This demonstration guide answers one field question about a running test in a driveway with bystanders. Measurements come before parts, and the notes are not a generic equipment FAQ.
Diagnose before replacing parts
Start with exclusion zone before spark. That reading separates a running test in a driveway with bystanders from adjacent faults that share the same complaint.
If the measurement is out of spec, treat the bail and brake as the primary path. If it is in spec, do not replace the bail and brake just to complete a parts list.
Repair the failed system
The usual correction is the bail and brake, 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 running test in a driveway with bystanders.
Stop before you make it worse
Do not asking a child to hold the chute while you start a blower. That shortcut hides the original measurement and creates a second failure.
If the machine still fails after the bail and brake is corrected, convert the visit to a broader diagnosis rather than stacking parts.
Written and published by Ridgeline Small Engine.