Hi, just a quickie, Hows everyones hunting idle?? Mines like a rolling throb! for a few seconds it ticks over fine then drops to a throbbing hunt for a few seconds and so on, as if pressure builds up and also it puffs strong fumes while hunting!! also them damn bubbles in fuel line when i give it a boot ,are baffling me as iv changed and checked everything and all is airtight!!!.. is there any sort of manual for this model or arnt they worth printing as they carnt be fixed?