Mercury - Manifold-water - 8M0129742 Cylinder Heads and Blocks for Yamaha Outboards Gearbox Oil (too viscous)

Gearbox Oil (too viscous)

but it puts your lower unit at risk for corrosion damage over time

Enhanced Corrosion Resistance – Built to withstand moisture

It fits a broad range of MerCruiser and Quicksilver inline four- and six-cylinder engines

you get lasting protection no matter how long you run

Mercury - Manifold-water - 8M0129742 Cylinder Heads and Blocks for Yamaha Outboards Gearbox Oil (too viscous)This product has been superseded by: 8M0155646 Manifold waterWARNING: This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings. ca. gov.