Always Free Shipping—No Minimum Order. Contiguous U.S. orders only. Alaska and Hawaii excluded.
Low stock: 3 left
Couldn't load pickup availability
GT21-TH
Perfect for coastal and offshore fishermen who want traditional sonar and CHIRP ClearV scanning sonar with a stainless steel stem, this thru-hull mount transducer consistently displays clear and crisp fish arches with superior target separation as well as clear definition of structure below the boat.
The CHIRP ClearV element has a power rating of 500 W and operating frequencies of 260/455 kHz. The traditional sonar has a power rating of 600 W and operating frequencies of 50/200 kHz. It includes a built-in fast-response temperature sensor. For hull deadrises less than 25 degrees.
GT21-TH includes an 8-pin transducer with stainless steel stem, fairing block, isolation plate and bushings, mounting hardware and installation instructions. Follow the instructions carefully to avoid damaging your boat.
WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.
Ask the MPO parts team Send a product or fitment question directly to our team. For AI chat, use the Ask the Bosun button.
You’re asking about Garmin GT21-TH Stainless Steel Thru-Hull Transducer with ClearV and Traditional Sonar for Coastal and Offshore Fishing Store SKU: 65533
It worked as is described and it got my uncle‘s fridge back up and running perfectly
Norcold Gas Control
Dennis Johnsen
The Trident Marin Extra Flex Corrugated Wet Exhaust hose works great. I had to replace the old hose coming from the generator muffler to the exhaust pipe going out the hull. The hose needed to be curved and the flex was perfect. Delivery was fast with no issues. Thank you
Trident Marine 2" Extra-Flex Corrugated Marine Wet Exhaust Hose - Sold by the Foot
James Cline
Very pleased with that product
Caliber BunkWrap Kit - Black 16' x 2" x 4" Roll + 4 Caps + HRDW Roll + 4 Endcaps & Stainless Steel Hardware
Gerald
As discribed. Brand new in excellent shape, fast delivery, well made and an awesome price. Super job thanks a million!
The Trident Marin Extra Flex Corrugated Wet Exhaust hose works great. I had to replace the old hose coming from the generator muffler to the exhaust pipe going out the hull. The hose needed to be curved and the flex was perfect. Delivery was fast with no issues. Thank you
J
Caliber BunkWrap Kit - Black 16' x 2" x 4" Roll + 4 Caps + HRDW Roll + 4 Endcaps & Stainless Steel Hardware James Cline
I ordered my product August 30! I have yet to receive it! My shipping cost was over ten dollars ! I could of walked there and picked it up,it would have been faster!
No option for zero stars. I ordered a roll of 6 awg duplex wire and they drop shipped me a cheap, completely unrelated item. Nobody answers emails or the phone.
WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to 
