Overview?

The Garmin 010-10279-04 is a transom-mount water speed sensor with a 4-pin plug that feeds speed-through-water data to compatible echo series fishfinders. It uses a paddle wheel to measure boat speed, and the connected display can show that speed reading while you run or troll.

This sensor includes a 30 ft cable and is intended for transom installations where the paddle wheel can stay in clean water flow. It supports transom angles from 0 to 70 degrees, which helps when mounting on a variety of hulls and transom shapes.

Key features

• 4-pin connector for direct connection to compatible Garmin echo series fishfinders
• Transom-mount paddle wheel sensor that measures speed through the water
• 30 ft attached cable for routing from the transom to the helm or console
• Supported transom angle range of 0 to 70 degrees
• Speed data is collected at the sensor and displayed on the connected fishfinder

Compatibility and fit

This is a 4-pin speed sensor for echo series units that accept a 4-pin accessory connection. Common compatible models include echo 200, echo 201, echo 201dv, echo 300c, echo 301c, echo 301dv, echo 500c, echo 501c, echo 550c, echo 551c, and echo 551dv. Confirm the plug style and available connection on your display before ordering.

Installation and setup

Mount the sensor on the transom where the paddle wheel stays submerged at speed but is not directly in the path of trailer bunks, lifting strakes, steps, or heavy turbulence. Take time to route the cable up and away from moving parts and sharp edges, then seal any transom penetrations appropriately for your hull.

Use cases on board

Speed-through-water is useful when you want a steady trolling pace, when you are dialing in lure action, or when you want a speed reference that is not affected by GPS dropouts. It can also help you compare speed over water to speed over ground when current is running.

Maintenance and care

Keep the paddle wheel clear of weeds, barnacle growth, and fishing line, especially after docking for extended periods. A quick rinse after saltwater use and an occasional check for free rotation will help keep the speed reading consistent.

Safety information

WARNING: This product may contain chemicals known to the State of California as potential causes for cancer, birth defects, or other reproductive harm. For more information, visit P65Warnings.ca.gov.