Looking for a used Mercury 150 XL Pro XS OptiMax 150HP outboard motor with relatively low operating hours? This 2018 Mercury Pro XS OptiMax features a 2.5-liter V6 direct-injection engine, a 25-inch XL shaft, and approximately 127 reported engine hours. The package includes a Tempest Plus stainless-steel propeller, SmartCraft gauges, and wiring loom.
The Mercury 150 Pro XS OptiMax is a performance-oriented outboard designed for boat owners who want strong acceleration, responsive mid-range power, and dependable operation for compatible fishing and recreational boats. Unlike a conventional four-stroke engine, the OptiMax uses two-stroke direct fuel injection, delivering fuel through a specialized electronically controlled system.
This engine belongs to Mercury’s 150HP Pro XS range, a popular choice for compatible bass boats, fishing boats, and performance-oriented recreational vessels. Its V6 configuration provides substantial power for boats designed for a 150HP outboard, while the XL shaft measures approximately 25 inches (635mm), making it suitable for compatible extra-long-shaft transoms.
The package includes a Tempest Plus stainless-steel propeller and SmartCraft instrumentation. According to the seller, the complete wiring loom is also included, helping provide useful components for a compatible repowering project. Confirm that the supplied gauges, wiring, steering, and control systems match your boat before installation.
The seller describes the motor as an original, lightly used example with approximately 127 hours. A diagnostic printout dated July 6 reportedly shows no faults and 151 recorded engine starts. The report also indicates that much of the operating time occurred between 0 and 700 RPM, with approximately 60 hours between 3,000 and 3,900 RPM.
These figures are based on the seller’s description and should be checked against the original diagnostic report. A fault-free printout and relatively low hours are encouraging indicators, but they do not replace an independent mechanical inspection.
Whether you’re searching for a used Mercury 150HP outboard, a Mercury Pro XS OptiMax V6, or a 25-inch XL-shaft motor with instrumentation included, this package offers a combination of performance-oriented engineering and useful included equipment.
Product Specifications
Brand: Mercury Marine
Model: 150 XL Pro XS OptiMax
Year: 2018
Horsepower: 150 HP
Engine Type: 2-Stroke Direct Fuel Injection
Engine Configuration: 60° V6
Displacement: Approximately 2.5L / 2,507cc
Fuel System: OptiMax Direct Fuel Injection
Shaft Length: XL / 25″ / 635mm
Full-Throttle RPM Range: Approximately 5,250–5,750 RPM; confirm exact model specifications
Gear Ratio: Approximately 1.87:1 for the standard Pro XS configuration; verify installed gearcase
Alternator Output: Confirm against the exact model documentation
Starting System: Electric Start
Trim System: Power Trim
Propeller: Tempest Plus stainless-steel propeller included
Instrumentation: SmartCraft gauges included
Wiring Loom: Included
Reported Engine Hours: Approximately 127 Hours
Diagnostic Report: Seller reports no faults recorded
Reported Engine Starts: 151
Condition: Used; seller describes original, lightly used condition
Warranty: Not specified by seller
Key Features
Used Mercury 150 XL Pro XS OptiMax outboard motor, 2018 model year, 150HP V6 engine, 2.5-liter direct-injection powerhead, 25-inch XL shaft, approximately 127 reported hours, Tempest Plus stainless-steel propeller, SmartCraft gauges, wiring loom, seller-provided diagnostic printout, 151 recorded engine starts, reported fault-free scan, responsive acceleration, strong mid-range performance, suitable for compatible 150HP-rated fishing and recreational boats.
Why Choose the Mercury 150 XL Pro XS OptiMax?
The Mercury 150 XL Pro XS OptiMax 150HP outboard is designed for boaters who want responsive power in a performance-oriented package. Its V6 configuration and direct-injection technology make it a suitable option for compatible fishing boats and recreational vessels requiring 150 horsepower.
The Pro XS designation is associated with Mercury’s performance-oriented outboard range, intended to provide strong acceleration and responsive power delivery. Actual performance depends on the boat, propeller selection, mounting height, loading, engine condition, and operating conditions.
This particular package includes a Tempest Plus stainless-steel propeller, SmartCraft gauges, and wiring loom. Those components can be useful when setting up a compatible boat, provided that the supplied equipment matches the intended engine and helm configuration.
With approximately 127 hours reported, the motor may appeal to buyers who prefer a used Mercury 150HP outboard with a relatively limited operating history. An independent inspection remains important because engine hours alone cannot establish the condition of the powerhead, lower unit, fuel system, or electrical components.
2.5-Liter V6 Direct-Injection Engine
The Mercury 150 Pro XS OptiMax uses a 2.5-liter, 60-degree V6 two-stroke engine with direct fuel injection.
OptiMax technology uses an electronically controlled fuel-delivery system designed to provide controlled combustion and responsive engine performance. This configuration differs from Mercury’s later four-stroke 150HP outboards, so it should be listed accurately as an OptiMax two-stroke direct-injection engine.
Follow the applicable Mercury OptiMax owner’s manual for the specified fuel, oil, servicing, winterization, and operating requirements.
Pro XS Performance Configuration
Mercury’s Pro XS outboards are designed for boaters seeking responsive acceleration, strong mid-range power, and performance across the operating range.
The engine’s actual speed and acceleration will depend on boat design, loading, propeller pitch, mounting height, and mechanical condition. Verify that the fitted Tempest Plus propeller suits your boat and allows the engine to operate within the manufacturer’s recommended RPM range.
25-Inch XL Shaft
The Mercury 150 XL Pro XS OptiMax features a 25-inch XL shaft, approximately 635mm long.
Correct shaft length helps ensure suitable engine mounting and operation. Before purchase, check your boat’s transom height, mounting arrangement, steering system, and horsepower rating.
The model identification plate should also be checked to confirm the exact shaft and model configuration.
Tempest Plus Stainless-Steel Propeller Included
The package includes a Tempest Plus stainless-steel propeller, according to the seller.
Stainless-steel propellers can provide a durable option for performance-oriented applications when correctly selected for the engine and boat. Pitch, diameter, blade condition, and compatibility should be confirmed before installation.
If the existing propeller is not matched to the boat’s setup, a suitable replacement may be needed.
SmartCraft Gauges and Wiring Loom
This Mercury outboard package includes SmartCraft gauges and a wiring loom, as described by the seller.
Compatible SmartCraft instrumentation may display engine information such as RPM, operating hours, warnings, and other supported readings. The actual functions available depend on the gauges and engine configuration.
Confirm the exact gauge models, wiring loom, connectors, and compatibility with the engine and vessel. Additional adapters or components may be required for installation.
Engine Hours and Diagnostic Report
The engine is reported to have 127 operating hours and 151 recorded starts.
The seller’s diagnostic printout, dated July 6, reportedly shows no faults. It also indicates that much of the operating time occurred in the 0–700 RPM range, with approximately 60 hours between 3,000 and 3,900 RPM.
Request the original printout and verify that it corresponds to the engine’s serial number. Have a qualified technician inspect the engine’s compression, cooling system, fuel delivery, ignition components, lower unit, trim system, and electrical equipment before purchase.
Fuel and Maintenance
The Mercury OptiMax is a two-stroke direct-injection engine with specific fuel and oil requirements. Use the fuel grade and OptiMax-approved oil specified in the applicable owner’s manual.
Routine servicing should follow Mercury’s recommended intervals for the fuel system, spark plugs, oil system, cooling system, gear lubricant, and other applicable components.
Service records are useful for confirming maintenance history and helping identify any repairs or recurring problems.
Ideal Applications
The Mercury 150 XL Pro XS OptiMax may suit compatible bass boats, fishing boats, center consoles, and other vessels designed for a 150HP XL-shaft outboard.
Always verify the boat manufacturer’s maximum horsepower rating, transom height, engine mounting requirements, steering configuration, and propeller compatibility before installation.
Shipping & Availability
Contact Norman Outboards to confirm availability, exact model and serial numbers, updated engine hours, diagnostic printout details, SmartCraft gauge models, wiring loom contents, propeller specifications, inspection arrangements, shipping rates, and delivery estimates.
Worldwide shipping may be available depending on destination and carrier requirements. Freight, taxes, preparation, rigging, and installation may incur additional charges.
The used 2018 Mercury 150 XL Pro XS OptiMax 150HP outboard is offered with approximately 127 reported hours, a Tempest Plus stainless-steel propeller, SmartCraft gauges, and wiring loom. Buyers should verify the diagnostic report and mechanical condition before purchase.
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