Give your 2021-2023 Yamaha AR250 the easy tune-up it deserves with cooling by swapping in every OEM part bundled in this service kit. Each component is matched to the twin 1.9 L engines, so you can knock out routine maintenance on the trailer and be back on the water before the weekend crowds roll in.. What's inside (and why it matters). Two gallons of Yamalube 10W-40 Mineral 4W - marine-grade oil that clings to moving parts and pulls heat away during long, high-rpm runs.. (2) 69J-13440-04-00 oil filters - deep-pleat elements trap fine metal and sludge that cheaper filters miss, keeping oil passages clear.. (2) 6S5-E4451-01-00 air filters - fresh pleated media restores unrestricted airflow for crisp throttle response.. (8) NGK LFR6A spark plugs - factory-gapped for quick, reliable ignition after a winter lay-up.. (2) 6AP-R1321-10-00 stainless impellers - renew water-pump pressure, boosting circulation and safeguarding temps with cooling efficiency.. Disposable Yamaha funnel - keeps oil