NGK CR6HSB 6500 Spark Plug Yamaha F4A F6A 4-Stroke Outboard
CR6HSB-NGK
- Dispatched in 2-3 days
- 30 Day Return Policy
- In stock, ready to ship
- Backordered, shipping soon
NGK CR6HSB Spark Plug for Yamaha F4A and F6A
NGK Standard Nickel Spark Plug | CR6HSB / 6500
Genuine NGK CR6HSB resistor spark plug for selected Yamaha F4A and F6A portable four-stroke outboards. Its compact 10 mm shell, 12.7 mm reach and heat range 6 match the specified small-engine cylinder head.
Key Features
- ✔ Standard nickel spark plug
- ✔ Internal resistor reduces RFI
- ✔ 10 mm × 1.0 thread
- ✔ Short 12.7 mm reach
- ✔ NGK heat range 6
- ✔ Specified for selected Yamaha F4A/F6A four-strokes
Technical Specs
| NGK code | CR6HSB |
| NGK stock number | 6500 |
| Thread | 10 mm × 1.0 |
| Reach | 12.7 mm / 1/2 in |
| Hex | 16 mm / 5/8 in |
| Seat | Gasket |
| Heat range | 6 |
| Resistor | Yes |
| Gap | Set to Yamaha model specification |
Compatibility / Fitment Guide
Verified Yamaha applications: selected F4A and F6A portable four-stroke outboards for which Yamaha lists CR6HSB. Current F4/F6 product specifications also identify CR6HSB.
Year distinction: published Yamaha service charts show earlier F6 models using BR6HS-10 and later versions using CR6HSB. These plugs have different shell dimensions; read the complete model and production data before ordering.
Not interchangeable: CR6HSA is a different firing-end design, and BR6HS-10 uses a 14 mm shell. Fit only the exact code or an alternative explicitly approved in the Yamaha manual.
Part Number Cross Reference
| NGK part | CR6HSB |
| NGK stock | 6500 |
| Yamaha reference | CR6-HSB00-00-00 |
| 4Boats SKU | CR6HSB-NGK |
Cross-reference numbers identify applications; always confirm the engine model, serial range and plug specification before substitution.
Frequently Asked Questions
Does it fit every Yamaha F6?
No. Later F6A versions may specify CR6HSB, while earlier F6 engines can specify BR6HS-10.
Will it fit Yamaha F4?
It is verified for selected F4A/current F4 models; confirm the owner’s manual.
Can I use CR6HSA?
Only if Yamaha approves it for the exact engine; the suffix identifies a different plug design.
Is one plug enough?
F4A/F6A are single-cylinder engines, but confirm the engine specification and keep a properly gapped spare onboard.
Fit only the plug specified by the engine manufacturer. Check the gap before installation and use the torque stated for the engine’s cylinder-head material and service condition.
For the products under £150 the shipping is £6.99.
Free delivery for most items over £150.
