WM BMS250 advancing arm stopped working this morning.

[jimbarry]

Working great this morning, then it just stopped. Motor runs. Armature turns (manually).

Ideas?

video on youtube

[tawilson]

I had a roll pin work out of mine shortly after I got it. Stuck in a new one and hasn't happened again.

[jimbarry]

 

 

I think its the pin, part #49. I haven't dissasembled it yet to confirm, but that's what I am thinking.

[tawilson]

I bought the roll pin assortment from HF and it's still in it.  I did find the old one in one piece while putting the new one in. My theory on why it happened is the  blade clamp was too tight from the factory causing the pin to compress allowing it to work out. I let some pressure off it and it seems fine. I did have too make an adjustment on the throw after.