Fixing a leaky or worn trim/tilt cylinder on your Yamaha outboard? This repair kit has the specific small end cap (the 'screw') you need. The part number is 65W-43821-00, and it's compatible with Yamaha 65W series Trim Tilt assemblies. It fits 2-stroke (2T) 30HP and 40HP motors, and 4-stroke (4T) 25HP, 30HP, and 40HP motors. The kit isn't just the cap; it includes all the seals for a proper repair: 1x SCREW (65W-43821-00), 1x SEAL (65W-43812-00), and 1x O-RING (65W-43865-10). It's a high-quality, direct replacement that offers great value compared to dealer prices. Installation is straightforward if you're familiar with the system. A crucial reminder: PLEASE double-check your motor's OEM part number before buying to ensure 100% compatibility. If you're unsure, message us with your full engine model or VIN for confirmation. Get your boat's power trim working smoothly again.