Volvo Penta Sterndrive seals

Volvo Penta Sterndrive seals seal critical transitions in the Z-drive and transom area and prevent water and oil loss. Precisely fitting seal kits, O-rings and housing seals according to reference number, engine type and drive series ensure reliable sealing of shaft, bearing and flange surfaces. The right seal selection optimizes performance, reduces damage and supports long-term operational reliability in maritime applications.

Function & importance of the star drive seals

Sterndrive seals are central components in Volvo Penta's Z-drive that ensure sealing between moving and stationary components. They prevent both water ingress into critical assemblies and oil leaks between the gearbox, drive and mirror plate. An intact sealing system protects bearings, shafts and internal components from loss of lubricating oil, corrosion and premature wear.

Types of seals in the Z-drive

Various seal types are used in the Sterndrive range, including

Housing seals / flange seals - seal larger contact surfaces between drive components
O-rings / round seals - seal gaps, bushings and shaft connections
Simmerrings / shaft seals - prevent water and lubricant leaks on rotating shafts
Complete seal kits - bundle all relevant sealing elements for an overhaul

Each seal plays a role in the interaction of water, oil and motion sealing in the Sterndrive system.

Selection by OEM reference number

The most reliable assignment is made using the OEM reference number of the old part or from the parts catalog. Even small deviations in diameter, cross-section or material can prevent a seal replacement or lead to leaks.

Recommended selection logic:

Check OEM reference number
Identify drive series (e.g. SX, DPS, DPS-G, DPH, DPR)
Match engine type & year of manufacture
Select suitable gasket(s)

This will ensure that all sealing surfaces are sealed correctly and no leaks occur.

Accuracy of fit: Drive series & year of manufacture

Volvo Penta Sterndrive seals vary depending on:

Drive series/Z-drive variant
Year of manufacture & serial number
Housing and shaft geometry

Only OEM-compatible seals ensure a precise fit, stable installation and permanent sealing effect across all pressure and temperature ranges during operation.