NGK CR6HSB Spark Plug – Fits Yamaha Outboards 2.5–6HP (Replaces CR6-HSB00-00-00, 97523)
NGK CR6HSB Spark Plug – Fits Yamaha Outboards 2.5–6HP (Replaces CR6-HSB00-00-00, 97523) is backordered and will ship as soon as it is back in stock.
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Worry-free returns
You may return most new, unopened items within 7 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
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Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
NGK CR6HSB Spark Plug – Fits Yamaha Outboards 2.5–6HP (Replaces CR6...
Product Details
The NGK CR6HSB Spark Plug is designed for reliable ignition in Yamaha 4-stroke outboard motors from 2.5 to 6 HP, specifically for model years 2009 and 2014–2017. Its copper core and nickel alloy electrode ensure consistent performance and durability in marine environments.
This plug is a direct replacement for various OEM and aftermarket parts, including Yamaha CR6-HSB00-00-00 and NGK 97523.
- Built-in resistor helps suppress ignition noise.
- Comes pre-gapped at 0.9mm for straightforward installation.
- Alumina silicate ceramic insulator provides superior strength and heat transfer.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| NGK | CR6HSB |
| NGK | 6500 |
| NGK | 97523 |
| Yamaha | CR6-HSB00-00-00 |
| Yamaha | NGK-CR6HS-B0-00 |
| Yamaha | 94702-00372-00 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
This table covers confirmed Yamaha Outboard models. Compatibility with other years or models may exist but is not guaranteed.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Yamaha | F2.5BMH | 2.5 | 4-Stroke | 2015–2017 | CR6-HSB00-00-00 | |
| Yamaha | F2.5BMHL | 2.5 | 4-Stroke | 2015–2017 | CR6-HSB00-00-00 | |
| Yamaha | F2.5BMHS | 2.5 | 4-Stroke | 2015–2017 | CR6-HSB00-00-00 | |
| Yamaha | F2.5LMHB | 2.5 | 4-Stroke | 2015–2017 | CR6-HSB00-00-00 | |
| Yamaha | F2.5MHB | 2.5 | 4-Stroke | 2015–2017 | CR6-HSB00-00-00 | |
| Yamaha | F2.5SMHB | 2.5 | 4-Stroke | 2015–2017 | CR6-HSB00-00-00 | |
| Yamaha | F4BMH | 4 | 4-Stroke | 2014–2017 | CR6-HSB00-00-00 | |
| Yamaha | F4BMHL | 4 | 4-Stroke | 2014–2017 | CR6-HSB00-00-00 | |
| Yamaha | F4BMHS | 4 | 4-Stroke | 2014–2017 | CR6-HSB00-00-00 | |
| Yamaha | F4LMHA | 4 | 4-Stroke | 2014–2017 | CR6-HSB00-00-00 | |
| Yamaha | F4MHA | 4 | 4-Stroke | 2014–2017 | CR6-HSB00-00-00 | |
| Yamaha | F4SMHA | 4 | 4-Stroke | 2014–2017 | CR6-HSB00-00-00 | |
| Yamaha | F5AMH | 5 | 4-Stroke | 2014–2017 | CR6-HSB00-00-00 | |
| Yamaha | F5AMHL | 5 | 4-Stroke | 2014–2017 | CR6-HSB00-00-00 | |
| Yamaha | F5AMHS | 5 | 4-Stroke | 2014–2017 | CR6-HSB00-00-00 | |
| Yamaha | F6CMH | 6 | 4-Stroke | 2014–2017 | CR6-HSB00-00-00 | |
| Yamaha | F6CMHL | 6 | 4-Stroke | 2014–2017 | CR6-HSB00-00-00 | |
| Yamaha | F6CMHS | 6 | 4-Stroke | 2014–2017 | CR6-HSB00-00-00 | |
| Yamaha | F6LMHA | 6 | 4-Stroke | 2014–2017 | CR6-HSB00-00-00 | |
| Yamaha | F6MHA | 6 | 4-Stroke | 2014–2017 | CR6-HSB00-00-00 | |
| Yamaha | F6SMHA | 6 | 4-Stroke | 2014–2017 | CR6-HSB00-00-00 | |
| Yamaha | F4LMHA | 4 | 4-Stroke | 2009 | CR6-HSB00-00-00 | |
| Yamaha | F4SMHA | 4 | 4-Stroke | 2009 | CR6-HSB00-00-00 | |
| Yamaha | F6LMHA | 6 | 4-Stroke | 2009 | CR6-HSB00-00-00 | |
| Yamaha | F6SMHA | 6 | 4-Stroke | 2009 | CR6-HSB00-00-00 |
Technical Specs
- Product Type
- Standard Spark Plug
- Core Material
- Copper
- Center Electrode
- Nickel Alloy
- Insulator Material
- Alumina Silicate Ceramic
- Thread Size
- 10mm
- Thread Pitch
- 1.0mm
- Thread Reach
- 12.7mm (0.500 inch)
- Seat Type
- Flat Gasket
- Heat Range
- 6
- Hex Size
- 16mm (5/8 inch)
- Preset Gap
- 0.9mm (0.036 inch)
- Resistor
- Yes
- Resistor Value
- 5000 Ohm
- Ground Electrode Material
- Nickel
- Number of Ground Electrodes
- 1
- Warranty
- 1 Year Limited Warranty
What’s in the Box
- 1 x Spark Plug (CR6-HSB00-00-00)
Installation Notes
- Ensure the engine is cool and disconnect the battery for safety.
- Clean the area around the old spark plug to prevent debris from entering the cylinder.
- Carefully remove the spark plug boot, twisting gently if it's stuck.
- Using a spark plug socket, loosen and remove the old spark plug.
- Verify the gap on the new spark plug matches your engine's specification (preset to 0.9mm).
- Thread the new spark plug by hand to avoid cross-threading. It should turn easily.
- Tighten the plug with a torque wrench to the manufacturer's recommended specification.
- Re-attach the spark plug boot securely and reconnect the battery.
Troubleshooting & FAQ
How do I confirm this plug fits my Yamaha outboard?
Check your engine's model and year against the "Engine & Model Compatibility" table. You can also verify the part number in your owner's manual or by inspecting your current plug. This plug fits specific 2.5–6 HP 4-stroke models from 2009 and 2014–2017.
Is the spark plug gap preset?
Yes, this spark plug comes with a preset gap of 0.9mm (0.036 inch). While pre-gapped, it's always best practice to double-check the gap with a feeler gauge and adjust if necessary to match your engine's specific requirements.
What are the signs of a bad spark plug?
Common symptoms include difficulty starting the engine, rough idling, engine misfires, reduced power, and poor fuel economy. A visual inspection may show a fouled, burnt, or damaged electrode.
How often should I replace my outboard's spark plug?
For most recreational outboards, a good service interval is annually or every 100 hours of operation, whichever comes first. Refer to your owner's manual for manufacturer-specific recommendations.
What is the difference between this and an OEM spark plug?
This is an aftermarket replacement part, not an original equipment manufacturer (OEM) component. It has been engineered to meet or exceed OEM specifications using comparable materials and manufacturing processes to offer reliable performance at a better value.
How fast do you ship and what does it cost?
We ship worldwide quickly—typical transit is 5–15 days for most regions. Standard shipping is free. Expedited shipping options, if available for your location, will be presented at checkout.
What is your warranty and return policy?
This product is covered by a 1-year warranty against manufacturing defects under normal marine use. If you encounter an issue, contact our support team with your order details. Returns are accepted within our standard window for unused items in their original packaging. Please see our full policy page or contact us for instructions.
Safety & Important Info
- Verify images and specifications against your original part before purchase. If anything differs—even if your model appears compatible—do not purchase.
- This is an aftermarket replacement component, not an OEM part.
- Professional installation is recommended for safety and optimal performance.
About Sea Sierra
- Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.
- Fast Global Fulfillment — Free standard delivery to most regions in 5–15 days.
- Manufacturer-Direct Value — Fair pricing without compromising on materials or quality control.
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