Can a lawn mower misfire?

Question

Briggs&stratton quantum engine can it misfire if has old spark plug or if the timing is off?

Answer 1

Yes, any combustion engine can misfire. Check your plug condition and gap. If okay check to see that your spark plug wire is firmly attached to the top of the plug and not bouncing around. Not sure if this is a multiple cyclinder engine or not but be sure to do the same for all of the remaining cylinders. You can pinpoint a dead cylinder by pulling a plug wire off at a time and seeing if the idle quality changes. However, remove wire while engine is off and then start so that you dont get shocked!