5.44 HD

Gearcase

The 5.44 HD gearcase was designed and engineered by Mercury Racing for the most demanding offshore environments and features a larger 5.44″ diameter torpedo that provides extra lift for heavier boats. This is a highly durable gearcase for heavier center consoles, walkarounds, pontoons and deckboats.

Compatible Engines

450R

400R

300R

Hydrodynamics: Part 2 – The Science and Art of Gearcase Hydrodynamics

The gearcase is the one component of a high-performance sterndrive or outboard that is always in the water, and thus subject to drag, an important factor in hydrodynamics.

Prop School – Part 1: Introduction

Propellers are complicated, and levels of understanding vary widely. We revisit the basics and then dive deeper on propeller form, fit and function.

New 1.60:1 Sport Master 300R FourStrokes

Mercury Racing announce the release of six new 4.6L V8 300R FourStroke outboard models featuring a 1.60:1 gear ratio Sport Master gearcase.

Ready for Wide Open?

Connect with one of our authorized dealers to choose the right power for your build.