A generator that refuses to start can turn a stressful outage into a much bigger — and more expensive — headache. But when one Predator inverter owner went looking for an electrical issue, fellow Redditors suggested the fix could be much simpler.
Here's what to know
In a post on r/Generator on Reddit, the original poster wrote that they have a "3-4 yr old Predator Inverter 4550 that is absolutely driving me nuts trying to figure out why it is so tough to start."
As the accompanying video footage showed, the machine does start eventually, but as the original poster noted, it "seems to start the best after letting it rest for 15 min after 10-15 pulls."
(Click here to watch the embedded video if it doesn't appear.)
"It will also sputter quite a few times but just won't take off," they explained further. "Turning off choke just kills it. Then, all of a sudden, I pull the cord and it fired right up."
By the time they sought help, the owner had already gathered a compression reading of 75 psi after six pulls, checked valve lash and the starter switch, bypassed the carbon monoxide sensor, replaced the spark plug and ignition coil, drained the gas tank, and cleaned the carburetor three different times.
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Despite all of that effort, the discussion kept returning to the same possible source of the trouble: the carburetor.
One commenter suggested, "Carbs are cheap. Replace it. Sometimes they look super simple, but something in some passage corroded and they can't get the mixture right anymore or something like that. Again, carbs are cheap."
"From what I've seen on James Condon's channel, it could be a tiny bit of gunk in the main jet, which he gets out with a tiny drill set," another person said.
Others mentioned additional possibilities, including an air leak, an off-spec coil gap, or valve-timing issues.
More background
Portable generators are often most critical when people are already dealing with difficult conditions.
The owner said the same starting problem showed up during "an eight day power outage after a nasty storm came through my area," and that experience made them reluctant to turn the machine off once it was running.
A new carburetor or a properly cleaned jet could get a generator starting reliably again and help avoid unnecessary service appointments or the need to replace the unit entirely.
Reliable starts can also reduce wasted fuel from repeated pull attempts and extended choke use.
Commenters noted that a carburetor can still cause mixture problems even when it appears clean. The owner said they had removed all parts and could "see clearly through all jets," but others pointed out that internal passages may still be restricted enough to affect performance.
A machine that eventually starts is not the same as one you can trust when the power goes out.
What can be done?
Commenters said the basics should be ruled out first, including fresh fuel, spark, secure coil connections, proper coil gap, air filter condition, and any leaks on the carburetor side.
If those boxes are checked, the next budget-friendly move may be to replace the carburetor rather than repeatedly cleaning the old one. Swapping it out could be a relatively small gamble compared with paying for a full diagnosis or buying a replacement generator.
Fuel type may also be worth testing. One commenter suggested trying ethanol-free gas if it is available, while another recommended using canned fuel for troubleshooting. While that costs more per gallon, it can help determine whether fuel quality is contributing to the problem before making a larger purchase.
Several commenters said that if carb spray does not make starting any easier, it may be time to look deeper into mechanical causes such as valve timing, pushrods, valve movement, or the compression release.
Where can I learn more?
That kind of trial-and-error troubleshooting comes up all the time with home equipment. Even a small problem can waste energy, create safety headaches, or leave people scrambling when they need something to work.
• A homeowner found that cleaning a hot water heater helped restore efficiency and cut wasted energy.
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• A Florida resident who bought a used Firman generator for $200 thought it was a bargain after getting it running, but the unit later showed signs of overheating near the battery.
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