Detroit Diesel — Adjust Low-Speed Stop Screw
Adjustments · Governor low-speed stop screw
From a Detroit Diesel service manual — check it applies to your exact model before use.
Procedure
- Loosen the lock nut and back out the low-speed stop screw.
- Start engine and carefully reduce speed with the throttle until desired idle speed is established.
- Turn the low-speed stop screw down until engine speed just begins to increase.
- Tighten the lock nut to secure the stop screw in place.
Source: Detroit Diesel 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.