General Specifications
HP / kW
250 HP / 186.3 kW
Displacement
4600 cc (280.7 cu in.)
Cylinders
8 (V8 64°)
WOT RPM
5600 - 6200
Weight
229 kg / 505 lbs
Drive & Lower Unit
Gear Ratio
1.75:1
Shaft Length
20, 25
Electrical System
Alternator Output 1071 Watts
Starting System Electric
Technical Maintenance Toolkit
Verified service specifications for the Mercury 250 Pro XS V8 (2024)
Lubrication
Engine Oil
25W-40 FC-W
Oil Capacity 6.6 Liters
Gearcase Lube 980 ml
Ignition System
Spark Plug
NGK LMAR6C-9
Gap Setting 0.035"
Firing Order 1-2-3-4
Performance Specs
Idle RPM 700 ± 50
WOT Range 5600-6200
Alternator 1071W
Standard Maintenance Intervals
20H Break-in Service
100H Annual Tune-up
300H Water Pump & Seals
Identification
The serial number for the Mercury 250 Pro XS 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 250 Pro XS V8:
Model Evolution
History of the Mercury 250HP series over the years:
Category Discovery
Reference Data
Information compiled from Mercury Marine factory service manuals and original sales literature published in 2024.