Model #25..
Our largest & most powerful Hobby Line Steam Engine, features a double acting stationary slide valve cylinder with plenty of low speed torque, 2-1/2 x 6 boiler, reversible, 2 speed pulley and a F-N-R Stephenson link shift lever. Includes 400 watt heater, pop valve, whistle and throttle.

Bore: 1/2" x 5/8" Stroke