Mercury 300CXL Verado Outboard 300hp | Digital Throttle and Shift, Electric Start, 25″ Shaft, Counter Rotation

Key Features

Exceptionally Smooth & Quiet: The Advanced MidSection (AMS) moves engine mounts aft and outward to virtually eliminate vibration. Engine noise is minimized by a tuned multi-chamber air intake, fuel-injector covers that decrease high-frequency noise and a highly engineered cowl sealing system.

Effortless Operation: Verado outboards come standard with SmartCraft® Digital Throttle & Shift (DTS) for ultra-smooth shifting, instantaneous throttle response, as well as electro-hydraulic, automotive-style power steering that provides precision handling.

Adaptive Speed Control: Adaptive Speed Control on V8 Verado outboards automatically maintains the set rpm even as load or conditions change, with no adjustments to the throttle lever position – a first for the outboard industry.

Advanced Sound Control: Change the exhaust tone of a V8 Verado outboard with industry-exclusive Advanced Sound Control. The dual muffler system allows users to toggle between an ultra-quiet mode and a deeper, sportier tone.

Exceptionally Smooth & Quiet
The rugged Advanced MidSection (AMS) mounting system cradles the powerhead to isolate vibration, while expert tuning minimizes engine noise and optimizes the sound quality for a more enjoyable boating experience.

 

Effortless Operation

Digital Throttle & Shift (DTS) controls deliver smooth, quiet shifting and instant throttle response, with zero hesitation. You can further enhance handling and performance with available Electric Steering for multi-engine boats. Whisper-quiet and ultra-responsive, the system consumes less than half the electrical power as electro-hydraulic steering. (Single-engine Electric Steering coming later this year.)

Joystick Piloting for Outboards

The industry’s most advanced Joystick Piloting system makes maneuvering in tight spaces as simple as nudging the joystick whichever direction you want the boat to go. The SmartCraft system takes it from there, providing unparalleled low-speed control for easy, confident docking.

Adaptive Speed Control

The Adaptive Speed Control (ASC) feature lets you maintain engine rpm despite changes in load or conditions. Climbing large swells is easier. Cruising at low speeds is smoother. Carving out tight turns is effortless. You just point the bow toward your destination, and Verado takes it from there.

Advanced Sound Control

Choose the sound that moves you with the industry-exclusive Advanced Sound Control feature. It lets you toggle between a whisper-quiet exhaust tone or a throatier growl at startup and idle, for those times you truly want to hear the horsepower.

 

IMPORTANT NOTE:

All new Mercury outboards are required by Mercury Marine to have a certified technician PDI (Pre Delivery Inspection) the engine after installation to have the warranty activated.  This not only ensures the product is set up to the manufacturer's specifications but also allows us as a dealer to ensure that the installation was done correctly.  If the engine is purchased and installed by us, it is standard procedure for us to perform the PDI.  If the engine is purchased and is installed by the consumer or non-dealer, the engine must be taken to another authorized Mercury dealer or to us to be inspected and registered to have the warranty activated.
There will be a small fee associated with the purchase of the engine if we are not doing the installation and if the consumer decides to have us register it.

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Mercury 300CXL Verado White V-8 Four Stroke

Motor Specifications

• Horsepower: 300hp
• Cylinders: V-8
• Shaft Length: 30″ X-Long
• Steering: Digital Throttle & Shift
• Starting: Smart Start Electric
• Weight: 610 lbs
• Maximum Trim Range: 20° (-6° to 14°)
• Maximum Tilt Range: 73° (-6° to 67°)
• Alternator: 115 amp / 1,449 watt with Idle Charge
• Full Throttle Range: 5200 – 6000 rpm
• Displacement: 4.6 L
• Fuel System: Electronic Fuel Injection (EFI)
• Fuel Induction System: 32-valve, DOHC
• Warranty: Mercury Marine 3-Year Warranty
  
• Recommended fuel: Unleaded Regular 87 Octane Minimum (R+M/2) or 90 RON 10% Ethanol Maximum
  
• Recommended oil: NMMA Certified FCW SAE 25W-40 (Optional 10W-30 for Cold Conditions)
  
• Oil Capacity: 7.0 Quarts / 6.6 Liters
  

Standard Features

• Color: White (Cold Fusion or Warm Fusion)
• Digital Throttle & Shift
• Service Tool Kit & Parts
• Mounting Hardware
• Owner’s Manual

When it comes to the Mercury Verado outboard line, designations like XL, XXL, CXL (and even CXXL) mostly refer to shaft length / rigging height rather than major differences in the powerhead or core engine itself. Below is a breakdown of what each one means, what to look for, and how it may impact your application.

What the designations mean

XL: This stands for “Extra Long” shaft length. According to Mercury’s specifications, the XL version is generally built for a 25-inch shaft height (from anti-ventilation plate to transom) or 635 mm in metric.

XXL: This reflects a still longer shaft length (30-inch / ~762 mm) — used for boats with higher transoms or deeper mounting arrangements.

CXL: The “C” can denote “Cambered Skeg” or “Counter-rotation” or “Cambered/Canted” version of the XL rig. It’s used when specifying a rigging variation in the same power class with the extra-long shaft. For example, a Verado CXL might be the XL version but with cambered skeg (to allow tighter turning clearance) or counter-rotation for multiple engine setups.

CXXL: By extension, this means the “canted/cambered version of the XXL” shaft length. (Often appears in pricing lists).

Practical implications for you / what changes

Here are what you should pay attention to:

Transom height and mounting depth: If your boat or application has a higher transom or you’re mounting on a deep hull, you’ll likely need the XL or XXL version to ensure the propeller stays submerged properly and avoids ventilation.

Rigging complexity and cost: The longer shaft versions (XL, XXL) tend to cost more (you’ll see higher pricing on lists). For example, a pricing list shows F250 Verado V8: L version versus XL versus CXL versus XXL – the XXL (or CXXL) comes with a higher price.

Performance differences: Not inherent in the shaft length. That is, the core engine (power output, displacement, cylinders) is the same within a given horsepower class; the difference is the physical mounting/shaft length variant. So you shouldn’t expect big jumps in horsepower just because you choose XL vs XXL.

Multiple engine setups / counter-rotation: The “C” versions (CXL, CXXL) may often be configured for counter-rotation or special rigging for dual-engine installations. For example, a listing for 250XXL shows 30“shaft length specification.

Fitment & suitability: If the shaft is too short for the transom height, you risk cavitation, ventilation, reduced performance, faster wear. If you oversize shaft length you add unnecessary weight/drag or mismatched trim. So selecting the correct version is critical for optimum performance & longevity.

Recommendation summary

For your needs (assuming you are advising on selection, or dealing with marine products):

Choose XL when your boat’s transom height is moderate (around 25-inch space) and you want the “extra long” over standard.

Choose XXL when you have higher transom, deeper hull, or need the 30-inch shaft.

Choose CXL (or CXXL) when you have the same shaft height as XL/XXL but require special rigging features: cambered skeg, counter-rotation, dual-engine setup, etc.

Always ensure you are matching the rigging to the boat’s design (transom height, hull type, mounting height) rather than simply picking “the best” version.

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