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Mercury Outboard Engines & Components

Tame the waves with a Mercury Marine outboard motor at your back. Built in a range of sizes, builds, and displacements, durable Mercury engines serve you in a range of applications. Whether you need a powerful craft for commercial and athletic needs or something peppy for family outings, you will find a Mercury outboard that fits your needs.

What kinds of gearboxes fit your Mercury outboard? 

Mercury outboard motors come in a variety of shapes, horsepower (HP) ratings, and sizes. If you get a gearbox capable of harnessing your horses, you will improve your performance. You can use a variety of gearbox designs with Mercury engines. The following is a list of some common choices.

  • Torque master: 19-splined, stainless steel gearbox that offers extra durability, less slippage, and better performance than plastic or aluminum. This makes them a common choice for larger and heavier powerboats.
  • Sports master: Much like its cousin the torque master, the sports master features a stainless steel spline. This gearbox includes race-ready design factors like liquid-dynamic curves for less friction and more speed.
  • Heavy duty: This gearbox lives up to its nickname. Constructed of stainless steel, its design includes specially processed pinion gears and a gear ratio in the 1.75:1 range. The heavy duty gear ratio gives you a combination of performance and efficiency, ideal for high-HP crafts.

Do you need special propellers for Mercury Marine motors? 

Not necessarily, but Mercury provides you with specialized quick-replace propeller shafts. Unlike friction driven hubs, low-torque hubs use gear-splines for leverage and grip. The unique design of these propeller hubs lets you replace some propellers out in the field.

What are sacrificial anodes? 

Sacrificial anodes are special metals that are especially prone to corrosion. When mounted on less corrosion-prone materials, sacrificial anodes break down first. In the process, they protect the underlying materials from rust.

Do electronic ignition motors have back-ups?

Most do. Electric ignition engines use batteries for startup power, and if these batteries lose power it can be hard to find a jump on the high seas. To solve this potential problem, motor makers usually include manual start-up controls on smaller electric motors. When replacing your backup motor, look for models that offer hand-powered battery recharging.

Should your new engine be stronger than your last one?

It can be. If you opt for a larger replacement motor, you should check the power/HP ratings for your current craft. These numbers give you precise information about your boat’s performance limits, and they tell you how to coax more out of your current propeller.

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