General Motors — Installing the 225 Series electric actuator (electronic governor)
Installation · Electronic governor actuator
From a General Motors operator's manual covering: 4.3L 262 CID, 4.3L V6, GMG-643. Check it applies to your exact model before use.
Before you start
- The linkage should be adjusted so that the fuel control minimum fuel and maximum fuel stops are used rather than the internal actuator stops.
- Larger gauge wire necessary for cable lengths greater than 10 ft. (3 meters).
Procedure
- Drill the actuator mounting holes in a prefabricated mounting bracket.
- Affix the actuator bracket to the selected location on the engine.
- Attach the actuator securely to the mounting bracket.
- Adjust and secure the linkage rod and rod end bearings.
- Fabricate a cable harness to connect the speed control unit to the actuator.
- Push the actuator lever to the maximum full fuel position; on release the linkage should return smoothly to minimum fuel position.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Actuator capable of 25 degrees rotation
- Maximum misalignment of linkage rod ends 10 degrees
- Typical current 8 amps for 12 V systems and 4 amps for 24 V systems
- A 1.5 ohm 25 Watt resistor in series with pin A for 24 V operation
Source: General Motors operator's manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.