For worldwide parts orders, please email Sarah:

Please include your delivery address, and if unsure of parts required, photos are always helpful!

Once Sarah has processed your order, it will ship from our manufacturing facility in the UK.



Before Shipping and VAT


If sailing further afield, we recommend you carry the Offshore Spares Kit. It includes spares for the common wear points:

  • Vane Cover (#76) – The lightweight ripstock nylon vane covers can last a surprisingly long time, but the sun takes her toll. Be sure to take the vane off when not in use, and store out of the sun.
  • 2 Locking Pins – There are 3 Locking Pins (#60, 61, 62) on the unit, all interchangeable. The Shaft Locking Pin should be changed periodically as it can suffer from metal fatigue while motoring. It’s a good idea to rotate the pins from time to time. The Locking Pins supplied in the Offshore Spares Kit are made of Super Duplex stainless steel – 3x stronger than 316.
  • Drive Sleeve (#19) – will develop grooves and may need replacement after 15,000nm or so.
  • Shaft Bottom Bearing (#25) – may show signs of wear after 15,000nm or so.
  • Spare M10 x 65 Bolt Sets, Grub Screws, and Axel, and Knob (for Vane or Axis). Please note that both Metric and Non-Metric grub screws are supplied with the kit.
    • Pre 2016 – use Imperial (3/8” x ½” Set Screws)
    • Post 2016 – use Metric (M10 Set screws)
Part NamePart #GBP £EURO €USD $CAD $
Cover - Vane (Standard, Stubby, XT)#768096116140
Locking Pins (2) Super Duplex#61, 62 (interchangeable)28344050
Drive Sleeve#192344
Bottom Bearing#2522263138
Small Parts (Axel, Axel Screws, Bolt Sets, Knob)#47, #40, M10x65, #3215182227
TOTAL with Discount for Complete OSKAll Parts only124150181220



Before Shipping and VAT

Part NamePart #GBP £EURO €USD $CAD $
Backing Plate Kit (new)#9519232834
Bottom Collar (stainless steel) #2619232833
Bottom Collar (old - plastic)#269101215
Con Rod & Bobbin Upgrade Kit#3, 17, 50, 57, 6397117141171
Cover - Vane (Standard, Stubby, XT)#768096116140
Cover - Drive Unit607287105
Flagstaff Holder#75E42506073
Frame Case Cover#7933404858
Frame Case Screws#21112
Frame Case Cover with LED Stern Light#79 LED102123148179
Knob - AXIS (Old Style 3/8")#3312141721
Knob - Vane or Axis (post 2016 Metric)#33 or #3267911
Knob - VANE Kit - Metric Retrofit#32, 379111316
Locking Pin - Super Duplex#60, 61, 62 (same)14172025
Mounting Pad - Plastic100P, 100PS, 106P, 111P (pair)42506174
Mounting Pad - Teak100T, 100TS, 106T, 111T25303644
Ratio Knob Kit#21, 5611141720
Tiller (Black Plastic) - comes with Drive Unit#23, 4123283340
Tiller Extension (Aluminium Rod)#23E30364352
Hydrovane's Watt&Sea Mounting Bracket (pair)389467564680
XT 'Extendable' Vane544653789952

SHAFT Bearing Kit

Before Shipping and VAT

Bearings also sold separately


Please advise if shaft outer diameter (OD) is 1 ¼” / 31.75 mm or the older 1 1/8″ / 28.575 mm. Measure at the bottom section, where the rudder fits on.

When ordering bearings, it is helpful for us to know the vintage of the Shaft Assembly. If you do not know the age, you may have to remove the shaft to measure the inside diameter (ID) of the outer tube – here is a guide:

  • Pre 2002
    • 1 1/8″ / 28.575 mm shaft – tube is 46.8 mm ID
    • 1 ¼”  / 31.75 mm – tube is 44.4 mm ID
  • Post 2002 – all shafts are 1 ¼” / 31.75 mm – tube is machined inside to 46 mm ID

The Mid-Bearing (#24M) and stainless Bottom Collar (#26) are only available for post 2002 shaft assemblies. For 1 1/8″ Shaft we have a delrin Bottom Collar (#26).

Part NamePart #GBP £EURO €USD $CAD $
Shaft Race Collar & Pin#27, 2810121417
Shaft Ball Race (19 Ball Bearings)#314456
Shaft Top Bearing#249111316
Shaft Mid Bearing #24M14162024
Shaft Bottom Bearing#2522263138
Shaft Bottom Collar - Stainless#2619232833
Drive Sleeve#192344
TOTAL 7995115139

Upgrading Parts

‘To-do’s’ if you wish to refurbish an older unit:


  • All Shaft Bearings, including the new Mid-Bearing (#24M). We discovered that, at speed, the shaft could flex a bit to cause the bottom bearing to crimp and stick – not long enough to be noticeable, unless you are watching for it. The Mid Bearing, included in shaft assemblies after 2008, is made of PTFE and solves the sticking. It is a definite improvement especially for faster boats with longer shafts.
  • Bottom Collar (#26) – now made of ‘316’ stainless steel for the 1 ¼” / 31.75mm shaft. Solves all prior issues of cracking plastics.
  • Vane Knob (#32) and Axis Knob (#33) – new versions, since 2005, are far tougher and improved with a nyloc nut to prevent the knobs from spinning off (a problem with the old knobs). Now available in kits that include the additional parts that were probably lost when the original knob fell off – assuming a lost knob is your problem.
  • Improved Bobbin & Con Rod Assembly – In the spring of 2010 we improved the design by eliminating the Con Rod Top Casting (#68). The Con Rod now fits directly into the Bobbin. The fit is tighter making the system more responsive and it is stronger – way stronger – 33 times stronger.
  • Other Drive Unit Upgrades – If keeping an older VXA2 Model, a matching upgrade would also include new lead weights (now properly balanced for light air performance), tiller (less prone to break or come loose), drive sleeve (tighter), and axis disc (altered to provide a bit more action – not easy to replace).
  • Rudder – We keep improving the rudder:
    • In 2006 the length was increased by 5.5 inches/14 cm
    • In June 2009 it got thicker by adding 5 lbs./2.3 kgs. – now weighs 23 lbs./10.5 kgs (half that in water)
    • The latest version (introduced in the summer of 2009) was developed by our in-house engineer, Ted Hargreaves. Ted inspired the upgrade based on his aeronautical experience with foils. After the first test Ted reported it was much more powerful but so light to the touch – easy to control – couldn’t believe that it could be that good while also being so very stable. It is a vast improvement. We strongly recommend the upgrade for any owners with older versions of the rudder who would like the extra power.
  • Shaft (#29) – now standard (since January 2009 or so) is a ‘super duplex’ steel shaft:
    • Nearly three times as strong as the old ‘316’ version!
    • This shaft is a ‘must’ for today’s rudder
    • To determine which shaft you have look at the bottom: the old ‘316’ version has a rounded radius at the bottom. Most of the new ‘super duplex’ ones have a straight 15 degree taper. The true test is to put a magnet on the shaft – ‘316’ is NOT magnetic but the SD is magnetic.
  • ‘A’ Bracket ‘Shaft Clamp Section – all parts on the outboard end including the 3 castings:
    • In the fall of 2013 we introduced an improved ‘A’ Bracket. The old version was quite flexible but the arms were rigid at an angle of 40 degrees.
    • The arms can now be set at any angle from 40 degrees to 80 degrees – making our most flexible bracket even more flexible.

Please consider all of the above if looking to purchase a used unit

We only produce parts for the current model – since 1986.