NGK Spark Plugs - #1113 - BR7HS10S25 Blue Sea Systems BusBars 25" x 17 Pitch -

25" x 17 Pitch - EX1/EX2-1317 - 31431712

Improved water flow with rectangular cups will virtually eliminate water leakage for higher-pressure flushing

Removes coatings

Centrifugal impeller

Fits pre-1979 OMC/Johnson/Evinrude w/BRP/OMC controls

NGK Spark Plugs - #1113 - BR7HS10S25 Blue Sea Systems BusBars 25" x 17 Pitch -Standard spark plugs are chosen by more automotive, motorcycle and marine engine manufacturers than any other. The unique copper core and exclusive electrode design assure fast starts, peak performance and long life. Triple gasket sealing process eliminates gas leakage past the shell 99% Highly pure alumina silicate insulator Solid copper core Corrugated ribs to prevent flash over Cold rolled threads to prevent damage to cylinder head Trivalent