Suzuki Bolt, Lower Moun - 54166-90J10. OEM Mounting Bolt for Lower Engine Support. The Suzuki - Bolt, Lower Moun - 54166-90J10 is an original equipment manufacturer (OEM) fastener designed for securing the lower engine mounting assemblies on Suzuki outboards. Built to match precise factory specs, this bolt ensures a strong, stable connection where it matters most-at the foundation of your engine's structural integrity. It's engineered to resist the stress of vibration, torque, and harsh marine e