Mercury 300HP 300L White 4-Stroke Outboard – 20″ Shaft
The white 300-horsepower Mercury 300L four-stroke outboard uses a 20-inch shaft for compatible lower-transom boats. Its high-output propulsion supports offshore cruising and fishing, while proper shaft matching helps maintain effective propeller depth and thrust delivery.
Description
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Mercury 300HP 300L White 4-Stroke Outboard Specs
| Brand | Mercury Marine |
| Full Model Code / Part Number | 300L White 4-Stroke (20" Shaft) |
| Country of Origin | USA |
| Engine Type & Configuration | 4-Stroke Inline 6 (Supercharged with Verado SmartCraft) |
| Horsepower Output (HP / kW) | 300 HP (221 kW) |
| Displacement (cc / cu in) | 2600 cc (158 cu in) |
| Bore x Stroke (mm / in) | 82.0 x 82.0 mm (3.23 x 3.23 in) |
| Maximum RPM Range (Full Throttle Operating Range) | 5800 - 6400 RPM |
| Fuel Induction System | Sequential Multi-Port Electronic Fuel Injection (EFI) with Supercharger |
| Ignition System | SmartCraft ECM 0d Digital Inductive |
| Starting System | Electric Start with SmartStart Push Button |
| Steering System | Electro-Hydraulic Power Steering |
| Trim & Tilt System | Smart Craft Power Trim and Tilt |
| Gear Ratio & Shift Mechanism | 1.85:1 (Forward - Neutral - Reverse) |
| Exhaust System | Through Propeller |
| Recommended Transom Shaft Length | L: 20 inches |
| Alternator / Charging Output (Amps / Watts) | 70 Amp (Idle Charge Battery Management System) / 882 Watts |
| Recommended Fuel Grade & Oil Type | Regular Unleaded (Min. 87 Octane) / Mercury 4-Stroke Outboard Oil NMMA FC-W 25W-40 |
| Dry Weight (kg / lbs) | 268 kg / 600 lbs |
| Standard Warranty | 3 Years Limited Recreational Warranty |
Common Question of Mercury 300L White
Is the white 300L four-stroke?
Yes. The white Mercury 300L is identified as a 300-horsepower four-stroke outboard with a 20-inch shaft. Its electronic fuel injection system manages fuel delivery, while the white finish identifies exterior color. Confirm controls, steering, battery, wiring, fuel, transom strength, and package contents before installing this high performance outboard motor.
What shaft length does it use?
The shaft length is 20 inches, intended for a matching transom height. Confirm the boat’s actual measurement before installation because incorrect shaft length can affect cooling-water pickup, gearcase position, propeller immersion, steering response, and trim. Proper measurement supports this ready to bolt marine outboard package.
Does the white finish change performance?
No. The white finish changes exterior appearance rather than the listed horsepower or shaft length. Confirm the exact fuel system, controls, battery connections, steering equipment, engine weight, and package contents with the seller. Correct hull matching and professional rigging remain essential for dependable four-stroke operation.
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