Installed in combination with a bow thruster the stern thruster improves boat maneuverability and greatly simplifies berthing, even with larger boats. QL stern thrusters are recommended for boats with inboard engines, with a conventional propeller shaft. They are installed at the stern, with the motor inside the hull and the propeller tunnel outside the transom. The tunnel has a flared inlet and outlet in order to improve flow.
Note! The tunnel is included in the kit.
| Part no. | Control unit | Voltage | Thrust | Motor output | Tunnel diam. internal | Gear housing | No of propellers | Max. boat length, ft |
| 41100823 | 41100812 | 12 V | 59 kg/579 N/130 lbs | 4 kW (5 hp) | 185 mm | bronze | 1 | 39 ft/11.7 m |
| 41100824 | 41100813 | 24 V | 62 kg/579 N/137 lbs | 4 kW (5 hp) | 185 mm | bronze | 1 | 39 ft/11.7 m |