Spark plug change in your open-frame generator is a straightforward and important maintenance task to ensure your generator starts smoothly and efficiently.
A properly maintained spark plug is key to the ignition process in your generator’s engine. A worn-out or dirty spark plug can seriously affect your generator performance, leading to misfires and, a hard start.
But don’t worry, Generator Fixer is here to guide you through a 7-step process on how to change, clean an old plug, or adjust the gap. We also provide images and video guides for specific models and brands to help you maintain your generator’s reliability and performance
When to Change a Spark Plug?
It’s generally recommended to change the spark plug in a generator after every 100 to 150 hours of use or at least once a year, whichever comes first. But it’s my recommendation as a GenFixer that 200 to 300 hours of use are normal, otherwise, if there are no symptoms of a faulty plug,
However, if you notice any signs of wear if your generator is not running smoothly, or if it drinks more fuel, it’s a good idea to check and possibly replace the spark plug sooner.
It’s also smart to check the spark plug now and then for any signs it’s worn out, like if the part that sparks is dirty or broken. If you see that, put in a new one.
What Does Spark Plug Do?
A generator spark plug plays a crucial role in the ignition process of the engine. When the generator is started, the spark plug generates a spark that ignites the air-fuel mixture within the engine’s combustion chamber.
This spark is what starts the engine running, making the generator produce power. The spark plug is what gets the engine going smoothly. If the spark plug doesn’t work well, the engine might not start or run properly.
The engine may struggle to start or run inefficiently, leading to reduced performance. That’s why it’s important to keep an eye on it and replace it when needed.
How To Change Generator Spark Plug in 7-Steps
It’s important to follow these instructions carefully and refer to your generator owner’s manual for specific details, as procedures may vary by make and model. But i will provide different models videos guide.
Tools and Materials
Before you start any maintenance tasks on your generator, make sure to follow the correct safety measures. This includes turning off the generator, taking off any power connections, and letting it cool down before you access the spark plug.
Step 1: Locket the Spark Plug
Some people ask where the spark plug is located. The spark plug is a small but vital part of your generator’s engine. It’s typically located open-frame on the cylinder head of the engine block, and it is commonly hidden below a removable casing and protected by a spark plug boot.
Sometimes, the spark plug might be in a hard-to-reach spot. You might need to take off other parts or take apart the engine to get to it. But in newer inverter generators, it’s behind a side plate.
If you are having trouble finding your spark plug location, check out the user manual. It might reveal where it might be hidden and how to gain maximum access to it. Moreover, some brands and stronger models may come with multiple spark plugs.
Step 2: Disconnect Spark Plug Boot
Now you have found where your old spark plug is located then disconnect the spark plug boot/cap from the spark plug itself. To do this, grip the spark plug boot (the thick part of the wire) and pull it straight off the spark plug. Avoid pulling on the wire itself to prevent damage.
Step 3: Remove Old Spark Plug
After removing the spark plug boot or cap from the plug, use a spark plug socket wrench with the correct size 3/8 (14 mm) or 5/8 (16 mm) to begin loosening the old spark plug by turning it counterclockwise.
If your generator spark plug is located deep within the engine, you might need a socket wrench extension to access it effectively. Continue turning until the spark plug can be removed by hand.
Step 4: Inspect Old Spark Plug
Now this moment to closely check the old spark plug. Clean the aging plug and its housing around it, and confirm the removal of any black residue and debris from the plug. After the job is done utilize WD40 and a clean brush.
How to Check the Condition of Your Old Spark Plug?
Connect the plug boot to the old plug and hold it close to the crankcase; don’t screw it in a hole. Note that you are holding the plug boot/cap in your hand, not a plug.
Moreover, if no sparks are seen, there may be an issue with the ignition coil. It’s time to check and change the ignition coil, otherwise, continue the next step.
Step 5: Gap Adjustment New Spark Plug
The plug gap is important to Check your generator owner’s manual or the manufacturer’s specifications for the recommended spark plug gap size.
This gap is the distance between the center electrode and the ground electrode and is key for proper ignition.
If you are still unsure whether you have the correct gap, use a spark plug gapping tool to adjust the gap on the new spark plug to the required size if necessary.
Step 6: Install the New Spark Plug
After adjust the plug gap, then thread the new spark plug into the spark plug hole by hand. Start by turning it clockwise to ensure it goes in smoothly. Do not cross-thread it; it should thread easily.
Once it’s threaded in by hand, use your socket wrench or spark plug socket and ratchet to tighten it snugly. Usually, a quarter-turn to an eighth to six turns after it touches the cylinder head is sufficient. Be cautious not to overtighten, as this can damage the spark plug or cylinder head.
Step 7: Reattach the Spark Plug Boot
With the new spark plug securely in place, it’s time to reconnect the generator spark plug boot. Push the plug cap rubber boot of the wire firmly onto the spark plug until you feel or hear it “click” into the right position.
Verify that it is securely attached to the spark plug to prevent any electrical arcing or disconnection during engine operation.
Make sure all connections are safe by taking a moment. Check to make sure there are no loose wires or components near the spark plug area.
Video Guide
This is important to verify Since we are aware that every generator brand and model is different, it’s challenging to give you a single, detailed guideline.
For this purpose, we are providing you with an entire section of video instructions on how to change spark plugs in generators of multiple brands and types.
| Brand | Models |
|---|---|
| Champion | 3100 Watt, 3500 Watt, 2000 Watt |
| Honda | EU7000is, EU2000i, EB6500x |
| Generac | IX2000, 44563, 6500, GP5500 |
| Cat | INV2000, RP1200E |
| Ryobi | RYI2200 |
| Westinghouse | 7000 Watt |
| Predator | 3500 Watt |
| Firman | W3650IR |
| Briggs and Stratton | 8000 Watt |
If your specific brand or model is not listed on the list, please contact us and mention your particular brand and model. We will try to mention your desired video for your brand in this article as soon as possible.
Conclusion
Luckily, we covered every step of the replacement process for a traditional generator spark plug. When these steps are carefully taken, the highest performance and dependability are guaranteed. Both the longevity of your generator and its use in emergencies and other scenarios are extended.
Please maintain a detailed record of all maintenance procedures, like filter cleaning and oil changes.
FAQs
What happens if the spark plug gap is too big?
If the spark plug gap is too small, the spark will be weak, and the engine can’t burn the fuel properly, like trying to light a tiny fire that doesn’t catch. But if the gap is too big, the spark might not happen at all, making the engine stutter or stop, especially when going fast. It’s like trying to jump a big puddle but not making it all the way across!
How do I know if my generator needs a new spark plug?
Common signs that your generator spark plug may need a replacement include difficulty starting, misfires or increased fuel consumption, and a visible build-up of carbon.
How much gap for spark plugs?
The gap, or space, between parts of the spark plug is really important because it controls how strong the spark is. This spark helps the engine burn fuel properly. The owner’s manual tell you the right size for this gap, which is usually between 0.028 and 0.060 inches. If you’re not sure how to set this gap or use a spark plug that’s already set, it’s a good idea to ask a professional for help.
