The Hatz 1D90 is built for tough industrial applications that need high output from a compact single-cylinder package. The air-cooled design keeps installation straightforward and reduces cooling-system complexity, while the mechanical fuel system suits equipment that prioritises durability and straightforward servicing.

With 0.667L displacement and mechanical direct injection, the 1D90 produces up to 11.0 kW (15.0 hp) at 3000 rpm and 10.0 kW (13.6 hp) at 3600 rpm for variable-speed operation. For constant-speed duties, it’s rated at 10.0 kW (13.6 hp) at 3000 rpm, with additional constant-speed points shown at 7.3 kW (9.9 hp) at 1800 rpm and 6.1 kW (8.3 hp) at 1500 rpm — useful where stable governed-speed output is required.