NGK CR6HSB 6500 Spark Plug Yamaha F4A F6A 4-Stroke Outboard
CR6HSB-NGK
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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.
OEM 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.
Questions & Answers
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.
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