Mercury 25XD Short Tiller – 2S (M16990)

Mercury 25XD Short Tiller – 2-Stroke (M16990) is a high-performance and compact outboard motor designed for small to medium-sized boats. Known for its durability and responsive power delivery, this 2-stroke engine is ideal for anglers, utility boat operators, and recreational boaters who value simplicity and robust performance.

Specifications

• Engine Type: 2-Stroke, Carbureted
• Horsepower: 25 HP
• Controls: Tiller handle
• Shaft Length: Short (15 inches)
• Fuel Type: Gasoline (Oil-gas mix, typically 50:1 ratio)
• Weight: ~112 lbs (51 kg)
• Ignition System: CDI (Capacitor Discharge Ignition) for reliable starts
• Cooling System: Water-cooled with thermostat control

Features

Compact and Lightweight:

• At just over 112 lbs, this motor offers impressive portability and ease of installation.

Tiller Handle Control:

• Ergonomically designed tiller with integrated throttle and shift controls for precise handling and easy operation.

High Power-to-Weight Ratio:

• The 2-stroke design delivers excellent acceleration and top-end speed for boats of varying sizes.

Durable Construction:

• Built with corrosion-resistant materials for extended use in both freshwater and saltwater environments.

Simple Maintenance:

• Straightforward 2-stroke design makes for easy and cost-effective upkeep.

Short Shaft:

• Ideal for boats with lower transoms, providing efficient propulsion and optimal performance.

Applications

• Fishing Boats: Suitable for powering small to medium aluminum or fiberglass fishing boats.
• Dinghies and Tenders: A powerful option for slightly larger dinghies and portable setups.
• Utility Boats: Reliable for heavy-duty tasks and medium-range transport.

Performance and Efficiency

• Power Output: The 25HP engine provides plenty of thrust, ensuring great performance even with moderate loads.
• Fuel Economy: While less efficient than 4-stroke motors, the 2-stroke engine balances power and fuel use effectively for short trips.
• Noise and Vibration: Typical for a 2-stroke motor but manageable for its size and application.

Maintenance Tips

Fuel Mixture:

• Use high-quality 2-stroke oil and gasoline mixed at the recommended 50:1 ratio for optimal performance.

Cooling System Care:

• Flush the cooling system with fresh water after use in saltwater to prevent corrosion and buildup.

Spark Plug Maintenance:

• Inspect and replace spark plugs regularly to ensure consistent ignition.

Propeller Checks:

• Inspect the propeller for damage or debris that might reduce efficiency.

Annual Service:

• Schedule regular maintenance to check seals, gaskets, and other vital components.

Market Information

• Price Range (Used): $1,500–$3,000 USD, depending on condition and hours of use.
• Availability: Frequently found in the secondhand market or through marine equipment dealers.
• Resale Value: Retains strong resale value due to its reliability and performance.

Pros and Cons

Pros:

• Lightweight and compact for its power class.
• Strong acceleration and responsive handling.
• Simple and affordable to maintain.
• Robust construction for long-term durability.

Cons:

• Requires pre-mixed fuel, which can be less convenient.
• Higher emissions and noise compared to 4-stroke motors.
• Less fuel-efficient than newer engine technologies.

Notes

Mercury 25XD Short Tiller – 2S (M16990) is a trusted and high-performing outboard motor for those seeking dependable power in a compact package. Its rugged design and straightforward operation make it a favorite among recreational and utility boat users. Mercury 25XD Short Tiller – 2S (M16990)