NGK BPR7HS-10 Spark Plug for Mercury, Mariner, Nissan, Suzuki, and Tohatsu Outboards

The NGK BPR7HS-10 is a standard nickel spark plug built for reliable ignition performance in outboard and personal watercraft powerheads. It uses a solid copper core for superior heat dissipation and conductivity across a broad heat range, paired with nickel-plated ground and center electrode tips for corrosion resistance in the marine environment. The corrosion-resistant plating also makes the plug easier to install and remove during routine maintenance, which matters on outboards that see regular exposure to salt air and moisture.

This plug carries a 14 millimeter thread size and a standard ground electrode configuration, with a 5000 Ohm resistor design to help reduce electrical interference. It is built to the same specification NGK has supplied as original equipment across multiple outboard brands, so it delivers OE-level performance rather than a generic aftermarket substitute. Always confirm the correct plug against your engine and maintenance manual before ordering, since using the wrong plug can reduce fuel economy, cut engine performance, or cause engine damage.

Specifications

• Brand: NGK
• Manufacturer Part Number: BPR7HS-10
• Thread Size: 14 millimeters
• Resistance: 5000 Ohm
• Ground Configuration: Standard
• Ground Electrode Core Material: Nickel
• Center Electrode Core Material: Copper
• Center Electrode Tip Material: Nickel
• Gap Size: 20.8 millimeters
• Weight: 0.15 pounds
• UPC: 087295110928

Fitment

• Personal watercraft - 1990-1989 Power Board
• Outboard - 2002-1990 Mariner
• Outboard - 2006-1988 Mercury
• Outboard - 2007-1997 Nissan
• Outboard - 2002-1999 Suzuki
• Outboard - 2007-1997 Tohatsu

Replaces (OEM)

• A0001591503
• A0001594303
• A0021597203
• 1214023
• 1214805

Frequently Asked Questions

What is the part number for this NGK spark plug? The public part number is BPR7HS-10, an NGK standard nickel spark plug with a 14 millimeter thread size.

Will the BPR7HS-10 fit my Mercury outboard? Yes, NGK lists this plug as fitting Mercury outboards from 2006 through 1988.

Does this plug work on Mariner outboards? It does, covering Mariner outboards from 2002 through 1990.

Is the BPR7HS-10 compatible with Suzuki or Tohatsu outboards? Yes. Suzuki outboards from 2002 through 1999 and Tohatsu outboards from 2007 through 1997 are both listed as fitting the BPR7HS-10.

What is the electrode material on this spark plug? The BPR7HS-10 has a copper center electrode core with nickel-plated center and ground electrode tips for corrosion resistance.

Is this a resistor spark plug? Yes, the BPR7HS-10 has a resistance rating of 5000 Ohm to help reduce electrical interference.

What is the spark plug gap on the BPR7HS-10? This NGK spark plug has a gap size of 20.8 millimeters.

How much does the spark plug weigh for shipping purposes? The BPR7HS-10 weighs 0.15 pounds.

Is this a genuine NGK plug or an aftermarket copy? The BPR7HS-10 is a genuine NGK Standard spark plug, built to the same specification NGK supplies as original equipment.

What comes in the box with this spark plug? Each order includes one NGK BPR7HS-10 spark plug.

Does this plug fit personal watercraft as well as outboards? Yes, in addition to outboard fitment the BPR7HS-10 is listed for 1990-1989 Power Board personal watercraft.

Are there OEM cross-reference numbers for the BPR7HS-10? Yes, OEM equivalent numbers for the BPR7HS-10 include A0001591503, A0001594303, A0021597203, 1214023, and 1214805.