This demonstration guide answers one field question about a switch that shorts when the housing flexes. Measurements come before parts, and the notes are not a generic equipment FAQ.
Diagnose before replacing parts
Start with continuity while flexing the housing. That reading separates a switch that shorts when the housing flexes from adjacent faults that share the same complaint.
If the measurement is out of spec, treat the stop switch as the primary path. If it is in spec, do not replace the stop switch just to complete a parts list.
Repair the failed system
The usual correction is the stop switch, 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 switch that shorts when the housing flexes.
Stop before you make it worse
Do not taping the switch in the run position. That shortcut hides the original measurement and creates a second failure.
If the machine still fails after the stop switch is corrected, convert the visit to a broader diagnosis rather than stacking parts.
Written and published by Ridgeline Small Engine.