A generator owner discovered an unexpected problem during an annual test: The engine started without trouble, but the on/off switch wouldn't shut it down.
Here's what to know
The owner shared the experience in a Reddit post, explaining that their 6.5-kilowatt, dual-fuel generator spends most of the year stored in a garage.
The test included a light electrical load on the 120/240-volt unit. The owner had connected a propane supply and started the engine.
"It wouldn't shut off," the original poster wrote.
More background
The faulty switch was particularly concerning because the OP planned to use gasoline if propane wasn't available.
"That's cool if I only run propane, but gasoline is plan B and I wanna make sure I can turn it off without yanking a spark plug," they explained in a reply.
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Whether the failure extended to the low-oil shutdown was another worry for the owner.
"Good thought about the low oil cutoff — usually it and the power switch share a common ground," one commenter noted. "If the connection to ground is lost, neither one will be capable of killing the spark."
What can be done?
The OP planned to inspect the ground connection and check for corrosion, particularly where it connects to the engine block. Another commenter suggested the switch itself could be faulty.
Closing the propane supply, rather than using the switch, was the shutdown method specified in one commenter's manual. That commenter owned a Champion 5500/4000 dual-fuel generator, so the guidance was not necessarily applicable to the poster's model.
One commenter recommended an annual run of at least an hour under heavy load, while others preferred testing every few months.
"I check & run mine every 3 to 4 months just to be on safe side," they wrote. "Only propane though so never a carb issue."
Where can I learn more?
A routine test brought this owner's shutdown problem to light, and other generator owners have dealt with fuel-system repairs, outage surprises, and unexplained stalling.
• A generator owner saw 235-245V voltage swings as a technician pushed repairs before warranty expiration.
• A dual-fuel generator handled propane duty, then a carburetor replacement fixed gasoline operation.
• A generator owner's first outage exposed gaps in lighting, CO alarms, and Wi-Fi despite years of practice.
• A generator died after 20 minutes, prompting Reddit users to suspect a carburetor issue.
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