Diagrams & manuals related videos. Save to my models. The repair clinic lawn mower troubleshooting guide is your fast track to mower repair diagnostics. Webhow to fix it yourself, fast! Regular lawn mower maintenance helps prevent problems, plus lengthens the life of your lawn equipment. But even with plenty of tlc, normal wear. Webjan 27, 2024 · there could be several reasons why your briggs and stratton lawn mower is not working, such as a dirty air filter, old or contaminated fuel, a clogged carburetor, a. Websmall engine won’t start or runs poorly. Determine why your small engine won't start by checking your oil level, fuel level, spark plug, carburetor, valve & compression levels and more. Follow along to troubleshoot and learn when it's best to service your engine.