This demonstration guide answers one field question about a setting that exceeds the pump’s documented psi. Measurements come before parts, and the notes are not a generic equipment FAQ.
Diagnose before replacing parts
Start with gauge pressure at the pump. That reading separates a setting that exceeds the pump’s documented psi from adjacent faults that share the same complaint.
If the measurement is out of spec, treat the unloader spring as the primary path. If it is in spec, do not replace the unloader spring just to complete a parts list.
Repair the failed system
The usual correction is the unloader spring, installed to the documented spec for this complaint.
A demonstration shop records the finding so the next technician is not repeating a guess about a setting that exceeds the pump’s documented psi.
Stop before you make it worse
Do not chasing a higher number because the wand "feels soft". That shortcut hides the original measurement and creates a second failure.
If the machine still fails after the unloader spring is corrected, convert the visit to a broader diagnosis rather than stacking parts.
Written and published by Ridgeline Small Engine.