The Fusō-class ships had two sets of Brown-Curtis direct-drive steam turbines, each of which drove two propeller shafts.
The medium-pressure turbines drove the wing shafts while the high- and low-pressure turbines drove the inner shafts.
The turbines were designed to produce a total of 40,000 shaft horsepower (30,000 kW), using steam provided by 24 Miyahara-type water-tube boilers, each of which consumed a mixture of coal and oil.
The ships had a stowage capacity of 4,000 long tons (4,100 t) of coal and 1,000 long tons (1,000 t) of fuel oil, giving them a range of 8,000 nautical miles (15,000 km; 9,200 mi) at a speed of 14 knots (26 km/h; 16 mph).
Both ships exceeded their designed speed of 22.5 knots (41.7 km/h; 25.9 mph) during their sea trials; Fusō reached 23 knots (43 km/h; 26 mph) from 46,500 shp (34,700 kW) and Yamashiro exceeded that with 23.3 knots (43.2 km/h; 26.8 mph) from 47,730 shp (35,590 kW).

During their 1930s modernization, the Miyahara boilers on each ship were replaced by six new Kanpon oil-fired boilers, fitted into the former aft boiler room, and the forward funnel was removed.
The Brown-Curtis turbines were replaced by four geared Kanpon turbines with a designed output of 75,000 shp (56,000 kW).
On her trials, Fusō reached a top speed of 24.7 knots (45.7 km/h; 28.4 mph) from 76,889 shp (57,336 kW).
The fuel storage of the ships was increased to a total of 5,100 long tons (5,200 t) of fuel oil that gave them a range of 11,800 nautical miles (21,900 km; 13,600 mi) at a speed of 16 knots (30 km/h; 18 mph).
The Fusō-class ships had two sets of Brown-Curtis direct-drive steam turbines, each of which drove two propeller shafts. The medium-pressure turbines drove the wing shafts while the high- and low-pressure turbines drove the inner shafts. The turbines were designed to produce a total of 40,000 shaft horsepower (30,000 kW), using steam provided by 24 Miyahara-type water-tube boilers, each of which consumed a mixture of coal and oil. The ships had a stowage capacity of 4,000 long tons (4,100 t) of coal and 1,000 long tons (1,000 t) of fuel oil, giving them a range of 8,000 nautical miles (15,000 km; 9,200 mi) at a speed of 14 knots (26 km/h; 16 mph). Both ships exceeded their designed speed of 22.5 knots (41.7 km/h; 25.9 mph) during their sea trials; Fusō reached 23 knots (43 km/h; 26 mph) from 46,500 shp (34,700 kW) and Yamashiro exceeded that with 23.3 knots (43.2 km/h; 26.8 mph) from 47,730 shp (35,590 kW).
During their 1930s modernization, the Miyahara boilers on each ship were replaced by six new Kanpon oil-fired boilers, fitted into the former aft boiler room, and the forward funnel was removed. The Brown-Curtis turbines were replaced by four geared Kanpon turbines with a designed output of 75,000 shp (56,000 kW). On her trials, Fusō reached a top speed of 24.7 knots (45.7 km/h; 28.4 mph) from 76,889 shp (57,336 kW). The fuel storage of the ships was increased to a total of 5,100 long tons (5,200 t) of fuel oil that gave them a range of 11,800 nautical miles (21,900 km; 13,600 mi) at a speed of 16 knots (30 km/h; 18 mph).
Fusō-class battleship