2003 Mercury Racing 300X Outboard Motor – 149 Hours – Sport Master Lower Unit
$17,000.00
The Mercury 300X is a masterpiece of high-performance engineering, widely regarded as one of the most powerful 2-stroke outboards ever produced. This extremely clean and highly maintained unit features the sought-after Sport Master 1.62 lower unit, making it the ultimate choice for high-speed bass boats, cats, and performance hulls. With only 149 original hours, this engine offers a rare opportunity to own a legendary “Pro Max” era powerhouse in pristine condition.
Key Specifications Table
| Attribute | Value |
| Brand | Mercury Racing |
| Model | 300X (3.0L V6) |
| Year | 2003 |
| Horsepower | 300 HP |
| Hours | 149 Original Hours |
| Lower Unit | Sport Master (1.62 Ratio) |
| Cowling | Factory Alien Cowl |
| Condition | Pre-Owned – Extremely Clean |
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Description
Legendary Power: 2003 Mercury Racing 300X
Step into the elite tier of marine performance with this 2003 Mercury 300X. Known for its aggressive power curve and high-RPM reliability, the 300X is a favorite among performance enthusiasts. This specific engine has been meticulously maintained, featuring an incredibly clean Alien cowl, midsection, and skirts.
Recent Maintenance & Hardware: No expense was spared in keeping this motor in top-tier shape. The previous owner recently had all new oil lines installed from the oil pump to ensure long-term reliability. It comes equipped with a Mercury 1.62 Sport Master lower unit, designed for surfaced applications and high-speed stability.
Why Choose the Mercury 300X?
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Exceptional Power-to-Weight: Delivers massive 2-stroke torque that modern 4-strokes struggle to match.
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Low Hours: At only 149 hours, this engine is just getting started in its performance life.
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Sport Master Gearcase: The 1.62 ratio is the gold standard for high-speed hulls, offering reduced drag and superior handling.
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Pristine Aesthetics: From the clean alien cowl to the immaculate midsection, this motor looks as good as it runs.
Technical Specifications:
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Engine Type: 3.0L V6 2-Stroke EFI
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Max RPM: 6400–6800 RPM
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Fuel System: Electronic Fuel Injection (EFI)
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Exhaust: Through-Hub (Sport Master)
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Steering: External Hydraulic Compatible











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