Northern Lights M673 / NL673 — Retrofit Procedure

Repair & overhaul · Voltage regulator (DS-71-2 to DST-61)

For the Northern Lights M673 / NL673, from the Northern Lights service manual.

Applies to: Northern Lights M673, Northern Lights NL673

Procedure

1. Disconnect AVR connector and yellow and brown leads from the small terminal block.
2. Remove four screws that mount the old regulator and remove the regulator.
3. Install the adaptor mounting plate in the junction box with the 4 short screws and lock washers.
4. Install the DST-61 regulator with the 4 long screws and lock washers.
5. Cut the number 4 conductor from the generator and crimp on the two lugs. Tug test the crimps.
6. Assemble the fuse into the fuse holder and connect the two new crimp lugs to the fuse holder terminals. Secure with tie wraps.
7. Reconnect AVR connector and yellow and brown leads to the small terminal block.

Full service-parts list: Northern Lights M673 →, Northern Lights NL673 →

Source: Northern Lights service 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.

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