A small problem concerning backplate help needed.
I have an os46 fx engine. There are a total of 4 screws to connect the back plate to the engine body. Problem is that One screw does not tighten because the threadness on the hole(the one in engine body) is gone. I know I can buy spare screws and back plate but problem is in engine body. Is it ok to run the engine with only 3 screws on? if not anyway I can fix it?