Aluminum alloy piston with built-in steel struts are lightweight to reduce connection rod bearing loads and provide good heat transfer characteristics.Direct fuel injection on the 2032R injects fuel on top of the pistons and allows for more efficient combustion and fuel economy.Indirect fuel injection on the 2025R uses a pre-combustion chamber to give the engine a smooth and quiet operation.Economical cast-in block cylinder design for good cooling and long life.Yanmar TNV Series engine offers these features:
