Originally Posted by matthurd
for me when i had a similar issue with my plug, i just took a pair of pliers, hand tightened the plug, then cranked it down with the pliers to tighten it all the way. worked for me.
If you relied on pliers you didn't get it tight enough. Pick up a spark plug socket from any tool supplier. You'll be glad you did. Most of the plugs that will work in the Chinese 2 stroke engines require a 5/8" socket. Probably less that $5.00 most places.
Pliers will not allow you to torque the plug correctly without rounding off the wrench flats provided on spark plugs or properly seat the plug against leakage.