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Mercury FourStroke 15HP Manual Starting Outboard Engine

Lightweight and powerful 15 HP outboard motor with EFI:

  • Lightweight: Weighs just 99 lbs, making it easy to transport and launch.
  • Durable: Built with a single-cylinder engine and water-cooled cooling system.
  • Low maintenance: Requires less frequent oil changes and tune-ups than a 2-stroke engine.
  • Warranty: 3 years warranty.

The Mercury 15HP outboard motor manual starting is a lightweight, powerful, and reliable. It features a 15 horsepower engine with a 20.3 CID displacement, making it ideal for small boats. The EFI fuel system provides efficient fuel consumption and reduced emissions, while the water-cooled design keeps the engine running cool even under demanding conditions.

What makes this outboard truly exceptional:

  • Lightweight and portable: The Mercury 15MH outboard motor weighs just 99 pounds, making it easy to transport and launch.
  • Powerful and efficient: The 15 horsepower engine provides plenty of power for trolling or cruising, while the EFI fuel system delivers up to 30% better fuel economy than traditional carbureted engines.
  • Reliable and durable: The Mercury 15MH outboard motor is built with high-quality materials and components, making it a long-lasting investment.
  • Easy to maintain: The Mercury 15MH outboard motor is designed for easy maintenance, with features like a quick-drain oil system and a low-maintenance air filter.


Feature Specification
Horsepower 15 HP
Engine type Inline 2
Displacement (CID/CC) 20.3 / 333
Full throttle RPM 5700-6200
Fuel induction system Electronic Fuel Injection (EFI)
Fuel tank External 3.2 gallon
Cylinder(s) 2 Cylinders
Bore and stroke 61 mm x 57 mm
Gearcase options Standard
Ignition system Digital CD Ignition w/Electronic Spark Advance
Induction scavenging SOHC
Valves per cylinder 2
Weight 99 lbs



15 HP

Shaft Length

15" (Short), 20" (Long)




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Frequently Asked Questions


What is the best type of RIB for me?

The best type of RIB for you depends on your boating needs and preferences. We offer a wide range of RIBs that are perfect for different types of boating activities.

What is the best outboard motor for my boat?

The best outboard motor for your boat depends on the size and weight of your boat, as well as your boating needs. We offer a wide range of outboard motors that are perfect for different types of boats.

How do I maintain my RIB?

To maintain your RIB, you should clean it regularly, check the tubes for leaks or damage, and store it properly when not in use.

How do I maintain my outboard motor?

To maintain your outboard motor, you should change the oil and filter regularly, check the spark plugs and fuel filter, and store it properly when not in use.

How do I winterize my RIB?

To winterize your RIB, you should drain all water from the engine and hoses, add fuel stabilizer to the fuel tank, and store it in a dry place.

What safety equipment do I need on my RIB?

You should have life jackets, flares, a fire extinguisher, a first aid kit, and an emergency beacon (EPIRB or PLB) on board your RIB.

What is the warranty on your RIBs?

Our RIBs come with a manufacturer’s warranty that covers defects in materials and workmanship.

How long does it take to service a RIB?

The time it takes to service a RIB depends on the type of service required. We offer fast and reliable service to get you back on the water as soon as possible.