Imtra Learning Center

Imtra’s Learning Center is a great resource for everything you need to know about your boat’s equipment and systems. Everything from product overviews, product comparisons, buying guides, troubleshooting guides, maintenance tips and more can be found here, and it’s always being updated. Be sure to also check out our video library for product demonstrations, how-tos, webinars and much more!




Who” is Side-Power?

Side-Power is the brand name of Sleipner Motor products. Sleipner began as a marine engine and propeller manufacturer in 1908 and has been headquartered in Fredrikstad, Norway ever since. That engineering and metal machining pedigree has been the core of Side-Power’s identity for 112 years. The company continues to be heavily focused on engineering, design and precision manufacturing.

Side-Power Logo

How long has Side-Power been making thrusters?

Sleipner Motors Side-Power transitioned to producing bow and stern thrusters in 1985, having identified the market need as pleasure yachts increased in size and number. Since that time, Side-Power has delivered over 250,000 thruster units to date. While the majority of the volume has been aimed at the pleasure marine market, the Commercial market is a key part of their business.

Are they suitable for the commercial market?

Side-Power services both the pleasure and commercial marine markets with a product line that overlaps the two. Side-Power dominates the pleasure marine market (outselling all others combined) primarily because of their reliability and performance. The same quality characteristics apply to the commercial grade Side-Power thrusters. Producing a high volume of thrusters requires precision tooling in both production and quality control, and this directly benefits the commercial segment in terms of product innovation, precision manufacturing, and enabling a large engineering and R&D department.

Side-Power designs and manufactures the vast majority of the thruster components in-house, with a direct focus on core processes that are essential and critical for quality and reliability. All thrusters are assembled and fully tested at their factory in Norway. Side-Power continually reinvests in product design, precision manufacturing tooling and measuring/QC systems using the latest technology. So, their success in the high-volume pleasure marine market provides the resources for high quality manufacturing tooling, procedures, and technology development which directly benefits the commercial products.

Side-Power Thrusters Ferry

What benefits do Side-Power thrusters offer the commercial user?

Side-Power thrusters provide the most thrust output per input power (thrust/hp) of any thruster on the market. This is due to the highly engineered hydrodynamic gearleg which provides minimal turbulence, and minimal cavitation. The gearlegs are smooth, streamlined and occupy far less area in the tunnel than others (up to 50% less) which means much greater water flow through the tunnel with far less cavitation. The result is more power, less loss and greater efficiency.

Does Side-Power only make thrusters?

In addition to thrusters, Side-Power offers a complete hydraulic system to power the thrusters for virtually unlimited run time in harsh environments, as well as CANbus based proportional control systems or on/off control of the thrusters. Side-Power thruster systems can be combined with joystick controllers featuring station-holding. Side-Power also produces revolutionary “anyspeed” “Vector” Fin Stabilizer systems for vessels between 55 and 130 feet, providing excellent stabilization both underway and at rest.

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