F6TC spark plug to NGK: The F6TC spark plug can be replaced with the NGK BPR6ES as a direct equivalent, offering similar specifications for small engines. Both spark plugs have the same thread size, reach, and heat range, making the NGK BPR6ES a reliable and durable option for optimal engine performance.
When it comes to maintenance of small engine vehicles like lawn mowers, go karts, motorcycles and generators, having the necessary parts like spark plugs are crucial, for which the rugged F6TC is recognized to primary small engine applications for its durability and reliability. However, quite some users would rather substitute their F6TC spark plugs for its NGK counterparts.
This guide will help the users understand the reasons of switching to NGK spark plugs and the reasons that F6TC plugs and NGK counterparts are interchangeable. It will also offer some basic installation and maintenance tips along with their proper use as engine plug replacement.

Contents
What is the F6TC Spark Plug?
This guide will now focus on the replacement the guide will focus on the replacement and the reasons for why the F6TC spark plug is so much in demand. The F6TC spark plug is made by Torch and is compatible with a large number of small engine devices.
F6TC Spark Plug Specifications
Here are the main specifications for the F6TC spark plug:
- Thread Size: 14mm
- Thread Reach: 19mm
- Hex Size: 21mm
- Heat Range: 6 (on a scale from 1 to 12, with 6 being mid-range)
- Seat Type: Flat
- Electrode Type: Standard
For all of those who are wondering, a lawn mower, garden tool, go kart and even a small motorbike is powered using a small engine. Thus the spark plug being discussed above is widely used in those types of small motor vehicles.
Reliability ignition systems and combustion performance are both patented functionalities. These functionalities are especially useful when starting and running an engines at throttle as well as in situations where combustion fuel is provided and fuel proportioning is required.
Why Would You Need to Replace the F6TC Spark Plug
The same applies to the F6TC and each spark plug: it too has a set lifetime. In the engine it is subject to wear from carbon or corrosion build-up as well as general wear and tear. Defending the engines maximum potential means replacing the spark plug has to be done. Reasons for replacing the F6TC spark plug are summarized below:
- A drop in engine performance, leading to constant or intermittent misfiring and rough idle situations.
- Difficulty starting the engine, or the complete stalling of the engine.
- Loss of operating power.
- Damage to the body of the spark plug, corrosion, the electrode or the entire spark plug itself.
If you are in search of alternatives, you may use NGK. In the world of spark plugs, they are recognized for their reliability and durability.
Cross Refrencing F6TC to NGK: What’s the Equivalent?
The BPR6ES spark plug is recommended as a replacement for the F6TC.
Specifications for Electric NGK BPR6ES
In this piece, we will discuss the set specifications for Electric NGK BPR6ES.
- Thread Size: 14 mm (Like the BPR6ES)
- Thread Reach: 19 mm (Like the BPer6ES)
- Hex Size: 21 mm (Like the BPR6ES)
- Heat Range: 6 (Like the BPR6ES)
- Seat Type: Flat (Like the BPR6ES)
- Electrode Type: Standard
These specifications enable the BPR6ES to be used interchangeably for various small engine applications along with F6TC. This makes it very convenient.
Why Choose NGK BPR6ES?
These are some of the main reasons the BPR6ES provides quality value in its line:
Performance: As with every NGK spark plug, the BPR6ES implements gear located ignition components to encourage combustion, while also balancing out the engine, thus bolstering its overall functionality.
Durability: NGK spark plugs are tough and built to last, allowing them to be used in extreme conditions with excessive, inaudible range temperatures.
Availability: Almost all auto stores have NGK spark plugs in stock, so they’re quite convenient to obtain.
Spark Plug Comparison Table
It’s important to understand how various spark plugs compare in terms of key features like thread size, heat range, and seat type. The table below highlights the key specifications for both the F6TC spark plug and its NGK equivalent, the BPR6ES, to help you make the right choice for your engine.
Feature | F6TC | NGK BPR6ES |
---|---|---|
Thread Size | 14mm | 14mm |
Thread Reach | 19mm | 19mm |
Hex Size | 21mm | 21mm |
Heat Range | 6 | 6 |
Seat Type | Flat | Flat |
Electrode Type | Standard | Standard |
Other Compatible NGK Spark Plugs
While NGK BPR6ES is the most frequently suggested replacement for the F6TC spark plug, depending on the engine model, other NGK spark plugs may be suitable too. Suitable additions for your engine consist of:
NGK BPR5ES: This plug is one range colder in heat range which is perfect for high performance and extreme engine conditions.
NGK BPR7ES: This is a colder spark plug which is ideal for higher engine temperatures.
NGK BP6ES: This is a direct replacement and interchangeable with other small engine applications.
It is always a good idea to check the engine manual. This way you confirm that the NGK spark plug you intend on using is the correct one for your device.
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Frequently Asked Questions
Here are some FAQs about f6tc spark plug ngk equivalent –
1. Can I replace F6TC with NGK BPR6ES?
Indeed, NGK BPR6ES is a direct replacement for F6TC spark plug as both share the specifications of most small engine applications.
2. How do I know if the spark plug is the problem?
If your engine is misfiring, stalling, or is difficult to start, the spark plug may be to blame.
Remove and check for stuck carbon and any damage such as wear.
3. When should I think about replacing my spark plug?
You should replace it after the 100 and 200 hours mark of engine running time but this will vary with each manufacturer’s particualr product documentation.
4. Should I gap my spark plug?
If the gap comes preset, it’s fine to leave the NGK spark plugs as is. However, it is still the best practice to check the gap with the proper engine gap tool.
5. What is the consequence of over tightening the spark plug?
If the engine misfires, ensure the spark plug gap is correct and that the plug is installed properly. If the issue persists, check other engine components like the ignition system. Read more about Can Spark Plug Gap Cause Misfire?
Conclusion
For better performance of the engine, one simple change that can be done is to replace the F6TC spark plug with the NGK BPR6ES plug.
The most notable advantage of NGK is performance, longevity and ease of access, meaning that it is good for replacement for small engine plugs too. As long as installation and maintenance is done properly, the engine will be able to sustain and run efficiently for a long time.
Go through the manual of your engine to see the specifications and compatibility, and make sure to follow the steps for installation as closely as you can.. Even and consistent cleaning and maintenance of the spark plugs will help sustain the engine’s performance for a long time.