In order to maintain optimal engine performance, it is crucial to have a dependable spark plug that can keep the engine running smoothly. The Champion QC12YC and RC12YC are two options that have established a strong reputation for their reliability and durability.
However, it is important to note that certain engines may perform better with either the QC or RC plug, while others may be unaffected by using either interchangeably.
To understand the differences between these spark plugs, let’s take a closer look at the factors that set them apart.
What Champion QC12YC Plug is used?
The Champion Copper Plus QC12YC is an excellent option for boosting the power of small engines and maximizing their performance. With its superior conductivity, this spark plug provides reliable performance throughout its lifespan.
Additionally, it features effective heat control that minimizes wear and tear. Its remarkable resistance to corrosion also makes it an ideal choice for smaller engines used in snow blowers, lawn mowers, and similar equipment.
What is the Champion RC12YC plug used for?
The Champion RC12YC plug is another reliable option for quickly and efficiently starting smaller engines. It also has a copper-core electrode that helps to reduce wear and extend the life of the plug.
This spark plug is designed to provide easy ignition for smaller engines in outdoor equipment. With its TinTac and Ultra Seal Shell construction, the RC12YC offers excellent resistance to corrosion, making it a durable choice for powering up small engines.
What does the Champion QC12YC fit?
The specifications for Champion QC12YC are as follows:
| Thread Diameter | 14mm |
| Threadreach | 19mm |
| Seat Type | Flat |
| Hexsize | 16mm |
| Tips Configuration | Projected |
| Construction | Standard |
| Terminal Type | Solid |
The Champion QC12YC spark plug is compatible with engines from Kohler, Briggs, and Husqvarna, as well as Briggs and Stratton engines. It can also serve as a substitute for other spark plug models such as NGK BKR5ES, Bosch FR8DC, and Brisk DR17YC.
What does the Champion RC12YC fit?
The specifications for RC12YC are as follows:
| Thread Diameter | 14mm |
| Threadreach | 19mm |
| Seat Type | Gasket Seat |
| Hexsize | 16mm |
| Tips Configuration | Projected |
| Construction | Standard |
| Type | Resistor |
The RC12YC spark plug is compatible with Briggs and Stratton gas engines such as Intek, Vanguard single cylinder, OHV, and Kohler gas engines, including Command OHV, K series, 16.0/TH16, and 18.0/TH18.
It can also be used as a replacement for other spark plugs, such as:
- ARIENS 21525900, 21536800
- BRIGGS & STRATTON 496055, 496055S
- Champion Gravely: 2829, RC12YC
- E-Z-GO 491055S
- GRAVELY: 21525900, 21536800
- HUSQVARNA 531 30 81-28, 531308128
Is the RC12YC the same as the QC12YC?
Both the Champion QC12YC and RC12YC spark plugs have the same heat range, which means they can be used interchangeably in most cases without affecting engine performance. So, if you are considering switching from one plug to the other, you can do so without any trouble.
Q-Type vs. R-Type
Both the QC12YC and RC12YC spark plugs are equally capable of providing reliable ignition for an engine, and they have similar construction and specifications. However, there is a slight difference between the two in terms of their design. The QC12YC is a wire-wound inductive coil spark plug that helps reduce radio frequency.
For fuel-injected systems
In general, the RC12YC and QC12YC spark plugs can be used interchangeably. However, if you have a fuel-injected engine, it is recommended to use the QC plug.
The internal electrical construction of the QC plug is better suited for fuel engines and can efficiently deal with noise that might harm a sensitive electronic circuit.
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What is a “projected tip” spark plug?
The QC12YC and RC12YC spark plugs have a projected tip, which is designed to offer better performance than non-projected plugs in certain situations. The projected tip design helps to keep the plug running cooler and provides a more efficient and balanced burn as the spark is located at the center of the combustion chamber.
This design enhances ignitability and ensures consistent and reliable start-ups.
QC12YC vs. RC12YC: Price Comparison
Both the QC12YC and RC12YC spark plugs from Champion’s Copper Plus line are affordable options with similar prices. The QC12YC typically costs around $7, while the RC12YC is priced between $8 and $9. You can check the current prices using the links provided in the post.
