The New Seakeeper 40 replaces the Seakeeper 35

The Seakeeper 40 is the largest Seakeeper product in production to date.


Buy Seakeeper 40 Yacht STabilizer

The Seakeeper 40 is suitable for boats of 85 feet and larger.

Need more information? Contact us now.

$337,800 ( MSRP 2024)

Average install costs vary considerably depending on the vessel so please call or contact us for a quote.

* Not Including applicable Tax, shipping, potential yard and transport fee’s depending on location.

Not sure if you should buy Seakeeper 40 or a different model Yacht Stabilizer?

Check out the information below which should help, but if the Seakeeper 40 doesn’t seem to be the correct model for your needs contact us now for help on making the right choice, or look at information on other Seakeepers on our Seakeeper price page.

Seakeeper 40 in our Fort Lauderdale shop

The Seakeeper 40 replaces the Seakeeper 35 with more efficiency and power.

  • Boat size: 85 feet and larger, and up to 100 tons (200,000 pounds) Note that multiple units can be installed on boats larger than this!

  • Unit weight: 4,074 lbs (1,848 kg)

  • Dimensions: 54 inches length, 55 inches width, and 40 inches height

  • Power: The Seakeeper 35 requires an AC power source to operate

  • Warranty: 2 years or 2000 hours or whichever comes first (with option to extend)

  • Max rated speed: 5,150 RPM

  • Angular momentum at max rated RPM: 40,000 N-M-S

  • Anti rolling torque at max rated RPM: 104,720 N-M

  • Spool-up time to max rated RPM: 70 minutes (5,150 RPM)

  • Spool-up time to stabilization: 49 minutes (4,378 RPM)

  • Power consumption spool-up power: 5,000 Watts Max

  • Operating power: 1,900 - 4,400 Watts (Sea State Dependent)