WASHINGTON IRON WORKS DIESEL ENGINES 12.75 x 16in
Washington Iron Works built twenty-nine engines of this bore and stroke. This size engine appears to be unrelated to earlier 16-inch stroke engines, including 13-inch, 11.5-inch, and the very 10.74-inch bore units. The first engine was sold to the US Maritime Commission for the American ail Line's "WARIMU," in 1940. They also purchased nine other identical six-cylinder engines, all generator sets making 275 KW at 450 RPM. There was also a six-cylinder stationary sold to Columbia Construction Co. the same year.
The first 12.75 x 16 propulsion unit was sold to San Diego Marine Construction for the "SAN MIGUEL." It was generously rated at 465 HP. 1943 was a big year for engines of this size. Three sixes were sold for the YT series tugs and listed with propeller sizes of 66 by 43 inches. In addition, ten eight-cylinder engines of 500 HP were purchased by the US Navy for Russian ships. The following boats also had engines of this size: "BROUGHTON STRAITS," "ELMORE" (we know these two boats), "SHAMROCK," "SUN VOYAGER," "SUN KING," and "YOLANDE BERTIN."
Check out the engine room...