guide · Generators
Generator Won’t Start? What to Check Before You Assume It’s Broken
Most no-start generator problems are simple checks first. Start there before assuming the generator needs a major repair.
Check fuel first
Make sure there is fuel in the tank and that it is the fuel the generator is meant to use. Old or contaminated fuel is a common reason an engine that ran last season will not cooperate now.
Work through the basic controls
Check the fuel shutoff, engine switch, and choke position using the model’s current manual. These are simple items, but they are easy to miss after a generator has been stored.
Check oil and basic maintenance items
Many generators have low-oil protection. Check the oil level as directed by the manual. Then inspect the spark plug and air filter if the basic controls and fuel are in order.
When the fuel system needs attention
If fuel has sat for a long time, carburetor or fuel-system trouble becomes more likely. This is where I would stop guessing. Use a qualified repair shop if you are not comfortable following the manufacturer service procedure.
Keep the safety line clear
Never run a generator indoors, in a garage, or near doors and windows. Do not backfeed power into a home. Use an approved transfer setup installed or reviewed by a qualified electrician.