sprocket

Hi Y'All, Today I was cleaning my Stihl MS261, after using it for several hours a few days ago, when I found the sprocket on the 20 inch bar was "frozen". I could not turn it. Never have seen that before in many years and different saws????? I finally worked it loose and back to...

my McKee econoplow snow blower needs some love. the chain tensioning is done via a flat belt pully and a bolt in a slot for adjustment, very simple and very worn out. should I find another flat belt pulley or replace with an idler sprocket? any advantage or disadvantage to either one? its a...