The Noram Star was originally designed for the Tecumseh star engine. The Tecumseh Star was one of the first to be considered a big block engine due to its heavy-duty 1” crankshaft. The Noram Star Clutch lives on past the Tecumseh and is commonly used in lawnmower racing especially vertical shaft engines. These clutches have handled everything from big-block hondas and clones to powerful V-Twin lawnmower engines.