New
Honda15 HP
Honda BF15
2016 · gasoline
$2,200.00
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Used
Mercury
Mercury Pro XS 250 HP
$8,800.00
The Mercury Pro XS 250 HP is a high-performance four-stroke V-8 outboard engine designed for fishing boats and performance-oriented users, offering strong acceleration, advanced EFI fuel system, and digital SmartCraft compatibility.
Horsepower
250 HP
Fuel Type
gasoline
Year
2024
Hours
230
Displacement
4.6L
Stroke
4-stroke
Rated Output
186 kW/ 250HP
Rated Speed
6200
In Stock (3 available)
Free shipping on orders over $500
90-day warranty included
Description
Buy used Mercury 250 HP Pro XS outboard engines or explore new engines for sale built for high-performance boating and dependable marine power. The Mercury 250 HP Pro XS is a leading choice for buyers searching for performance outboard motors, replacement marine engines, and fuel-efficient V8 propulsion systems. Designed for fast acceleration, strong torque, and long-term durability, this outboard delivers exceptional performance for serious anglers and demanding boating applications.
The Mercury 250 HP Pro XS outboard is engineered to provide powerful acceleration, responsive handling, and dependable operation across changing marine conditions. Built as part of Mercury’s performance-focused Pro XS lineup, this engine combines speed, efficiency, and refined marine control.
Powered by a 4.6-liter V8 four-stroke platform, the engine delivers strong low-end power, crisp throttle response, and consistent output throughout the RPM range. Advanced fuel delivery technology supports efficient combustion and dependable performance during long runs and everyday operation.
Adaptive Speed Control technology automatically maintains selected engine RPM despite changing load conditions to improve driving consistency and overall marine control. Transient Spark Technology enhances ignition timing to increase acceleration performance and deliver stronger torque when rapid throttle response is needed.
Built with a lightweight conventional midsection and durable performance gearcase, the Mercury 250 Pro XS provides efficient handling and dependable power transfer across a wide range of boating environments.
Additional premium features include SmartCraft digital compatibility for advanced engine monitoring, a high-output alternator with Idle Charge battery management, and a performance-tuned exhaust system for refined operation and improved efficiency.
Available with multiple steering configurations and shaft length options, the Mercury 250 HP Pro XS adapts easily to different vessel layouts and boating preferences.
Ideal for bass boats, bay boats, fishing vessels, and larger performance-oriented marine platforms, the Mercury 250 HP Pro XS remains a trusted solution for speed, control, and dependable long-term operation.
Key Features:
• Mercury 250 HP Pro XS V8 four-stroke outboard engine
• 4.6-liter V8 performance platform
• Advanced fuel injection system
• Adaptive Speed Control technology
• Transient Spark Technology
• Strong torque and rapid acceleration
• SmartCraft digital compatibility
• High-output alternator with Idle Charge
• Multiple steering and shaft configurations
• Suitable for performance and fishing boats
Specifications
SKUM0120
BrandMercury
CategoryOutboard Engines
ConditionUsed
Horsepower250 HP
Fuel Typegasoline
Year2024
Displacement4.6L
No. of Cylinders8 cylinders
Stroke4-stroke
Shaft Length20
Weight511.00 lbs
Hours230
Rated Output186 kW/ 250HP
Rated Speed6200
Cylinder Bore x Stroke92 mm × 86 mm
Combustion SystemElectronic Fuel Injection (EFI)
AspirationNatural
Alternator85-amp
Dry Weight232 kg/ 511lbs
ControlsMechanical
Frequently Asked Questions
What kind of engine is the Mercury Pro XS 250 HP?
The Mercury Pro XS 250 HP is a V-8, four-stroke outboard engine with a displacement of about 4.6 liters (279 CID), built for high-performance boating and tournament fishing.
How much horsepower does it deliver?
It delivers 250 horsepower, making it suitable for performance-oriented boats that need strong acceleration and top-end speed.
What type of fuel system does it use?
The engine uses Electronic Fuel Injection (EFI) with Advanced Range Optimization (ARO), which helps improve fuel efficiency and throttle response across a wide range of operating conditions.
What kind of fuel should I use?
Mercury recommends unleaded regular gasoline with a minimum octane rating of 87 (R+M/2), and some markets specify up to 90 RON with up to 10 % ethanol.
Is this engine good for fuel economy?
Yes. Thanks to Advanced Range Optimization and a high-performance EFI system, the Pro XS 250 offers competitive fuel economy for its power class at both cruise and wide-open throttle.
What are the recommended shaft lengths?
Common shaft lengths for this engine include 20-inch and 25-inch options, suitable for many boat transom heights.
How heavy is the Mercury Pro XS 250?
The lightest versions weigh around 505 lbs (229 kg) dry, without fuel or accessories.
Does it include digital monitoring and protection systems?
Yes. The engine is compatible with Mercury SmartCraft digital technology, including SmartCraft Engine Guardian, which provides warning systems and real-time engine data when paired with compatible displays.
What kind of controls and steering options are available?
You can rig this outboard with remote mechanical or digital throttle & shift (DTS) controls. Steering options include hydraulic (standard), power steering (optional), and big tiller for manual control.
Does it have trim and tilt features?
Yes. The Pro XS 250 supports power trim and tilt, allowing you to adjust the engine angle for better performance and shallow-water operation.
What are some performance-enhancing features?
Adaptive Speed Control – maintains set RPM regardless of load changes. Transient Spark Technology – optimizes ignition timing for better hole-shot torque and acceleration. Performance-Tuned Exhaust – for a sporty exhaust note and optimized airflow. High-output alternator with Idle Charge technology for robust electrical support.
Is this engine suitable for tournament fishing and performance boats?
Yes. The Pro XS line is engineered for competitive anglers and performance enthusiasts, with strong acceleration, reliable mid-range torque, and advanced fuel management.
What maintenance does the Pro XS 250 require?
Routine maintenance includes: Regular engine oil and filter changes Gearcase oil checks and replacement Spark plug inspection/replacement Fuel filter maintenance Cooling system and water pump inspections.
Is the engine ready for saltwater use?
Yes. Mercury outboards are designed with marine-grade corrosion resistance, but flushing with fresh water after saltwater use and regular corrosion protection are recommended for long life.
Is the Mercury Pro XS 250 reliable?
The Pro XS series has a reputation for high performance and solid reliability when maintained properly, though like any performance outboard, regular service and diagnostics are key to long-term durability.
