hey guy's what is the thread size of a cm-6 spark plug ? i thought it was the same as a glo plug but i maybe wrong. that would be 1/4 32 thread. i don't own one so i was asked. thought i would check first. also is this the plug that the 15cc rcgf engine uses ? thanks a million.......RON

It is my understanding that the CM-6 spark plug uses a 10mm x 1mm pitch thread size.

i wasn't sure........thanks EARL.

Yep; 10mm x 1.0

AV8TOR

thanks again. i should have known a engine made in china would not have a 1/4 32 spark plug thread. it would have to be MM.there are some plugs that size though.......RON