The impulse line is quite easy to replace. Get yourself a pair of hemostats,almost a must have these days for saw work, they are very thin and can make access into many cramped openings where ordinary needlenose pliers cannot get to. Fish the impulse line in through the airbox bulkhead where the carb nipple pushes into the hose/line, then attach it to the barb on the cylinder base, there is enough room to do this without dismantling the saw but I most often do take the saw down to clean out all the crud built up in under the crankcase and spline cavities.
