BUHW-2 Spark Plug | NGK 5626Premium NGK spark plugs are known for their reliable performance and superior anti-fouling characteristics. NGK spark plug BUHW-2 Stock number 5626 14mm thread size 12.7mm thread length Gasket seat Surface gap 13/16 in. hex Replaces Mercruiser 33-58194, 33-97182, 33-97182Q, 33-97182B