Defever 44 Trawler with Xtreme Heaters Here is a shot of the Defever 44 trawler and the two heaters installed. The photo is looking forward. The heaters are exhausting aft toward the forward end of the engines. The engines are Perkins 6-3544M diesels. –Tom Blanchard Defever 44 Trawler with Xtreme Heaters Extremely helpful facilitating the rapid replacement of my Xtreme heater Purchased Two Xtreme Heaters!