NGK BR7HS-10 Spark Plug Tohatsu Nissan 9.9 15 18 25HP 2-Stroke

NGK BR7HS-10 Resistor Spark Plug for Tohatsu & Nissan Outboards

Genuine specification NGK resistor spark plug for selected carburetted Tohatsu and Nissan 2-stroke outboards. It provides the correct heat range, 1.0 mm preset gap and radio-frequency interference suppression required by the listed engine families.

Verified Engine Compatibility

• Tohatsu: M9.9D2, M15D2 and M18E2 2-stroke models
• Nissan Marine: NS9.9D2, NS15D2, NS18E2 and NS25C3 2-stroke models
• Verified catalogue year: 2003 applications; other production years may use the same engine family
• Quantity required: two spark plugs per listed 2-cylinder engine; this listing supplies one plug

Important: horsepower alone is not sufficient for identification. Check the complete model code and serial number on the outboard ID plate before ordering.

Technical Specifications

Check Before Ordering

1. Read the full model code from the engine identification plate.
2. Confirm that the engine is a carburetted 2-stroke model listed above.
3. Compare the existing plug designation and the service manual specification.
4. Order two plugs if replacing the complete set on a listed 2-cylinder engine.

Not suitable for: TLDI/direct-injection or 4-stroke engines. Do not order for a 50 HP outboard solely because the old listing covered that horsepower.

Frequently Asked Questions

Is this a resistor spark plug?
Yes. The “R” in BR7HS-10 identifies the resistor version, helping reduce electrical interference.

How many plugs are included?
One spark plug is supplied. The verified 2-cylinder applications normally require two plugs for a complete service.

Will it fit every Tohatsu between 9.9 and 25 HP?
No. Compatibility depends on the complete engine model and serial number, not horsepower alone.

Does it fit 50 HP Tohatsu engines?
No. Tohatsu 50 HP 2-stroke applications use a different heat-range specification; verify the exact engine manual before purchase.