Overview

The Garmin 010-12117-08 is a replacement 3-blade propeller for Garmin gWind wind transducer installations, including systems that use a GND 10 interface.

On a masthead wind sensor, the propeller is what the transducer uses to measure wind speed. If the propeller is missing, chipped, or not spinning freely, wind speed can drop to zero, lag behind gusts, or read inconsistently. Replacing the propeller restores the rotating element so the transducer can read wind speed normally again.

Key features

• Replacement propeller for Garmin gWind wind transducer setups, including those paired with GND 10.
• 3-bladed rotor used for wind-speed sensing on the gWind twin-fin style transducer.
• Addresses common issues after loss, impact, or binding that can cause wind-speed dropouts or erratic readings.
• Practical spare to keep aboard for boats that depend on masthead wind data for instruments and sailing displays.

Compatibility and fit

This is a wind transducer propeller, not a propulsion propeller for an engine or trolling motor. It is intended for Garmin gWind wind transducer hardware found at the masthead. Confirm your boat has a gWind transducer before ordering.

If your installation includes a Garmin GND 10, this propeller still fits the masthead gWind sensor, since the GND 10 is the interface and the rotating element remains on the transducer itself.

Installation and setup

Replacement is typically done at the masthead. Before fitting the new propeller, rinse and wipe the shaft and hub area so salt crystals and grit do not bind the rotor. After installation, spin the propeller by hand to confirm it turns freely and does not rub on the fins.

Once back under way, check that wind speed responds smoothly in light air and ramps up cleanly in gusts. If readings are still inconsistent, inspect the transducer for shaft play or fin damage from the same event that took out the propeller.

Use cases on board

This replacement is a good match for cruising and racing sailboats that rely on masthead wind speed for instrument displays, wind-based sailing decisions, and autopilot wind modes.

It also makes sense as a small spare for offshore passages or regattas, where a missing propeller can take wind speed offline at the worst time.