Upgrade your Yamaha 150HP outboard motor with this premium 2-piece trim cylinder end cap screw set. Precision-engineered from durable 304 stainless steel, these replacement caps are designed specifically for F150 series outboard motors from 2011-2017, including F150XA, F150XB, F150JA, F150JB, and LF150 variants. Each cap features an integrated oil seal system and precise threading for optimal fit and function. The robust construction ensures reliable performance in marine environments, while the careful machining maintains proper alignment with your trim cylinder assembly. These OEM-compatible parts are essential for maintaining the trim system's integrity on your outboard motor. Before purchasing, verify compatibility with your specific model year and configuration to ensure proper fitment. Perfect for both maintenance repairs and preventive replacements to keep your Yamaha outboard operating at peak performance.