ok guys--no fire. was changing 2 bad gp prior to winter---and the bad ones were beru--now--i burn wvo--2/3--1/3 dsl. soooo. was running this all summer--and no--i didnt let it idle. soooo, when i went to remove the RIGHT rear gp--------the nicest one!! the outer shell--twisted right off the center electrode!!!!!!! i/e--the piece with the threads--backed right out of the block, and left in the center piece---#$#^$&%*^(() grrrrrrrrrr. it was coming out a "bit" stiff--but i thought id be ok--uh huh!! NOT!! so, i grabbed my can of Kroil--poured in into the hole--and left set--yup--for 2 weeks!!! cause the option of pulling the head--WASNT!!!!!! so today--started snowing!! and couldnt get it in the shop--as i had somethign else in there--30 deg out!!!! BRRRRRRRRRRRRRR. theres about a 3/4 inch area--that is tight around the gp, if you pull one--youll see it. so, i took a short bolt,and started to hit the bolt,against the gp,down into the comb chamber, i went appro 1/2 in, and it was going down!!! yaaaaaaaa. i then took the small needdle nose vg-and started to twist it--it started to move--by feel, so i i kept going, and started to twist up a bit--after about i minute of steady work--out it came!!!!!!!!!!!!!!! course--i didnt feel my fingers much anymore---but its back together--starts much better also!!! and i pulled allllllllllll the gps, and coated them completely, all the way down--with antisieze,,should solve THAT problem--apparently--a bit of wvo got up around that gp--and stuck that dog--