Description
NGK CMR7H (stock no. 3066) is a high-quality standard spark plug engineered for reliable ignition performance across a wide range of small engines and powersports applications. Featuring NGK's proven nickel-alloy center electrode and a resistor core, this plug offers consistent starts, smooth idle, and long service life. Trivalent metal plating resists corrosion and seizing, while a solid copper core enhances heat dissipation.
- Standard nickel-alloy electrode with resistor for stable spark
- Solid copper core for superior conductivity and heat control
- Trivalent plating for corrosion resistance and easy removal
- Widely used in scooters, pit bikes, generators, and other small engines
- Sold individually (each)
Specifications
- Part number: CMR7H
- NGK stock number: 3066
- Thread: M10 x 1.0
- Reach: 12.7 mm (0.5 in)
- Hex size: 16 mm (5/8 in)
- Heat range: 7 (NGK)
- Gap: 0.7 mm (0.028 in)
- Resistor: Yes
Note: Check your owner's manual for the correct heat range and gap for your specific engine.
| Brand | Models / Series | OEM / Cross-Ref Plug Numbers |
|---|---|---|
| Husqvarna | 125B, 125BVX, 150BT, 150BF, 350BT, 350BF, 560BTS, 570BTS, 580BTS | 506615101, 521233401, 521 23 34-01 |
| Echo | PB-200, PB-201, PB-210, PB-215, PB-245, PB-251, PB-255, PE/GT/SRM trimmers using 90186Y | 90186Y |
| Stihl (aftermarket cross-reference) | BR 500, BR 550, BR 600 blowers; HL 90, HL 100; HS 81, HS 86 trimmers/hedgers | Replaces Stihl spark plug types in these models (verify OEM) |
| RedMax | EBZ 5150, EBZ 5150RH, EBZ 5100, EBZ 5000, BCZ/GTZ trimmers | 369991867, 544260901, 506615101, 870217001 |
| Jonsered | BB2250, BB2250HF, BC2250 trimmers/blowers | 506615101 |
| Shindaiwa | T230, T231, T242, T2510, C230, DH231 | 3699-91867 |
| Homelite / Jacobsen | Various older blowers and trimmers | 870217001, 870301002 |
| General Small-Engine Use | 2-cycle trimmers, blowers, hedge trimmers, pole saws with M10×1.0 threads & short-reach plug | N/A |
3066 made by NGK
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