Could be. I bought it used so I have no idea what kind of maintenance the previous owner performed, but the guy I use now keeps it running well. Hopefully the new screws will work, with the copper or aluminium wire if necessary. Thanks again for the suggestions.
Had to do some digging, but it looks like it is a self-tapping screw. Ordered some replacements and will see how those do before trying the Loctite. Thanks for the suggestion.
I have an older model Murray riding lawnmower with a Briggs & Stratton engine. The motor mount bolts keep working themselves loose and falling out. I'm getting tired of replacing them. Last round only lasted for two mowings. Any recommendations for keeping them in?