440 Trailfire

[farmerson]

I think that the stuff on the plug was just carbon. i put different plugs in it last night then ran it around the field ran great for about 20 mins then started pulling down and then eventually lost most of its power and then when idling finally died like the spark gets weak when it gets hot. but then i tried to restart it and all it did was crank and wouldnt fire, so i let it sit pulled the plugs this morning and they were both good and clean no more crap on either plug and i shined a light at the pistons and they both looked good. i know its getting plenty of gas because the plugs were wet from where i tried it this morning. i even gave it a shot of ether and it still wouldnt fire, and this is when its cold it normally fires right off with choke and a little throttle. so iv got it down to i think something is getting hot when its ran more then 20 mins and shutting spark off to it. iv got another trailfire 440 that i can take parts off of. and a cyclone 440 that i can take some parts off of too.