91305-KT7-003 O-Ring (37X2.4) - Overview. The 91305-KT7-003 O-Ring (37X2.4) is a critical component designed for Honda marine engine systems, specifically supporting various engine and transmission applications where a precise sealing solution is essential. Acting as a high-quality seal, it prevents leaks by creating a watertight or airtight barrier between mating components, ensuring the marine engine operates reliably and efficiently. Manufactured to exact factory specifications, this O-Ring m