B6S 3510 NGK Spark Plug for inboard/outboard, golf cart, lawn mower, chainsaw, and various power equipment Engines.

Equivalent to Mercury Marine 33-813469, OMC 509566, Yamaha B6S-00000-00-00.

The price is for one plug.

Thread diameter: 14mm
Thread pitch: 1.25mm
Seat type: gasket
Reach: 9.5mm (3/8")
Hex size 13/16" (21mm)
Terminal type: removable nut
Gap: .028" (.7mm)

Please check the part numbers for your specific fitment needs.

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cat-E67