I stored my lawn mower in my garage all winter and now it won't start. What's wrong?

This is a common problem often due to not winterizing the lawn mower prior to storage. The most common problem is old fuel which has become thick in the carburetor and clogged the fuel ports. Enter your lawn mower model for troubleshooting help. Prior to off-season storage, lawn mowers should be cleaned, and degreased, key parts should be replaced and fuel stabilizer should be added to fresh fuel to prevent clogging in the carburetor.