Keep on Fishing with Xtreme Xtreme Heaters has Xtreme pride in the quality of their product and Xtreme loyalty to their customers. In our part of Florida, cold weather comes a couple of times each year but winterizing isn’t an option because we fish year-round. The Xtreme Heater is the perfect solution to keep our single screw diesel ready to go and with customer service way beyond what might be expected, we’ve found the winning combination. Thanks for your great service! Good Product!