Official Niagara generator parts

How to troubleshoot your Niagara generator when the engine won't start

When you can’t start your generator's engine, make sure the tank has fuel and that the fuel is fresh; stale fuel can become watery and won’t ignite well. Tune up the engine to give it the best chance of starting. Check the spark plug and replace it if it’s covered with oil or other deposits.

If your generator uses a battery, charge or replace the battery if it won’t power the starter to spin the engine. If you have to pull the starter rope to start the engine, replace the recoil starter if it doesn’t spin the engine when you pull the rope. Replace the starter rope if it’s broken.

Some generator engines have a low oil level switch that prevents the engine from starting and running if the engine's oil is low. Check engine oil level and add oil if needed.

Test the ignition system using a spark plug tester. Replace the safety switch or the ignition coil if the spark plug isn’t getting current through the ignition system.

Carburetor problems often prevent your generator's engine from starting. Replace or rebuild the carburetor if it’s clogged.

Check your owner's manual for additional troubleshooting tips to help you get the engine started.

Replacing the spark plug in your Niagara generator's engine

• When the engine is cool, disconnect the spark plug wire from the spark plug.
• Use a spark plug wrench to loosen and remove the spark plug.
• Use a spark plug gap tool to set the gap between the center electrode and the ground electrode. The gap specifications for your model are in the owners manual.
• Thread the spark plug into the engine. Then tighten the spark plug with a spark plug wrench. Reconnect the spark plug wire.