Yamaha - Gear - 66R-45560-01-00 Mercury-15HP-EFI-2012 SS 1/4" NPT female thread

SS 1/4" NPT female thread with 3/8" barb

and potential disconnection within your outboard engine

There’s a big difference between a thermostat that simply fits and one that’s engineered for your exact engine

This valve lets you shut off or regulate fuel flow when needed

Yamaha - Gear - 66R-45560-01-00 Mercury-15HP-EFI-2012 SS 1/4" NPT female threadYamaha Gear Lower Unit Gear Component 66R 45560 01 00 Overview The gear is a critical component within the Yamaha outboard lower unit, designed to transfer and manage engine power through the drivetrain. It works in coordination with other gears to ensure smooth operation, proper torque distribution, and efficient propulsion. Built to OEM specifications, this gear delivers precise engagement, durability, and reliable performance in demanding marine