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
The Mercury 250 HP Pro XS is a high-performance V-8 outboard engine built for serious boaters who demand fast acceleration, strong torque and reliable power on the water. Engineered as part of Mercury’s Pro XS performance line, this 4.6 L V-8 uses advanced fuel injection and tuning to deliver crisp throttle response, impressive hole-shot performance and excellent speed whether you’re chasing fish or running long distances.
Designed with tournament anglers and performance enthusiasts in mind, the Pro XS 250 combines a lightweight, conventional midsection with a robust gearcase and adaptive technologies like Adaptive Speed Control (which maintains a set RPM regardless of changes in load) and Transient Spark Technology (which optimizes ignition timing for extra torque on acceleration).
Premium features such as a powerful alternator with Idle Charge battery-management, SmartCraft digital compatibility, and a performance-tuned exhaust give this outboard a balance of power, reliability and efficiency.
With options for hydraulic, power or tiller steering and multiple shaft lengths, the 250 HP Pro XS is equally at home on bass boats, bay boats or larger performance rigs.
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.
