Generator Guide

What Type of Spark Plug for Predator 4000 Generator?

The type of spark plug you can use for the Predator 4000 generator is the NGK BPR6ES spark plug. It has the proper heat range and electrode gap specifications to ensure optimal performance and longevity. 

Having said that, let’s go deeper into why you should use high-quality spark plugs.

For instance, you want to change the spark plug on your predator 4000 generator, and unfortunately, all the ones you’ve tried aren’t giving you the results you want—they work sometimes and stop, or they’re just not the type you’re looking for.

As an engineer, technician, or generator owner, you must use the right type of plug for your Predator 4000 generators.

Hence, in this post, we discuss in detail what a spark plug is, the importance of spark plugs in generators, and the best type of spark plugs you can use for your Predator 4000 generator.

Table of Contents

What is Spark Plug?

The spark plug is the most important component of generators and all types of engines using gas or petroleum. Spark plugs are metal threaded shells that fit into the top cylinder head of an internal combustion engine.

It provides the electric spark that ignites fuel and air in internal combustion engines. This ignition process is necessary for the engine to start and run. 

Spark plugs are typically made of a ceramic insulator surrounded by a metal shell, with a center electrode protruding from the insulator. 

The tip of the center electrode is usually made of a precious metal such as platinum or iridium, which is resistant to wear and corrosion. 

Additionally, it comes in various sizes and heat ranges to accommodate different engine types and operating conditions. 

Why Is It Important to Change Your Spark Plug?

Understanding the importance of changing spark plugs can lead to better fuel efficiency and engine performance, saving you money in the long run. 

In addition, there are other things you need to know about, which include:

1. Replacing worn-out spark plugs can improve fuel economy by up to 30%.

Replacing old, dirty, fouled, or worn-out spark plugs with new ones improves fuel economy by 30%. 

This means that, if your generator consumes more fuel than it’s expected to, by changing the spark plug to a quality one, it will eventually reduce.

In addition, this is not only for generators but also for cars. The National Institute for Service Excellence also acknowledged that bad spark plugs can decrease the fuel economy of a car by up to 30% and also cost drivers up to about 94 cents per gallon at recent prices.

2. Worn-out spark plugs can lead to misfires, reduced power, and increased emissions.

Over time, spark plugs can wear out, become dirty, or become fouled with oil or carbon deposits. 

That can lead to misfires, reduced engine power, and increased emissions. If you notice your engine is running rough or your fuel economy has dropped, it may be time to replace your spark plugs.

3. Upgrading to high-performance spark plugs can improve engine performance and horsepower.

If you’re looking to boost your engine’s performance, upgrading to high-performance spark plugs can make a noticeable difference. 

You should always go for iridium spark plugs. Iridium spark plugs have proven to work effectively, but they are more costly than their counterparts. 

The spark plugs can improve the acceleration, fuel efficiency, and horsepower of generators compared to traditional copper or platinum spark plugs.

4. Properly maintained spark plugs can extend the life of your engine and save you money on repairs.

By keeping your spark plugs clean and replacing them when necessary, you can help extend the life of your engine and prevent more serious engine problems. 

This can save you money in the long run by reducing the need for expensive repairs or engine replacements.

What Type of Spark Plug for Predator 4000 Generator?

The type of spark plug we recommend you use for your Predator 4000 generators is the NGK BPR6ES. 

The spark plug can keep your generator working efficiently without issues, as it’s made of iridium. 

Iridium spark plugs are quality, long-lasting, and don’t wear out fast, unlike the others (copper spark plugs and platinum spark plugs).

However, the bad side is that their prices are higher than their counterparts, but the choice is yours to make. 


The type of spark plug you use for your Predator 4000 generator will determine how effectively it functions. 

Hence, with the spark plug I recommend you buy, there won’t be issues associated with spark plugs anymore with your generator.

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The views expressed in this blog are solely those of the author and do not necessarily reflect the opinions of the companies or products being reviewed. The information provided is based on personal experience and research and should be considered only as a starting point for further research.


By Abdulmajeed Abdulwasiu

Abdulmajeed Abdulwasiu is the founder of Generator Hacks, a writer, student, generator consultant and generator mechanic. He has 7 years of experience repairing generators, which he learned from his uncle, but naturally, he’s a writer. He loves reading, and writing and hence if he’s not repairing generators he’s writing.

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