit (verify by serial)
• Volvo Penta DPR-D sterndrive — propeller shaft / lower unit (verify by serial)
• Volvo Penta DPI-A sterndrive — propeller shaft / lower unit (verify by serial)

Related Products

• Volvo Penta DPH / DPR Inner Shaft Sealing Ring – 22876829
• Volvo Penta Needle Roller Bushing 984224 – DPH DPR Drive Shaft Lower Unit

Serial Number & Fitment Notice

Bearing fitment on Volvo Penta DPH and DPR drives is highly specific to the drive model, production serial range, and lower-unit configuration. Do not order by appearance or approximate dimensions. Always confirm part number 425784 against your exact drive serial number using the Volvo Penta parts schematic for your specific drive. Volvo Penta specifically advises identifying the engine and drive by serial number when selecting genuine parts.

When to Replace

• Bearing shows roughness, noise, or resistance when rotated by hand
• Excessive radial or axial play detected during lower-unit inspection
• Pitting, corrosion, spalling, or overheating marks on the bearing races or rollers
• Damage found during propeller shaft or lower-unit service
• Proactive replacement when the lower unit is already disassembled and the bearing shows wear

Installation Notes

• Confirm part number 425784 against your drive serial number and the correct Volvo Penta parts schematic before installation
• Inspect the propeller shaft journal and housing bore for wear, scoring, or corrosion before fitting the new bearing
• Install with correct orientation as shown in the Volvo Penta workshop manual for your drive
• Use the appropriate bearing driver or press to seat the bearing — do not strike the bearing face directly
• Check mating shaft and housing dimensions against Volvo Penta service specifications
• Inspect all related seals, including the inner shaft sealing ring 22876829, and replace as needed while the lower unit is apart

Service Interval

Volvo Penta does not specify a fixed calendar interval for this bearing under normal operating conditions. Inspect during any lower-unit or propeller shaft service, at each haul-out where the drive is inspected, or any time bearing noise, vibration, or excessive play is noticed. Replace proactively when the lower unit is disassembled for other service if the bearing shows wear.

Technical FAQ

Can I confirm fitment without the drive serial number?
Not reliably. DPH and DPR drives span multiple production generations and lower-unit configurations. Bearings that look similar may occupy different positions within the same drive family. The drive serial number is required to locate the correct schematic position and confirm 425784 is the right part for your specific unit.

Where is this bearing located in the drive?
Current parts references place 425784 in the propeller shaft / lower unit assembly on DPH and DPR drives. The exact diagram position should be confirmed using the Volvo Penta parts schematic for your specific drive model and serial range.

Should I replace related seals at the same time?
Yes. When the lower unit is disassembled to the point where this bearing is accessible, it is good practice to inspect and replace related seals such as the DPH/DPR inner shaft sealing ring 22876829. This avoids a repeat teardown if a seal fails shortly after the bearing is replaced.

Is 425784 a current Volvo Penta part?
Yes. Volvo Penta’s official parts shop lists 425784 as a current genuine part. No public supersession to a new number has been identified; 425784 remains the primary ordering reference.

Parts Desk Insights

Bearings in DPH and DPR lower units are not interchangeable by eye — similar bearings can sit in different positions within the same drive family and have different load requirements. The serial number is essential here, not optional. The most common issue is a customer arriving with the old bearing in hand and assuming a dimensional match is sufficient; it may look right but be wrong for that housing position. When this part is being replaced, it’s also worth flagging the inner shaft sealing ring 22876829 and the needle roller bushing 984224 — both are in the same lower-unit area and are worth inspecting while the drive is apart.