General Specifications
HP / kW
300 HP / 223.5 kW
Displacement
4600 cc (280.7 cu in.)
Cylinders
8 (V8 64°)
WOT RPM
5400 - 6000
Weight
272 kg / 600 lbs
Drive & Lower Unit
Gear Ratio
1.85:1
Shaft Length
20, 25, 30
Electrical System
Alternator Output 1449 Watts
Starting System Electric
Technical Maintenance Toolkit
Verified service specifications for the Mercury 300 Verado V8 (2024)
Lubrication
Engine Oil
25W-40 FC-W
Oil Capacity 7 Liters
Gearcase Lube 980 ml
Ignition System
Spark Plug
NGK LMAR6C-9
Firing Order 1-2-3-4
Performance Specs
Idle RPM 700 ± 50
WOT Range 5400-6000
Alternator 1449W
Standard Maintenance Intervals
20H Break-in Service
100H Annual Tune-up
300H Water Pump & Seals
Identification
The serial number for the Mercury 300 Verado V8 is typically found on a plate located on the transom bracket.
Technical Toolkit
Maintenance Compatibility
These models share common service parts with the Mercury 300 Verado V8:
Category Discovery
Reference Data
Information compiled from Mercury Marine factory service manuals and original sales literature published in 2024.