Reversible Motor
Mabuchi Motor Co., Ltd.
New product
Manufacturer: Mabuchi Motor Co., Ltd.
Associated Part Reference: Bosch P/No. 158098-7200
Country of Origin: Japan
Product Type: Reversible AC Motor
Marine Application: Small actuator drive motor for dampers, shutters, ventilation control, louvers, and other light-duty automation or positioning mechanisms onboard ships
The motor shown in your photo is a Reversible Motor, Type SLE-F4, manufactured by Mabuchi Motor Co., Ltd., with Bosch P/No. 158098-7200 clearly marked on the nameplate. The label also shows the basic electrical and speed data:
This is a small reversible AC motor used where a mechanism needs to move in two directions—for example open / close, up / down, or clockwise / counterclockwise. In marine service, motors of this type are commonly used inside ventilation damper systems, small actuators, shutter assemblies, or compact automation mechanisms rather than as propulsion or heavy machinery motors.
Because it is a reversible motor, it can drive a shaft in both directions depending on the control wiring or control signal arrangement. That makes it useful for positioning dampers, moving flaps, adjusting air-control mechanisms, or operating small mechanical linkages in marine HVAC and automation systems.
The SLE-F4 is a compact reversible motor designed for applications where a small output shaft must move a mechanism back and forth. Unlike a standard single-direction motor, a reversible motor is intended for bi-directional operation, allowing one motor to both open and close a device or move it between two positions.
In marine systems, a motor like this may be found in:
Because the label shows a 4W output and a relatively modest current draw, this is clearly a light-duty control motor, not a pump motor or heavy machinery drive.
The motor is designed to rotate in both directions, making it suitable for open/close or forward/reverse control.
With 4W output, it is suitable for small marine mechanisms rather than high-load applications.
The label indicates 115V 50/60Hz, which is common in equipment designed for international machinery and control panels.
The nameplate shows Bosch P/No. 158098-7200, which is useful for spare-parts identification when sourcing a replacement.
Its size, shaft arrangement, and reversible design make it appropriate for airflow-control and positioning mechanisms in marine automation.
A reversible motor of this type generally consists of:
From the label, the motor uses 2.0 µF capacitor-related operation, which is typical for small AC reversible motors designed for smooth starting and directional operation.
The Bosch / Mabuchi SLE-F4 reversible motor can be used in a variety of small shipboard automation mechanisms, depending on the original equipment builder’s design. Typical marine applications may include:
If this motor was supplied as part of a Bosch-linked assembly, it may also be integrated into a packaged actuator or equipment subsystem rather than being used as a standalone motor.
Possible causes: no 115V supply, broken lead wire, failed winding, capacitor fault, seized shaft.
Checks: verify incoming voltage, inspect lead wires, test winding continuity, and check whether the shaft turns freely.
Possible causes: wiring issue, faulty reversing circuit, damaged winding path, failed switch / relay in control box.
Checks: inspect directional control wiring and verify whether the motor receives the correct reverse command.
Possible causes: seized bearing, mechanical jam in the driven device, weak capacitor, internal winding issue.
Checks: disconnect the load if possible and test the motor independently.
Possible causes: overload, blocked mechanism, continuous stall condition, wrong voltage, capacitor problem.
Checks: verify the driven damper / actuator is not jammed and confirm the motor is not being held energized too long against an end stop.
Possible causes: capacitor degradation, supply issue, worn internal components, mechanical drag in the connected mechanism.
Checks: verify the capacitor value and inspect the mechanical load side.
Because small reversible motors are often part of a larger actuator assembly, it is a good idea to photograph the mounting face, shaft length, and wiring arrangement before ordering a replacement.
Ships still use small reversible motors like the SLE-F4 because many marine ventilation and automation systems are designed around simple, reliable, low-power motorized mechanisms. Instead of replacing a complete actuator assembly, operators often replace only the failed motor and keep the original control system in service.
It is a small reversible AC motor used for light-duty control and actuator applications.
No. Based on the rating and construction, it is a small control-drive motor, typically for actuators, dampers, or similar mechanisms.
The label shows 115V, 50/60Hz.
158098-7200
4W
Please send:
The Bosch / Mabuchi SLE-F4 Reversible Motor is a compact 115V AC reversible motor used for small marine actuator and control applications such as ventilation dampers, shutters, airflow control devices, and light-duty automation mechanisms. With Bosch P/N 158098-7200 and 4W output, it is an important spare part for maintaining older shipboard control assemblies without replacing the full actuator system.
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