Description
Overview:
The Genuine NGK BMR6A Spark Plug (NGK code 7421) is a high-quality ignition component for small petrol engines used across construction and garden equipment. Built with a durable steel shell and a glazed ceramic insulator, it provides a clean, reliable spark for smooth starting and steady running. This resistor-type plug helps reduce electrical interference with on-board electronics. It is commonly fitted to breakers, brushcutters, trimmers, hedge trimmers, chainsaws, plate compactors, and ride-on mowers. Suitable examples include the Atlas Copco Cobra TT and Stihl BG 60. As a Genuine NGK part, it is engineered to meet or exceed OEM performance, making it a dependable choice for routine servicing and keeping engines efficient under frequent use.
Key Features:
- Genuine NGK part for assured quality and compatibility
- Resistor type (R) to minimise radio-frequency interference
- Consistent ignition for easier starting and smoother idle
- Robust construction for long service life in demanding environments
- Helps reduce fouling and misfires in properly tuned engines
- Wide model coverage across construction and garden machinery
- Straightforward to fit with basic hand tools
- Engineered to meet or exceed OEM specifications
- Supports reliable performance with regular maintenance intervals
- Suitable for both 2‐stroke and 4‐stroke small engines where specified
Typical Applications:
Used in site breakers, compactors, brushcutters, strimmers, hedge trimmers, chainsaws, blowers, tillers, and lawn tractors. Ideal for professional users and homeowners maintaining equipment from brands such as Stihl, Atlas Copco, Echo, Husqvarna, Honda, Kawasaki, Makita, and Wacker. Helps restore dependable starting, smooth running, and efficient combustion during routine tune‐ups.
Also known as:
NGK BMR6A resistor spark plug, NGK 7421 plug, small engine spark plug BMR6A, replacement spark plug for compatible Stihl and Atlas Copco models.
Fits Models:
Atlas Copco Cobra TT, Stihl BG 60, Stihl BG 61, FS 36, FS 40, FS 44, FS 50, FS 51, FS 60, FS 61, FS 65, FS 80, FS 90, FS 96, FC 44, Agria 5100, Allen Scavenger, Allen Mini 17, Allen 22 Deluxe, Allen Domestic 22, Allen Reciprocator, Allen 215, Allen 216, Allen 218, Allen 218JLO, Allen 221, Allen 418, Allen 421, Allen Lawnranger, Allen Parkranger, Allen FTII, Allen Commander, Allen Merlin, Allen Merlin XL, Allen National 68, Greenfield 12, Allen Tiller 3, Allen Tiller 5, Atco 8HP, Atco 12HP, Atco Lawn Tractor, Atco Mitsubishi engines, Cobra BC270K, Cobra BC270KB, Cobra LRH270K, Cobra MT270K, Derbi 3230, Derbi 5240, Dolmar 101, Dolmar 104, Echo CS280E, Echo CS280EVL, Echo CS290EVL, Echo CS330EVL, Flymo Maxi Trim, Flymo Maxi Trim Super, Flymo Chevron 420GL, Flymo RL420, Flymo RL420PDE, Contractor GCL75, Lawn Tractor LT10/36, Lawn Tractor LT12/36, Lawn Tractor LT12/38, Honda ED350, Honda ED400, Honda EX350, Honda GV200, Honda GV400, Husqvarna T250, Husqvarna T300, Husqvarna T520, Husqvarna T560, John Deere 225, John Deere 325, John Deere 375, John Deere 500, John Deere 650, John Deere FB-460V, Jonsered GR26L, Jonsered GR26D, Jonsered GR26C, Jonsered GR32D, Jonsered GR36, Jonsered GR41, Jonsered GR44, Jonsered GR50, Jonsered GT21L, Jonsered GT22L, Jonsered GT24L, Jonsered GT26L, Jonsered GT32L, Kawasaki KBH43-A, Kawasaki KBH48-A, Kawasaki GA550A, Kawasaki GD550A, Kawasaki GD700A-S, Kawasaki FD440V, Kawasaki FD501D, Kawasaki FD501V, Kawasaki FD590V, Kawasaki FD611V, Kawasaki FD661V, Kawasaki TH43D, Kawasaki TH48D, Kawasaki TJ27E, Makita DCS 330TH, McCulloch BP30AV, McCulloch BP38AV, McCulloch PMAC 38AV, McCulloch SMAC 30/AV, McCulloch TRIM MAC 24, McCulloch TRIM MAC 26, Mitsubishi TL26, Mitsubishi TL33, Mitsubishi TL43, Mitsubishi TL52, Partner 225, Pioneer Farmsaw II, Pioneer P26, Pioneer P28, Pioneer P35, Pioneer P41, Robin NB211/A/AV/AW, Rover 2‐Stroke, Sarp VS250MS, Sarp VS250MT, Sensation (Honda GV150 engine), Shindaiwa 22C, Shindaiwa C20, Shindaiwa C25, Shindaiwa C35, Shindaiwa C230, Shindaiwa C270, Shindaiwa C350, Shindaiwa RC45, Shindaiwa B530, Shindaiwa B450, Shindaiwa F18, Shindaiwa F20, Shindaiwa F21, Shindaiwa T18, Shindaiwa T20, Shindaiwa T25, Shindaiwa HT-20, Shindaiwa HT-230, Shindaiwa HT-231, Shindaiwa ES726, Shindaiwa T230, Stihl BG60, Stihl BG61, Stihl FC44, Stihl FS36, Stihl FS44, Stihl FS40, Stihl FS51, Stihl FS60, Stihl FS61, Stihl FS65, Stihl FS96, Stihl FS56, Tanaka JEA-50, Tanaka TEA-500, Tanaka TEA-50, Tanaka TED-262DH, Tanaka TED-262L, Tanaka TED-262R, Tanaka TBC-2500, Tanaka ECS-3301, Tanaka ECS-3351, Tanaka TCS-3401, Tanaka THT-262, Tanaka TOB-120, Tanaka TOB-175, Tanaka TOB-300, Wacker PD2B, Wacker PD3B, Wacker VPG155/160B, Wacker VPB1960, Wacker VPB1750
Alternate Part Numbers:
4112 400 7001, 4112-400-7001, 41124007001
Product Specifications
| L&S Part No. | BMR6A |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | NGK |
| OEM No. | 7421 |
| Unit of Sale | 1 |
| Applications | 104, 12HP, 216, 218, 218JLO, 221, 325, 375, 418, 421, 500, 5240, 650, ATCO8HP, Allen 215, Atco 8HP, B450, BC270KB, BG 60, BG 61, BG60, BG61, BP30AV, BP38AV, COBRATT, CS280E, CS280EVL, CS290EVL, CS330EVL, Cobra TT, DCS 330TH, ED350, ED400, EX350, FC 44, FC44, FD440V, FD501D, FD501V, FD590V, FD611V, FD661V, FS 36, FS 40, FS 44, FS 50, FS 51, FS 60, FS 61, FS 65, FS 80, FS 90, FS 96, FS36, FS40, FS44, FS50, FS51, FS56, FS60, FS61, FS65, FS80, FS90, FS96, FTII, GA550A, GD550A, GD700A-S, GD700AS, GR26C, GR26D, GR26L, GR32D, GR36, GR41, GR44, GR50, GT21L, GT22L, GT24L, GT26L, GT32L, GV200, GV400, KBH43-A, KBH43A, KBH48-A, KBH48A, Maxi Trim, Merlin XL, PD2B, PD3B, PMAC 38AV, RL420, RL420PDE, SMAC 30/AV, T250, T300, T520, T560, TH43D, TH48D, TILLER5, TJ27E, TRIM MAC 24, TRIM MAC 26, Tiller 5, VPB1750, VPB1960, VPG155/160B |
| Machine Type | Breakers, Blower/Shredders, Brushcutters, Lawn Tractors, Chainsaws, Tillers |
| Fits Models | Cobra TT | FS36, FS40, FS44 | BG60, BG61 | FS50, FS51 | FS60 | FS61 | FS65 | FS80 | FS96 | FC 44 |
