Originally Posted by Creative Engineering
The photo below shows a crankshaft with the weights removed. The bolt hole pattern for mounting these weights are 120 degrees apart. The cut-outs for balancing should, of course, be postioned at the rod big-end. One of the weights on this crank had been fastened, "clocked", 120 degrees out. I'm certain that this is why some engines vibrate so much more than others.
So to fix it you just moved it back 120 degrees? That particular crank still in use or is it sitting with parts? And how hard or easy was it to dissasemble the engine that far?
I'm truly appreciating your work.