The Magnetic Drain Plug + Seal Kit from Buckshot Racing #77 includes two (2) precision-machined magnetic drain plugs and two (2) sealing gaskets, designed for Yamaha outboard lower units.
 
Compatible with a broad range of Yamaha 4-stroke and 2-stroke outboards, this kit is commonly used across popular models including the Yamaha V MAX SHO series (VF115, VF150, VF175, VF250), F150, F115, F300, F70, F25, F9.9, and the flagship 425 XTO Offshore.
 
The integrated magnets in the drain plugs serve as a valuable diagnostic tool—capturing ferrous particles suspended in the gear oil during normal operation.
 
During maintenance, users can check collected material by rubbing it between their fingers: if the residue dissolves easily, it’s typically normal clutch or friction plate material.
 
However, sharp or gritty debris may indicate gear or bearing wear. In such cases, refill with fresh gear lubricant, continue monitoring, and if metal particles persist, a gearcase teardown and internal inspection is recommended.
 
This drain plug kit also serves as a direct fit for the Buckshot Racing #77 Mercury V6 Propshaft Bearing Carrier (with integrated rear drain passage), compatible with Mercury 2-stroke V6 outboards in the 2.0L, 2.4L, and 2.5L engine families.
 
The included sealing gaskets ensure a secure, leak-free installation, making this kit a reliable upgrade for both Yamaha and Mercury applications that demand precision, durability, and preventative maintenance insight.
 
Part number cross-references:
18-2374, 18-2374, 688-45341-00-00, 688-45341-10-00, 9-72652, 90340-08M02-00
 
Please contact mike@buckshotracing77.com or call Mike at 714-697-1716 with any trim pump questions or needs.