Airmar 33-493-01 Paddle Wheel Spares Kit For S800 ST800

The Airmar 33-493-01 Paddle Wheel Spares Kit For S800 ST800 is an essential maintenance component for operators relying on Airmar's proven speed and depth transducer systems. This kit exists to extend the service life of your marine instrumentation by providing all wearing parts in a single, coordinated package—eliminating the guesswork of sourcing individual components and ensuring compatibility with your existing S800 or ST800 paddle wheel assembly. For marine mechanics and boat owners who demand reliability in rough conditions, having OEM-spec spares on hand prevents costly downtime and maintains accurate hull speed and water depth readings.

The kit includes a complete paddle wheel and shaft assembly, two precision O-rings engineered to withstand saltwater and freshwater environments, a valve sleeve that regulates water flow through the transducer head, and a retaining ring that secures all internal components under dynamic pressure. These parts work together to maintain the seal integrity and rotational accuracy that Airmar's transducers demand; degraded O-rings or a worn paddle wheel directly compromise speed and depth data reliability. The paddle wheel design is optimized for laminar flow and minimal turbulence, so worn components don't just leak—they introduce signal noise and calibration drift that can mislead navigation systems.

This spares kit is designed specifically for S800 and ST800 models and is not interchangeable with the ST600 line, making part selection critical during ordering. Marine technicians, charter captains, and recreational boaters operating in saltwater environments benefit most from preventive replacement during seasonal haul-outs or after extended use in heavy weather. Installation requires basic mechanical skill and typically takes 15–30 minutes with standard hand tools; refer to your Airmar transducer manual for step-by-step procedures. Keeping a spare kit aboard or in your service locker ensures you're never stranded with inaccurate speed data or silent depth readings.