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    Fulfilling Tomorrow's Needs Today

Wärtsilä proudly introduces EvoTube®.

Our latest breakthrough in Shaft Line technology, poised to redefine efficiency and environmental responsibility in marine propulsion systems.

EvoTube®: Fulfilling Tomorrow's Needs Today

Wärtsilä introduces EvoTube®, a revolutionary and patented advancement in Shaft Line technology for marine propulsion systems, reducing risk and simplifying operations. While based on a conventional stern tube, the EvoTube® is a significantly simplified system with fewer components than a conventional stern tube system. The inboard seal is mounted directly on the aft bearing housing, and the forward bearing is replaced with a standalone bearing inside the engine room. Its intelligent design optimises space utilisation and eases maintenance tasks.

The EvoTube® concept is suitable for both oil and water lubrication systems, also facilitating future conversion from oil to water lubrication systems, effectively environmentally future-proofing vessels anytime during the vessel’s operational life.

EvoTube® Benefits for Owners/Operators


  • Suitable for oil & water lube systems.
  • Simplified system – no forward stern tube bearing means less that can go wrong & less maintenance.
  • Low risk, based on existing technology.
  • Frees up valuable cargo space.
  • Easier future modification from oil to water lubrication.
  • Permits easier maintenance of equipment onboard.

Oil lubrication

  • Stern tube lubrication oil was reduced by ~90%.
  • Improved through-life quality of the stern tube oil due to simplified oil maintenance during operation.
  • Simplified oil management during maintenance of the Stern tube seals.
  • Can modify from oil-lubrication to water-lubrication.

Water lubrication

  • Eliminates shaft corrosion – no shaft coatings are required as for conventional water- lubricated stern tubes.
  • Enables full in-water serviceability including aft bearing replacement.
  • Compact design, free’s up valuable cargo space and permits easier maintenance of equipment onboard. 
EvoTube® EvoTube®

“I'm thrilled to announce EvoTube®—a game-changer in marine propulsion. Wärtsilä's commitment to innovation shines through in this technology, offering shipowners and operators an environmental future proof option of seamless transition from Oil to Water. EvoTube® is not just a product; it's a testament to our dedication to advancing the maritime industry with cutting-edge solutions that simplify operations while minimizing environmental impact."

Rob Burford, VP Wärtsilä Shaft Line Solutions

How can we help?

Contact our 24/7 customer support at sls247@wartsila.com for assistance with solutions related to the shaft line.

To enable prompt response, please indicate the Equipment Serial Number or the name of the vessel. Equipment Serial Number is taken from the equipment nameplate and includes all letters and numbers as given on the equipment nameplate.

For all other enquiries, please fill in the online form. Fields indicated with an asterisk (*) are required. We aim to respond within 1-2 business days depending on the scope of your enquiry.

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