The rising cost of diesel fuel can significantly cut into commercial fishing profits, especially with an inefficient engine. But Mazatlan businessman Jesus Loya realized a nearly $60,000 annual fuel savings after repowering one of his fishing vessels with a new Yanmar diesel. His 69' Rio Elota now stays at sea longer and benefits from fuel savings of over 15% with a Yanmar 6AYM-WST turbo-charged direct injection engine, Yanmar said. With more than 23 years of industry experience…