If you hear strange sounds coming from your generator and you’re not sure where they’re coming from, it might be because the air filter assembly is damaged. If you discover this problem, it’s important to replace the air filter assembly right away. Ignoring it could lead to the air filter box breaking, allowing dirt to enter the carburetor through air intake. This can cause damage to the engine and the head valves.
But don’t worry, Generator Fixer is here to explain how to change generator air filter assembly including images and video. For all open-frame portable generators like Honda, Yamaha, Champion, and Generac, the process is the same. However, the process for changing some closed-frame inverters is slightly different.
What is an Air Filter Box?
A generator includes multiple technical components, each of which is key to its task. But some parts might seem less important than others. For example, people might not realize how important a generator battery is, but they might think things like engine oil or spark plugs aren’t as necessary.
But this is a big mistake. Without these parts, the generator wouldn’t work properly and might stop running altogether in just a few days. The same goes for the engine’s air filter assembly. This part is key for the generator air intake system. It holds the foam filter and is usually found between the air intake hose and the carburetor.
How to Change Generator Air Filter Assembly (6-Steps) Guide
Tools and Material (List)
Before starting any maintenance work on your generator, follow proper safety precautions. Include shutting down the generator, removing the spark plug wire boot, and allowing it to cool down before accessing the air filter assembly.
Step 1: Locate the Air Filter Assembly
Locate the air filter assembly on your open-frame portable generator. It is typically situated on the back, left-hand side of the generator, close to the recoil starter and carburetor.
Step 2: Remove the Cover and Filter
After finding the filter assembly, remove the cover. Depending on the model, you may need to remove screws, clips, latch holding, or knobs at the bottom of the filter cover to access the old air filter, then remove the foam air filter from the housing. Note that it may be oily.
Step 3: Remove the Metal Grate
Once you have access and remove the old filter, look at the metal grate held in place by two plastic pins. Pull it straight off the pins to remove it from the air filter housing.
Step 4: Detach Rubber Hoses
Take off the rubber tube on the back, left side of the air filter assembly. Use pliers to loosen the clamp holding it, then slide off the tube. Second, place another hose on top of the air filter assembly and simply remove it from the container. This time, the air filter assembly should now be loose.
Step 5: Removing Old or Broken Assembly
Finally, unscrew the three (3) nuts securing the air filter housing. First, use a 10 mm T-handle socket to unscrew the two front-side nuts, and then use a 10 mm ring spanner to unscrew the one nut located at the bottom back assembly.
Turn them anti-clockwise, which means to the left, to loosen them. Keep in mind where each nut was positioned, one in the middle, the second on the top left, and the third at the bottom back. After removing them, the box should come off easily.
Step 6: Installing New Air Filter Assembly
To install the new air filter assembly, begin by sliding it onto the generator. Next, reattach the three nuts that were previously removed, one in the middle of the air filter housing, the second on the top left-hand side, and the third at the bottom, backside of the housing. Make sure both nuts are full-tight but not overtight or loose.
After securing the nuts, plug both hoses back in. For the hose leading into the left-hand side of the air filter housing, use pliers to secure the clamp, while the hose on top can be reattached without any tools.
Once the hoses are connected, place the metal grate, ensuring it fits securely onto its threads, to prevent the foam filter from being sucked into the carburetor.
Finally, fit the foam filter back into the housing securely, and close up the casing with the filter assembly cover. If the air filter is old or dirty, you can clean it or replace it with a new one.
Video Guide
If you have any problems or difficulty with this replacement process at certain points, then you can watch this video.
Conclusion
Congratulations, You have replaced the air filter box or assembly on your generator, ensuring its successful operation over time.
I think you don’t need another guide or DIY professional help. However, if you face any issues while performing the process, please reach out Generator Fixer professional and send any queries.
