NGK BMR7A Standard Resistor Spark Plug (4226)
Original price was: £7.76.£3.76Current price is: £3.76.
NGK BMR7A Spark Plug – Stock No. 4226
The NGK BMR7A is a reliable, copper core spark plug designed for easy starting, stable idle, and consistent combustion. The built-in resistor helps cut electrical noise that can affect the ECU or ignition. It suits many small-capacity engines where a 14 mm, short-reach, gasket-seat plug is specified.
Use it to replace tired plugs, restore smooth running, and maintain performance. It is a standard heat range 7 on NGK’s scale, ideal for everyday use in engines that call for this spec.
- Resistor type for reduced radio interference and cleaner signals to the ECU
- Durable nickel alloy tip with copper core for reliable heat transfer
- Short 12.7 mm reach and gasket seat for common small engine heads
Technical Specifications
| Part Number | BMR7A |
| NGK Stock Number | 4226 |
| GTIN | 087295142264 |
| Category | 686 – Spark Plug |
| Thread Diameter | 14 mm |
| Thread Pitch | 1.25 |
| Reach (Thread Length) | 12.7 mm |
| Hex Size | 20.8 mm (13/16 inch) |
| Seat Type | Flat seat with gasket |
| Resistor | Yes (approx. 5 k?) |
| Heat Range | 7 (NGK scale) |
| Spark Gap | 0.7 – 0.8 mm (set to manufacturer spec) |
| Centre Electrode | Copper core |
| Electrode Material | Nickel alloy |
| Ground Electrode | Standard J-type |
| Insulator Projection | Non-projected |
| Terminal Type | Solid terminal |
| Shell Plating | Corrosion-resistant |
Fitment Guidance
Commonly used in small-capacity 2-stroke and 4-stroke engines, including many scooters, motorcycles, ATVs, karts, and garden equipment that specify a 14 mm short-reach gasket-seat plug. Always use the vehicle lookup to confirm fitment or check the Vehicle Fitment tab for full details.
The price displayed is for a single plug, please add the desired amount to your basket.
| Weight | 0.05 kg |
|---|---|
| Dimensions | 10 × 3 × 3 cm |
| Brand |
NGK-4226 Confirmed Fitment
Please note, this information is a combination of supplier provided compatibility data and our workshop expertise. While every effort has been made to ensure the accuracy of this information Progressive Parts Ltd are not liable for abnormalities or inaccurate data. Customers are wholly responsible for checking fitment for their vehicle. More information is available from our Terms & Conditions
UK Shipping
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Out of stock items are sourced from our extended inventory and supplier inventory where possible. These may require manufacturing or carry extended lead times which we endeavour to alert you about if the website hasn't already provided an estimated delivery timescale.
DELIVERY INFORMATION
International Shipping
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If your delivery address is outside of the UK, local tax will be removed and you will have to pay import duties and taxes when the shipment reaches your country.
All international shipments may be subject to cross-border inspections by customs authorities while customs policies vary widely from country to country. You must meet any additional charges for customs clearance and we recommend that you contact your local customs office for further information.
DELIVERY INFORMATION
Returns
Progressive Parts operates a 14 day return period from the date of delivery for unused products.
Follow the returns process below for our team to generate you an RMA ID and instruct you to return the goods.
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Stock at Progressive Parts
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0 IN STOCK in orange means everybody we work with is unfortunately out of stock. Stock is not available in the UK. The best course of action is to place an order to create an allocation from the next batch arriving.
OUT OF STOCK in red. This product is unavailable to order, for whatever reason we're unable to obtain stock or there is an issue with supply/lead times.
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Type-approval then, is a certain guarantee that an end user will receive a product of OE equivalent performance attributes.
Products on the Progressive Parts website that meet this approval will be clearly marked or labelled EC or ECE approved.