So your new portable generator has just been delivered. Yay! But before you start planning your next camping or caravanning trip and backyard barbecue, you need to know the basics of how to break in a generator to ensure you start without any operational issues.
Yep - you read that right. In fact, the first few hours of using your portable generator will greatly impact its lifespan and performance. Generators can be expensive, so you want to ensure you do this correctly to avoid damaging your brand-new unit.
So, what do we mean by "breaking in my portable generator"? Is it the same as the first time you use it? Absolutely not. Think of it as a warm-up before actually putting the generator to work. Breaking in a generator means letting it run a cycle for a certain amount of time and changing the oil after every cycle.
This allows the oil to run through all the moving parts in the engine, clean it, and get it ready for future use. Also, prepping your generator is important because when engines are new and have never been used, there is a good chance that tiny pieces of metal will break off. This can cause significant damage to your engine over time and shorten the overall service life of your unit.
Which brings us to the next question: How do I break in a generator properly?
No worries; we'll take you through it step-by-step and equip you with a comprehensive explanation of each procedure. Read on and be extra prepared when you finally buy that generator!

How Do I Use a Generator for the First Time?
When you're using a generator for camping or as a backup power source for the first time, it’s important to follow proper setup steps to ensure both safety and optimal performance. Here's a simple guide for setting up, fueling, and running a small portable generator for the first time:
Choose a Safe Location
Always place your generator on firm, level ground outdoors. Make sure it’s at least 3 feet away from any building or structure. Keep the exhaust clear to avoid any carbon monoxide buildup.
Fuel and Oil Setup
Add the recommended fuel and oil as described in the operator’s manual. Ensure you're using the right type to avoid engine damage. Don’t forget to check for fuel leaks.
Start the Generator
After fueling, start the generator. On the first attempt, it might take a few pulls. Be patient—it’s normal.
Load It Up
For safe generator setup for home and outdoor use, make sure not to exceed 75% of the generator's rated load during its first few uses. This helps ensure the unit doesn't work harder than necessary.
Run the Generator
Allow the generator to run for at least 30-60 minutes on its first use to allow the oil to circulate properly.
How Do I Break In My Portable Generator Properly?
The initial process of a generator break-in usually takes around 25 hours. Still, it is fairly easy, especially for those who have done it. If you're a first-timer and don't have much experience handling a camping generator, here are the most important steps to properly break in your spanking-new outdoor gear.
Step 1: Read the Operator’s Manual
You might think that little piece of paper can be skipped, but it's actually filled with helpful information on the steps you will need, including additional instructions on changing the oil, usage, and more.
Step 2: Shop For Supplies To Lubricate Your Generator
Buy fuel, oil, and a funnel. Choose which oil and fuel the manufacturer recommends and use the funnel for mess-free pouring (do not use the same funnel for both the fuel and oil to avoid contamination.)
Step 3: Add Oil And Fuel To the Reservoirs
Fill the reservoir to the recommended level and avoid overfilling. Wait for the oil to flow in every intended area, then top off as needed. After this, fill the fuel tank using a clean, authorised fuel can. For Gentrax portable generators for camping, we recommend using either 9IRON or regular unleaded fuel, whichever is more accessible to you.
Step 4: Start the Generator
Start up your petrol generator after the fuel has been added. Remember, it is normal if the generator does not start up right away after the first or second pull. Just keep trying until the engine starts.
Step 5: Run the Generator
Refer to the manufacturer's guidelines for the minimum time your generator should run initially. If there's no recommendation, run it for a full hour. Keep in mind: You can connect a load to your unit during the generator break-in period as long as it does not exceed 75% of the generator's capacity.
Step 6: Second Start (Optional)
Allowing your engine to run for a second time will ensure that all remaining metal bits collect in the oil. After this, drain the oil and refill the engine before running it for the first time on your next adventure.
Why Break In a Small Portable Generator?
Properly breaking in your generator not only enhances performance but also extends its lifespan. The process helps to gradually familiarise the engine with its operating conditions and reduces wear over time.
Engines, particularly new ones, have microscopic metal parts that can shed during the initial running period. A break-in period ensures these particles are flushed out of the system, preventing them from damaging sensitive components. Following the break-in procedure also ensures your engine’s oil is circulating properly, allowing the moving parts to function at their best.
If you're in the market for the best small portable generators for beginners, opting for a well-maintained and properly broken-in generator will provide you with a smoother, more reliable experience. Pro tip: You’ll never go wrong with inverter generators from Gentrax!
Generator Maintenance Intervals
So your generator has warmed up and is ready for use? Great, now it's time to learn what you need to check daily, monthly, or yearly. Yes, it doesn't stop with the break-in process alone. These constant checks will ensure your generator stays in optimal condition for reliable performance with every use.
Pre-operational Daily Checks
- Check your engine oil level.
- Check choke operation.
- Check the fuel hose for cracks or damage. Replace if necessary.
- Check for leakage. Retighten or replace the gasket if necessary.
- Check the muffler screen. Clean or replace if necessary.
- Check your starting system.
- Check if the pilot light comes on.
Initial 1 Month or 20 Hours
- Replace your engine oil.
Every 3 Months or 50 Hours
- Check the spark plug condition. Adjust in case of gaps and clean. Replace if necessary.
- Clean or replace your air filter.
Every 6 Months or 100 Hours
- Replace your engine oil.
- Clean the oil filter.
- Clean the fuel cock filter.
- Check all fittings and fasteners.
Every 12 Months or 300 Hours
- Check and adjust your valve clearance when the engine is cold.
- Check your exhaust system and see if some parts need replacement.
- Check for damages within your cooling system.
- Check and adjust engine idle speed.
- Check the breather hose for cracks or damage. Replace if necessary.
A Few More Things To Remember
We’re almost done. Here are a few more reminders to keep your generator in excellent condition.
- Do not exceed 75% of the generator’s rated capacity during the break-in period.
- Place the generator on firm-level ground away from buildings or other structures and ensure the exhaust is not obstructed.
- Never operate the generator in wet(rain) or snow conditions.
- Make it a habit to clean the exterior of your generator and apply a rust inhibitor.
- When not in use, cover the generator and store it in a dry, well-ventilated area.
And that is it. Pat yourself on the back. Your generator break-in is a success! Now, you can start planning for that weekend campout or road trip!
Frequently Asked Questions
Why is breaking in a generator necessary?
Breaking in your generator ensures that oil circulates properly through the engine, removes tiny metal particles that may shed during initial use, and extends the lifespan of the unit. Skipping this step can lead to premature wear and reduced efficiency.
How long does it take to break in a portable generator?
The break-in process typically takes about 25 hours. This includes running the generator in cycles, allowing oil circulation, and performing at least one oil change before regular use.
Can I use my generator at full capacity during the break-in period?
No, it's recommended to keep the load below 75% of the generator’s rated capacity during the break-in period. This helps prevent excessive strain on the engine while it’s adjusting to operation.
When should I change the oil during the break-in process?
You should change the oil once after completing the break-in cycle to remove any metal particles that may have accumulated from the new engine components. This typically happens after running the generator for the first time, allowing it to rest, and then running it a second time. Once the second run is complete, drain the old oil and refill it before using the generator regularly.
What type of fuel and oil should I use?
Always refer to the manufacturer's manual for the recommended fuel and oil type. Using the correct oil grade and unleaded fuel (or propane for dual-fuel models) ensures smooth operation and prevents engine damage.
Is breaking in required for all portable generators?