General Specifications
HP / kW
300 HP / 223.5 kW
Displacement
2598 cc (158.5 cu in.)
Cylinders
6 (Inline 6 Supercharged)
WOT RPM
5800 - 6400
Weight
288 kg / 635 lbs
Drive & Lower Unit
Gear Ratio
1.85:1
Shaft Length
20", 25", 30"
Electrical System
Alternator Output 1008 Watts
Starting System Electric
Technical Maintenance Toolkit
Verified service specifications for the Mercury 300hp Verado (L6) (2008)
Lubrication
Engine Oil
Mercury 25W-40 Synthetic
Oil Capacity 7 Liters
Gearcase Lube 970 ml
Ignition System
Spark Plug
NGK ILFR6G-E
Gap Setting 0.031"
Firing Order 1-2-3-4
Performance Specs
Idle RPM 700 ± 50
WOT Range 5800-6400
Alternator 1008W
Standard Maintenance Intervals
20H Break-in Service
100H Annual Tune-up
300H Water Pump & Seals
Identification
The serial number for the Mercury 300hp Verado (L6) is typically found on a plate located on the transom bracket.
Technical Toolkit
Maintenance Compatibility
These models share common service parts with the Mercury 300hp Verado (L6):
Category Discovery
Reference Data
Information compiled from Mercury Marine factory service manuals and original sales literature published in 2008.