Installation Adjust High Idle RPM (Mode No. 72103) 1. Loosen the lock nut (Fig. 1). 2. Apply several drops of thread adhesive to screw between lock nut and control plate (Fig. 1). 3. Start engine: refer to tractor Operator’s Manual, and move throttle to fast position. Using an accurate tachometer, adjust engine high idle to 2800 RPM. 4. Tighten lock nut and check engine high idle RPM setting (Fig. 1). 5. Apply several additional drops of thread adhesive to screw threads above lock nut (Fig. 1). Figure 2 1.