Cutter Blade Nyloncutting headBlades (nylon cutting heads) other thanspecified ones............................................................Replace by specifiedonesWorn cutter blade......................................................Set bladeDamaged cutter blade(nylon cutting head)(breakage, chipping)..................................................ReplaceWorn or loose washer................................................ReplaceSwing of cutter shaft..................................................ReplaceCutter blade (nylon cutting head) not mountedsecurely.....................................................................CorrectWorn inner shaft or bearing, shift of bearing..............Replace Curved innerShaft.....................................................Adjust (Replace if curve is excessive)ExcessivehandlevibrationPowertransmissionMisalignment of clutch drum......................................Adjust (ifmisalignment is tooexcessive, replace)Excessive wear of clutch shoes................................ReplaceWear of retainer mounting parts............................... ReplaceExcessive clearance between pipe case and pipeCase holder............................................................... ReplaceHandleholderEngineIrregular handle mounting..........................................Adjust, retightenIncorrect handle position (handle balance) ...............Adjust DefectiveAntivibration Rubber .................................. ReplaceLoose parts.................................................................Adjust, retighten(Stand, fuel tank, muffler, carburetor, covers, etc,)Irregular combustion (rich mixture)............................Overhaul, cleanWear, damage of parts ............................................ Replace(Bearing, shaft, piston, magneto, etc.)