It doesn't harm the motor or its heat. In fact, it does not affect the performance of the machine. I use wood or plastic sealant most of the time, but I did have to work with silicone sealant a few times https://sealwithease.com/what-is-used-for-sealing-leaks-around-windows-and-doors/ and in the...
This problem was pretty close to me a few weeks ago. The exact same welder was literally pissing me off with its inefficiency. It was causing power surges in the garage, and it wasn't good until I decided to get some extra help.
I think that you will also find it helpful to know about the...