JOHNSON 540 3 Pole Motor 4.5-15 Volts Suberb value electric motor, ideal medium size model boats. 3 Pole means this motor is quite powerfull and high revving. Operating Voltage: 4.5-15 Volts No Load Speed @ 12Volts: 14724RPM No Load Current @ 12 Volts: 0.45Amps @ Max Efficiency @12 Volts: 12380RPM @ Max Efficiency @12 Volts: 0.52Amps Dimensions (mm) See Drawing A B C D E F G H I J 5.0 13.5 50.0 35.8 68.0 3.17 13.0 35.7 M3 25.0 -