Hey guys i have this Jiffy Legend Lightning Xt auger i cant seem to get it to run at all,it worked last time i was out. I tried new plug, i have spark, compression was 90 . It seems to be blowin back through carb cause the aitf ilter is soaked in gas/oil. If i need to can you buy motor parts like pistons and cylinders or do you get whole powerhead... thxs