General Motors — Velocity Governor Sensitivity Adjustment
Adjustments
From a General Motors operator's manual — check it applies to your exact model before use.
Before you start
- The sensitivity adjustment is factory set and sealed; only in rare instances should it be changed.
Procedure
- Remove the plug covering the sensitivity adjusting screw by carefully drilling a 1/8 diameter hole thru the center of the plug and prying the plug out.
- If engine is too sensitive, turn the SENSITIVITY SCREW 1/4 turn clockwise, and readjust the MAIN ADJUSTMENT to obtain the desired speed; end with a clockwise turn.
- If engine speed drops excessively when loaded, turn the SENSITIVITY SCREW 1/2 turn counter-clockwise, then 1/4 turn clockwise, and readjust the MAIN ADJUSTMENT.
- When adjustments are completed, seal the adjusting screws using HOOF SEAL KIT 200-940 or force SILICONE SEALER into the cavity around the screw.
Tools required
- 1/8 diameter drill Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
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.