A spark plug produces a spark at a specific time to ignite the air-fuel mixture inside the Predator’s combustion chamber. This spark allows the fuel and air inside the engine to combust, in turn producing mechanical energy.

In this article, I’ll be showing you the correct spark plug type, the best spark plugs, the correct spark plug gap and a guide on how to change the spark plug of a Predator 212 engine.

Spark Plug Type

Predator 212 engines are compatible with a specific type of spark plug that are referenced as NGK BP6ES and NHSP/Torch F6TC. Both of these spark plugs share the same specifications and properties. Below, you’ll see an explanation on how to read it.

The spark plug type BP6ES stands for the corresponding terms and values:

• B = Shell (14 mm x 13/16”)
• P = Insulator (Projected)
• 6 = Heat Range (2 – 12)
• E = Reach 19 mm (3/4″)
• S = Firing End 2mm (Copper Core)

You’ll need to make sure that any replacement spark plug matches the shell dimensions, has a projected insulator, supports a heat range of 6, has a reach of 19 mm and has a 2 mm firing end made of a copper core.

Best Spark Plugs for Predator 212 Engines

There are various spark plug manufacturers on the market that offer a wide variety of spark plugs for the Predator 212. However, I strongly suggest sticking to the Predator’s recommended specifications. The one below is what I use for my Predator 212 engine.

The spark plug that Predator recommends in the owner’s manual, is the NGK BP6ES. They can be quite hard to find, as you’ll need to ensure that the gap is within the recommended range. Therefore, I recommend the Autolite AR3910X Racing Spark Plug. It’s a high-performance spark plug that can even boost the overall engine output.

If you’re looking for a non-racing version, the E3.22 Spark Plug is also a good choice. Both of these spark plugs are fully compatible with the Predator 212 engine and tick all the boxes in terms of shell size, insulator type, heat range, reach and firing end material.

Spark Plug Gap

The recommended Predator 212 spark plug gap is 0.027” – 0.031”. The spark plug gap (also known as electrode gap) is the physical distance between the ground electrode and the center electrode. To further understand what a spark plug gap is, use the illustration below.

It’s important to use a spark plug that has a gap between 0.027” – 0.031” for your Predator engine. If you’re replacing your spark plug make sure that the electrode gap is within the above range. Although a slightly smaller or larger gap may still cause your engine to run, it’s best to stick to the recommendations, due to the following reasons.

The reason why a spark plug needs to have a compatible gap is because the arc of the spark plug occurs in between the center electrode and the ground electrode. If the gap is too small, the spark would most likely be too weak for the Predator 212 engine and can cause poor performance.

Conversely, if the spark plug gap is too large, the spark may be too strong and eventually cause your Predator 212 engine to overheat.

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