COMPATIBILITY CHECK: The skin fitting, blanking cap and display are not included. Confirm the existing fitting is the NASA paddlewheel type and that the display uses the traditional pulsed paddle-log input, not the newer EML-3 electromagnetic system.

Key Features

• ✔ Complete replacement paddlewheel/impeller insert
• ✔ Attached 7 m / approx. 23 ft cable
• ✔ For compatible NASA Marine paddle-log installations
• ✔ Removable insert permits servicing and cleaning
• ✔ Reuses the correct existing NASA skin fitting
• ✔ Genuine NASA Marine spare part

Technical Specs

Part type	Paddle-log impeller / underwater insert
Cable length	7 m / approx. 23 ft
Sensor type	Mechanical paddlewheel pulse sensor
Skin fitting	Not included
Display	Not included
4Boats SKU	523-UNDERWATER
NASA reference	Impellor unit without skin fitting

Compatible system type: NASA Marine traditional through-hull paddlewheel log installations, including compatible Clipper Log/Clipper Duet, Target Log and Cruiser Log systems that use the same NASA paddle-log insert and pulse input.

Existing skin fitting: this listing does not include the through-hull housing. Confirm the current fitting accepts the NASA paddle-log insert and that its O-rings, cap threads and bore are undamaged. A separate NASA skin fitting is available if a complete new through-hull installation is required.

Not compatible: the EML-2/EML-3 electromagnetic transducer is a different sensor system. Raymarine or other-brand housings are not confirmed even if the outside appearance is similar.

Installation safety: removing an underwater insert while afloat can admit a significant volume of water. Follow the vessel and NASA procedures, use the correct blanking cap and service the O-rings.