The No. 1 cause of clogged fuel injectors and carburetors is stale fuel. Today's alcohol-rich fuels wreak havoc when left to sit. If you're not going to use your rig for 30 days or more, treat the fuel with conditioner. Forget and you risk fuel lines deteriorating from the inside out, depositing goo inside your carburetors or fuel injectors. Small deposits of fuel left inside injectors or carburetor float bowls and jets can gel and solidify, making for a lengthy cleanup job come spring. Add stabilizer, such as Bell Performance, Star brite Star-Tron, Sta-Bil, or Techron Protection Plus, per the amount on the label on your last voyage of the season, and run your engine long enough — at least 15 minutes — to get the doctored fuel through the entire fuel system.