The Yamaha magnetic gearcase oil plug is a genuine drain and fill plug for the gearcase of many Yamaha outboards.
The magnet collects metal particles carried in the gearcase oil, so inspecting the plug at an oil change also tells you about the condition of the gearcase. The plug is used on many Yamaha engines and gearcases in the roughly 20–250 hp range, depending on model and year. The thread is M8 x 1.25. Always verify fitment against the engine's parts catalogue.
Part numbers and references:
- Yamaha OEM number: 688453411000
- Previous Yamaha numbers: 688-45341-00-00, 90340-08M02-00
- Aftermarket numbers: Mallory 9-72652
Please check fitment against your engine model and model year before ordering. Genuine Yamaha part.