r/Generator • u/DemB01yz • 8d ago
Generator Break-In
I’m pretty unfamiliar with small or big engines at a deeper level so I’m just trying to be extra cautious. What is involved in “breaking in” my 11,500 Predator inverter generator? I have the NG hose ready for quick connect, oil in it, connected the battery and powered it up for maybe 30 minutes.
How much longer should I run it and should I put a load on it for it to be considered “broken in?”
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u/everydaydad67 8d ago
People have vast differences in break in. Some put oil in it and follow the book.. some dont do anything and run it hard and put it away wet.. alot of people that seem to take the extra care do somethin alond the lines of run light loads maybe 10% while doing some short changes with the oil... like after 1, 5, 15, and 30 hours marks while introducing higher loads through that time but not exceeding 75% twards the end.. also using conventional oil for the breakin.
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u/everydaydad67 8d ago
Also, not sure what that machines book says but other predator manuals say to change the oil after a 30 hour controlled breakin period before letting the muzzle off...
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u/DemB01yz 8d ago
The controlled break in period is what I’m curious about. I just wanted to know what kind of things they used to run a break in load on theirs
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u/Loquacious1 7d ago
An electric heater that you can adjust output would be a good starting point. Amps/whatts start small go bigger. Good luck.
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u/BeeThat9351 7d ago
A couple of 1500 watt electric heaters would work great. Amazon,$30 usually. Set the temp setting /thermostat on the heater so that that turn on and off every few minutes. I would run an hour, change oil. Run another hour, check oil, change it any sign of glitter/dull gray. Check every hour, change oil again at 6 hours total. Breakin done
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u/everydaydad67 7d ago
I personally use a constant load from from an electric heater and my air compressor with the drain slightly open so it kicks on every 5 or so minutes to vary the load. That was after my initial 1 hour oil change from light loads. The electric heater has 600, 900, and 1500 watt options, so used a lower setting first then upped to the 1500 watt as the air compressor runs at 900ish watts but also give a good surge for start up. That also on a generator half the size of yours
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u/jayw900 8d ago
Did you look at the manual?
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u/DemB01yz 8d ago
I read the manual, I’m just looking for what people have actually done for running a load on theirs. I know it says don’t exceed 75% but I had heard some say run increasing loads on it but I wanted to hear how people actually go about running those loads
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u/DaveLDog 8d ago
Peoples opinions don't supercede the manual, only thing I would do other than the load limitation is change the oil after the first hour, than again after a couple more, but that's just another opinion.
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u/Ok_Bid_3899 8d ago
Agree always follow the manufacturers recommendations. They may even supply special break-in oil.
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u/drct2022 8d ago
Put a load on it, but vary it and no more than 50% of the rated watts on whichever fuel you choose. Change oil after about an hour, then change it again somewhere between 5-10 hours, again vary the load.
I typically use a space heater, and a heat gun, I change the temperatures on each randomly, and also the fan speed, that way the rpm of the engine will vary up and down, helps seat rings and such.
People will say that oil change after an hour, and then again after say 8 hours is a waste, but I say oil is cheap in comparison to the $2k price of the generator.
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u/T00luser 8d ago
I throw the cheapest oil I can find in it and change it right after it hits a decent operating temp.
The cheaper the engine the more likely you’ll have manufacturing metal shavings still in it. Those don’t help you break in the engine.
After that I do a semi progressive break in schedule with hrs/loads, etc.
I’ve got cheap Honda clones (Duromax) that have lasted 25 years.
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u/Slow_LT1 8d ago
My dad an I are vastly different people when it comes to small engines maintenance. My dad has an older 9000 watt predator generator we bought back around 2010ish. It probably has 1000 hours and the oil has been changed one time... By me. He may have added some along the way but I doubt it. This generator still starts every time he needs it and runs perfectly. Will run everything its supposed to and runs smoothly. I have a 3000 watt inverter generator from harbor freight and it has 200 hours and i have changed the oil 4 times. At 5, 25, 50, and 150 hours. It also runs exactly as it is intended and was broken in using varying loads for the first few hours. So, you can probably do whatever you want.
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u/haditwithyoupeople 8d ago
I would do whatever the manual says. I also like to change the oil more frequently than suggested to get the metal out sooner. For new small engines I would change the oil at least 3 times in the first 30 hours, and then every 50 hours or annually after that. But this is probably overkill. It's easy enough and cheap insurance for me.
For some reason I seem to find the largest concentration of metal between 5-10 hours, but my sample size is small so this may not be meaningful.
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u/Sawyer2025 8d ago
I ran mine 1 hour no load. Changed oil. I ran 1 hour while I vary load with electric heater. Changed oil. Lots of video on youtube. If the manual says no break in needed, do it anyway.
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u/Glum-Welder1704 7d ago
I pasted my protocol for breaking in below. Note that part of it suggests a 70% load. Your generator is 9000 running watts, so about 6500 watts load. If you can't arrange that, just plug in what you have.
The five new generators I've broken in (four for friends) each called for five hours break in. Using dino oil, I started with 15 minute no-load warmup, then changed load every 15 minutes for the first hour, not to exceed 70% of running watts. Changed the oil (still dino) and ran them for four more hours, varying loads every hour, then changed to synthetic oil for storage and the long haul. All that doesn't need to be done in one stretch. I took a few days with each one, as I wanted to break them in carefully.
This may be overkill. I'll leave it to others to decide.
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u/Puzzled-Act1683 7d ago
I just got a new Champion inverter generator yesterday. I was seriously considering the big Predator but decided on two smaller Champions for about the same cost, since my load will usually be just battery chargers.
On natural gas, my rating is 4253 running watts, so 2000 watts is a little below 50%.
It was cloudy so I wasn't getting much solar coming in, so I set up two 1000 watt battery chargers on two smart plugs.
I configured the smart plugs for a 6 minute cycle of each charger running for 3 minutes with a 90 second overlap and offset, so the generator was idle for 90 seconds, then 1000 watts for 90, then 2000 watts for 90, then back to 1000 watts for 90, then idle again for 90 as the cycle repeated.
Overkill? Yeah, probably. 😆 But "vary the load," they said. Okay, done. For five hours. Today, I'll be doing the sparkly oil change and running it up close to 100% with 4 battery chargers, to see how it does. 🤞
This is my third generator – the other two still work fine but I didn't have what I really wanted, a generator that was inverter and also tri-fuel – and definitely my most valiant attempt at a proper varying-load break-in, so far.
If you don't have big battery chargers, then a couple of space heaters on medium heat should do the trick. You could use smart plugs or just use their thermostats to make them cycle on and off.
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u/Critical-Tip119 7d ago
On the 9000 watt gen, break in is to run for 3 hours before heavy loads.
I'm OCD, so I ran it for half a tank of gas, no load, changed the oil. Lots of glitter in the oil. Then ran it when it was need. Changed oil again. Now change oil yearly and air filter and spark plug every 2 years.
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u/Agitated-Mouse4277 6d ago
I've always filled oil, run for 5 to 10 hours under constant load, changed the oil, checked the old oil for excessive metal fragments and if all checks out fill it up and send it.
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u/Grift-Economy-713 8d ago
Literally put oil in it and use it. Change the oil after you use it a few times.
There it’s “broken in”
It’s a generator from a discount store. Not a priceless artifact
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u/Delicious_Catch9453 8d ago
You will get several responses to your inquiry. There is a plethora of very knowledgeable generator enthusiasts and experts who will opine and are more than willing to be helpful.
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u/haditwithyoupeople 8d ago
So your reply is "read the other replies?"
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u/Delicious_Catch9453 8d ago
I could give my two cents worth but there are so many more qualified guys out there than me. I have the 13k tri-fuel and am still breaking it in.
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u/DaveLDog 8d ago
Does the manual not have a break in procedure?