Overview: Volvo Penta SX & DPS sterndrive systems
The SX and DPS series belong to the classic Volvo Penta Sterndrive systems with Z-drive. The SX-Drive uses a single propeller arrangement and is suitable for compact boats and lighter engines, while the DPS-Drive with DuoProp propellers offers better traction, performance and maneuverability.
Mechanical components & bearings
Spare parts in this category include:
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Shaft Bearings, Needle Bearings and Gimbal Bearings - for stable bearing support
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Propeller shaft seals - for sealing against water and lubricant loss
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Bearing housing components and washers - for mechanical integrity of the drive
Mechanical precision and correct fit are crucial for smooth running and a long service life.
Sealing parts, O-rings & seal kits
Seals ensure tight transitions between housings, flanges and moving components in the Z-drive. This category includes
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Housing seals & O-rings
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Seal kits for star drive housings
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Exhaust and joint bellows
These seals prevent water, oil and air leaks and protect internal components.
Exhaust systems, bellows & hoses
Z-drive specialty parts also include:
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Exhaust bellows & flexible exhaust hoses - for safe exhaust gas routing
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Hinged bellows and protective sleeves - for sealing in the drive base
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Hydraulic and cooling water hoses - for media routing in trim systems
All parts must be compatible with the respective SX or DPS housing.
Hydraulic & trim system parts
Relevant spare parts for trim and steering systems of SX/DPS drives:
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Trim pumps & cylinders
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Hydraulic hoses & fittings
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Sensors & encoders
These components control the drive inclination and improve driving characteristics and handling.
Anodes & protective components
Corrosion protection is crucial in maritime applications. The anodes protect the Sterndrive housing against electrolytic erosion:
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Cavitation plate anodes
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Gimbal plate & transom anodes
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Sets/complete kits for regular maintenance
Anodes should be checked regularly and replaced in good time to prevent expensive damage.
Selection by reference number & year of manufacture
The reference number is the most reliable way to identify suitable spare parts for SX/DPS drives. Parts differ in terms of dimensions, housing shape and connection details, even for externally similar models.
Recommended selection steps:
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Take the reference number from the old part
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Determine year of manufacture & drive variant
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Select suitable parts according to data
A structured allocation reduces incorrect orders and assembly problems.
Installation & maintenance instructions
The following applies when replacing Z drive parts:
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Remove old seals completely
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Clean and check sealing surfaces
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Insert bearings and seals with the correct dimensions
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Observe torques according to specifications
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Check the hydraulics/trim system after installation
Careful assembly extends service life and ensures long-term function.
