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  Mercury Marine was founded in 1939. Mercury outboard motors are designed to be durable and reliable, according to Mercurymarine.com. They strive to provide a quiet, smooth ride. Mercury engines are also designed to run cleaner to protect the environment.
  
  

Mercury 115 HP EFI

• This inline four-cylinder engine generates 115 horsepower with a maximum of 5,800 to 6,400 RPM. The dual overhead cam has four valves per cylinder with a total of 16 valves. The alternator gets 50 amps of output, and the engine uses 87 octane gasoline. This engine weighs 399 pounds and is designed to be Smartcraft compatible.
  
  

Mercury 50 EFI

• This inline four engine gets 50 horsepower with a maximum range of 5,500 to 6,000 RPM. The single overhead cam uses two valves per cylinder for a total of eight valves. The engine uses 87 octane fuel and weighs 247 pounds. Boattest.com gives it a carburetor rating of three stars.
  
  

Mercury 75 EFI

• This inline four engine generates 75 horsepower with a maximum range of 5,000 to 6,000 RPM. The engine has a shaft length of 20 inches and a 2.33-to-1 gear ratio. It gets 50 amps of alternator output and uses 87 octane fuel. The engine weighs 399 pounds and utilizes the SmartCraft control system. Boattest.com gives it a three-star carburetor rating. The engine weighs 635 pounds.
  
  

Mercury OptiMax 90

• This inline three engine gets 90 horsepower with a maximum range of 5,000 to 5,750 RPM. The alternator gets an output of 60 amps, and the engine uses 87 octane fuel. It has a shaft length of 20 inches and a 2.33-to-1 gear ratio.
  
  

300 Verado

• This inline six-cylinder engine uses a dual overhead cam with four valves per cylinder. It generates 300 horsepower with a maximum of 5,800 to 6,400 RPM. It utilizes 87 octane fuel and has an electronic fuel injection system. It also features a water-cooled, thermostat controlled cooling system. The engine weighs 635 pounds.