Yeah. same here with my volcano. Like when u pull the pull start it feels a little softer to the pull?It could be something wrong with your pullstart mechanism. It could be your OWB might be a little oily or gunk in it? Or your glow plug is not inserted correctly and you crossed threaded it thus messing up the entire egine(doubt it). But if your going to get a new glow plug go with the os a3 if you have a .18 egine. Also EHOOF I did tightend the cooling head and it still leaks. Under the cooling head is there suppose to be a gasket?