Sierra International 18-5709 Marine Rectifier for Johnson/Evinrude Outboard Motor Sierra Rectifier Meets or exceeds the original equipment quality Sierra part number: 18-5709 Interchangeable with the following: Arco AR104, CDI 153-1778, GLM 72350, Evinrude/Johnson 581778, Mallory 9-17201 Fit specific, check part numbers to ensure proper fit