REDUCED TINNITUS
The Australian or Army Work Boat (AWB) of World War II was the most popular displacement hulled work boat of its time, and some are still available. Measuring 12.19m long by a beamy 3.96m wide and drawing 1.22m, this launch was powered by the GM 6-71. For a restoration job, Google search 'Sydney Harbour Boat Builders work on AWB 433.'
Originally released in 1938, the 7L straight six supercharged two-stroke 6-71 stayed in production until 1997 until it was phased out due to non-compliance with exhaust emission requirements. In the AWB the engine was rated at a continuous operating output of
