This demonstration guide answers one field question about fuel remaining in a hot combustion chamber. Measurements come before parts, and the notes are not a generic equipment FAQ.
Diagnose before replacing parts
Start with idle-mixture and kill-switch continuity. That reading separates fuel remaining in a hot combustion chamber from adjacent faults that share the same complaint.
If the measurement is out of spec, treat the kill-switch lead and idle jet as the primary path. If it is in spec, do not replace the kill-switch lead and idle jet just to complete a parts list.
Repair the failed system
The usual correction is the kill-switch lead and idle jet, installed to the documented spec for this complaint.
A demonstration shop records the finding so the next technician is not repeating a guess about fuel remaining in a hot combustion chamber.
Stop before you make it worse
Do not revving the engine before shutdown to "clear" it. That shortcut hides the original measurement and creates a second failure.
If the machine still fails after the kill-switch lead and idle jet is corrected, convert the visit to a broader diagnosis rather than stacking parts.
Written and published by Ridgeline Small Engine.