Used Main Wire Harness Assy 60V Yamaha 250hp-300hp Outboard 250-300 HPDI Wiring Posted on February 2, 2024 by admin Part: Yamaha 250hp-300hp 2 Stroke HPDI Main Wire Wiring Harness Assy. Inventory: Turk Tote 69. Location: Boat Trailer Store, Biloxi, Ms. NOTE: PLEASE see included pictures. Your item will come EXACTLY as pictured.