2024 Mercury Marine® FourStroke 300 hp Base

Current Mercury Marine® Engines Outboard-Motors 175-400-HP FourStroke 300 hp

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Year 2024
Make Mercury Marine®
Model FourStroke 300 hp

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Product Details Specifications Photos

Year 2024
Manufacturer Mercury Marine®
Model Name FourStroke 300 hp
Trim Name Base
Generic Type (Primary) Four Stroke
Engine Type V-8
Engine Power 300 / 224
Displacement 279 CID (4.6 L)
Throttle RPM: 5200-6000
Oil capacity 7.0 Quarts (6.6 Liters)
Oil Type NMMA Certified FCW SAE 10W-30 | Integrated wet sump
Gear Ratio (Primary) 1.75:1 | Shift: F-N-R
Steering Hydraulic
Emissions CARB star rating: 3
Ignition SmartCraft PCM 112 Digital Inductive
Bore 3.6 in (92 mm)
Stroke 3.4 in (86 mm)
Cooling Water-cooled with thermostat
Exhaust Through prop

2024 Mercury Marine® FourStroke 300 hp

3.4L V6 and 4.6L V8

Reliability, flexibility, power and efficiency – all within your reach. Backed by decades of marine power innovation and product leadership, Mercury V8 and V6 FourStroke outboards deliver legendary performance and forward-thinking technology. FourStroke outboards are built for any body of water and a wide variety of boats.

Features may include:

Adaptive Speed Control

Adaptive Speed Control maintains a desired rpm regardless of changes in load or conditions without adjustments to the throttle lever position – a first for the outboard industry.

Smooth and Quiet

The V8 and V6 FourStroke engines are quieter and smoother than the leading competitor.

Easy to Maintain

The exclusive Top Cowl Service Door simplifies routine maintenance, letting you check or add engine oil without removing the top cowl. An hour-based maintenance schedule decal is located under the cowl, providing a quick overview of routine maintenance.

Industry-Exclusive Battery Management Technology

When battery voltage is low, engines will automatically increase idle rpm to boost alternator output and charge batteries to the proper level, protecting batteries from draining while trolling and operating electronic devices.

Ample Charging Output

FourStroke models feature a robust alternator that delivers 20 amps net of charging power at idle and 30 amps total at wide-open throttle.

Engine

Engine Type V-8

Engine Power 300 / 224

Displacement 279 CID (4.6 L)

Throttle RPM: 5200-6000

Oil capacity 7.0 Quarts (6.6 Liters)

Oil Type NMMA Certified FCW SAE 10W-30 | Integrated wet sump

Gear Ratio (Primary) 1.75:1 | Shift: F-N-R

Steering Hydraulic

Emissions CARB star rating: 3

Ignition SmartCraft PCM 112 Digital Inductive

Bore 3.6 in (92 mm)

Stroke 3.4 in (86 mm)

Cooling Water-cooled with thermostat

Exhaust Through prop

Electric

Alternator 85-amp (1071 Watt) with Idle Charge

Starter Electric Start with SmartStart Protection

Fuel System

Fuel System Air induction: Performance-Tuned Long-Runner Intake Manifold | Fuel induction system: Electronic Fuel Injection (EFI) Computer Controlled with Advanced Range Optimization

Fuel Type Recommended: Unleaded Regular 87 Octane Mini- mum (R+M/2) or 90 RON 10% Ethanol Maximum

Dimensions

Length Shaft: 20" (508 mm) | 25" (635 mm)

Weights

Dry Weight Lightest model available: 527 lbs (239 kgs)

Features

Features Engine protection operator warning system: SmartCraft Engine Guardian | Controls: Remote Mechanical or Digital Throttle & Shift (DTS) | Cylinder Configuration: V-8 [64 degree] with Dual Overhead | Trim system: 20° (-6° to 14°) | Tilt system: 73° (-6° to 67°)