did you check the blade plate ? if its one of the 4 blade later types , check around the bolt washer for cracks on plate , remove it and take a GOOOOOOD LOOK , any evidence whatsoever replace it , the are prone to pulling out the centre . good you said it vibrates as that is the 1st sign . hard to see but sure it will be cracked , those ones shoot out like one of them ninja thingys and kill stuff . if you have a 2 blade bar with oval slots n centre bolt ? test it n see if it fixes the problem .................. HARD to see sometimes BUT............................
dont sell to bikies
