Paquete de 4 tapones de drenaje para la unidad inferior marina para la caja de engranajes de motores fuera de borda Mercury MerCruiser, tamaño de rosca 3/8 x 16, con juntas, tornillos magnéticos y no magnéticos, kit para un sellado rápido a prueba de fugas y un mantenimiento sencillo.

4-Pack 3/8-16 Marine Lower Unit Drain Plugs ✔️ 4 plugs total: 2 magnetic, 2 non-magnetic with gaskets

These marine lower unit drain plugs seal drain/fill holes on outboard gear cases, helping you maintain a leak-free seal during oil changes and routine service. Designed for 3/8-16 threads, they fit many stern drives and outboard gear cases and are ideal for quick maintenance tasks.

✅ Thread size 3/8-16 for drain or fill holes with gasket seals
✅ Includes 2 magnetic and 2 non-magnetic plugs for different maintenance needs
✅ Made from stainless steel and rubber; durable, wear‑resistant, and leak-proof
✅ Magnetic plug collects metal particles from gear lube to help protect bearings
✅ Dimensions: non-magnetic Ø14 mm x 9 mm (0.55 in x 0.35 in); magnetic Ø14 mm x 17 mm (0.55 in x 0.67 in)

These marine lower unit drain plugs are perfect for boats with stern drives and outboard gear cases, especially when performing oil changes or routine maintenance in marina or workshop settings.

💡 What is a drain plug for a marine lower unit used for during oil changes on stern drives?

It’s a handy part that lets you drain old gear oil and reseal the opening quickly, keeping gear oil contained and preventing leaks.

• Handy for routine gear case maintenance on outboard stern drives
• Helps maintain seal integrity with gasket and proper thread engagement
• Magnetic version traps ferrous debris to protect bearings
• Compatible with common 3/8-16 drain holes in many marine units