Replacement Products for ST-125 and TQ-125

After many years of service, the Woodward ST-125 and TQ-125 small engine controls are being replaced by more advanced products that have more features, are more reliable and longer-lasting, and often cost less.

Here are the replacement items for your engine:

ST-125

L-Series Speed Controller replacement part numbers are:

• 8404-5003 L-Series Controller, 10-32 Vdc
• 8923-1253 Installation Kit (includes 8404-5003 L-Series Controller)
• 8928-396 Electrical Connector Kit
• Manuals 26250 and 26187

OR

DPG Speed Controller/DYNA 70025 Actuator replacement part numbers are:

• DPG-2223-001 DPG Controller, 9-30 Vdc
• DC70025-003-012 DYNA 70025 Actuator, 12 Vdc
• DC70025-003-024 DYNA 70025 Actuator, 24 Vdc
• Manual 36522

TQ-125

L-Series Speed Controller replacement part numbers are:

• 8404-1004 L-Series Controller, 10-32 Vdc
• 8923-1163 Installation Kit (includes 8404-1004 L-Series Controller)
• 8928-396 Electrical Connector Kit
• Manual 26250

Options

• Link to optional accessory part numbers (such as available linkage and levers).
• Link to software download page (software for the L-Series and DPG is available on our website for download—does not require a password or extra fees). Select L-Series Tools/L-Series Service Tool 2.0 or DPG-2xxx digital governor.
• Optional communications harness to link your PC/laptop to the L-Series Controller, part number 8923-1061.
• Optional Universal PST kit with software and cable to link your PC/laptop to the DPG controller, part number 8447-1003. Note: The DPG controller includes an integral keypad for entering engine parameters. Kit offers the option of using a PC/laptop.