2.5 HP Mercury 4 Stroke Outboard Short Shaft [ME 2.5 MH 4S]

2021 Model

  • 2.5 HP
  • 4 Stroke (40 percent less fuel!)
  • Short Shaft
  • Forward Neutral Shift
  • 3 years factory warranty!

Mercury 2.5 HP, 4-STK 2021 Short Shaft [ME2.5MH] 

Mercury Marine’s 4-stroke technology consumes 40 percent less fuel than 2-stroke models for extraordinary value and savings.

Engines surpass California Air Resources Board (CARB) 3-Star Rating, making them some of the cleanest running on the market-with 91% less emissions than traditional 2-stroke outboards!

The inherent 4-stroke characteristics of ultra-quiet, smoke-free operation, plus smooth idling and running make these engines a natural choice whether you’re trolling for fish or out just for fun. Clean running 4-stroke engines have a CARB three-star, ultra-low emissions rating. The decompression system and electronic CD ignition design ensure an easy, reliable start. One-stage over-rev protection and low oil pressure warning system provide extra peace of mind.

Key Features

  • Patented one-piece integrated cylinder block design provides added reliability by eliminating gaskets and fasteners and makes the powerhead much more compact and lightweight
  • Check oil level without removing the cowling with convenient, easy-to-view sight gauge
  • This engine delivers maximum performance with the largest displacement in the 2.5 hp category
  • A twist-grip throttle and 360-degree steering make it easy to use
  • For U.S. shipment ONLY


  • Engine Type: 4-stroke
  • Full Throttle RPM: 2.5hp: 4,500-5,500
  • Exhaust System: Above prop
  • Dry Weight: 38 lbs.
  • Start: Manual, with decompression system
  • Steering Type: Tiller with 360° turning
  • Gearing: F-N, 2.15:1
  • Trim Positions: 4
  • Tank Type: Integral fuel tank
  • Tank Capacity: 0.3gal.


Engine Type


RPM Range



Shaft Length

Standard Propeller

Tank Type

Tank Capacity

Trim Positions



Factory Warranty


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Frequently Asked Questions


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 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.

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.

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 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.

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