10 x NGK BPZ8H-N-10 Spark Plug 4495 for Mercury Mariner Outboard 40 50 60 115 125 HP
BPZ8H-N-10-NGK
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NGK BPZ8H-N-10 Spark Plug
Premium V-Power Marine Performance - SKU: 4495
The NGK BPZ8H-N-10 (Stock No. 4495) is a specialized "Z-type" marine spark plug engineered to provide exceptional resistance to carbon fouling, particularly during prolonged idling or low-RPM operation. Featuring NGK's patented V-Power technology, this plug directs the spark to the edge of the electrode for faster flame growth and improved ignitability in demanding marine environments.
Key Features
- β Trivalent metal plating for anti-seizing
- β Fouling-resistant "Z" type design
- β Solid terminal for secure connection
- β Corrugated ribs to prevent flashover
Technical Specs
| Thread Diameter: | 14mm |
| Thread Reach: | 12.7mm (1/2") |
| Hex Size: | 20.8mm (13/16") |
| Spark Gap: | 1.0mm (0.040") |
| Heat Range: | 8 |
| Resistor Type: | Inductive (35 Ohms) |
Compatibility / Fitment Guide
| Make | Model / Application | Notes |
|---|---|---|
| Mercury / Mariner | 40HP, 50HP, 55HP, 60HP (3-Cyl 2-Stroke) | Approx. 2001-2006 models |
| Mercury / Mariner | 115HP, 125HP (4-Cyl 2-Stroke) | Approx. 2001-2006 models |
| Mercury | 225HP (3.0L Work) | 1994-1997 models |
| Mercury | 6HP, 8HP, 20HP, 25HP, 30HP, 45HP | Various 2-Stroke / Jet / Sea Pro |
| Suzuki | Outboard Applications | Verify via cross reference |
OEM Cross Reference
| Mercury Marine OE: | 33-816837Q, 33-816837B2, 8168372, 852868139 |
| Champion: | QL78YC, 938M |
| Denso: | W24FPR-U10 |
| NGK Stock No: | 4495 |
Questions & Answers
Is this a genuine NGK part?
Yes, this is an authentic NGK product, the world leader in spark plug technology and an original equipment supplier to many outboard manufacturers.
How do I know if it is compatible?
We recommend checking the SKU (BPZ8H-N-10) and the Cross Reference list provided above. If your original plug matches these numbers, it is the correct fit for your engine.
What is the benefit of the "Z" type designation?
The "Z" type construction is specifically designed for marine applications to be more resistant to carbon fouling during low-speed trolling or idling compared to standard spark plugs.
Note: Please verify your original part number and manufacturer's recommended gap setting before installation. Visit 4boats.co.uk for more marine maintenance parts.
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