Add to favourite sellers. Details: new pump + back gasket. Water Pump for Yanmar Engines. 3TNA72 3TNA72L 3TNV72 3TNE74 3TNA68 3TNA70 3TNA74 YM486. We have over 25 years experience in specialising in the supply of Diesel Engines and Diesel related products. Our areas of expertise for over 25 years.