This Genuine Tohatsu Marine Part is a main bearing with the part number 3T5-00113-0. It is designed specifically for Tohatsu outboard motors and is a crucial component for the engine's smooth operation. The main bearing provides support and reduces friction between the crankshaft and the engine block, ensuring optimal performance and longevity. It is a high-quality, durable part that meets Tohatsu's strict standards for reliability and performance. This main bearing is compatible with various Tohatsu outboard models, including the 31-855553A01.