Airmar: replacement kit for S850 and ST850 sensors. Includes paddlewheel, shaft, 4 O-rings, and valve sleeve. Not for Raymarine ST600 or ST800 models. Read more.
The Paddle Wheel and Valve Kit for ST850 is a thru-hull replacement kit designed for AIRMAR S850 and ST850 speed and temperature sensors. It provides the key internal components required to keep the sensor operating accurately and reliably over time.
Regular replacement of paddlewheel and sealing components helps preserve accurate speed-through-water readings, reduces wear on the thru-hull assembly, and minimizes the risk of leakage. By renewing these service parts at appropriate intervals, vessel owners can extend the operational life of their sensor, maintain dependable performance, and avoid the cost of replacing the complete instrument.
The kit is engineered to match the specific thru-hull design of the ST850, including its secondary screw-down cap, ensuring correct fit and consistent sealing once installed. It offers a practical and cost-effective way to maintain sensor performance and protect the long-term value of the onboard instrumentation.
Replacement paddlewheel assembly: Supports consistent and accurate speed-through-water measurement by restoring proper paddlewheel function.
Renewed sealing components: Helps maintain watertight integrity and reduce wear within the thru-hull assembly.
Designed for ST850 systems: Fully compatible with the thru-hull configuration used by AIRMAR S850 and ST850 sensors.
Cost-effective maintenance solution: Extends sensor service life and helps protect the investment in onboard instrumentation.
Paddlewheel and shaft
Four O-rings
Valve sleeve
