General Specifications
HP / kW
250 HP / 186.3 kW
Displacement
3032 cc (185.0 cu in.)
Cylinders
6 (V6 60°)
WOT RPM
5500 - 6000
Weight
225 kg / 496 lbs
Drive & Lower Unit
Gear Ratio
1.75:1
Shaft Length
20", 25", 30"
Electrical System
Alternator Output 864 Watts
Starting System Electric
Technical Maintenance Toolkit
Verified service specifications for the Mercury 250hp V6 OptiMax (2010)
Lubrication
Engine Oil
Mercury OptiMax/DFI Oil
Gearcase Lube 798 ml
Ignition System
Spark Plug
NGK IZFR5G (Iridium)
Gap Setting 0.031"
Firing Order 1-2-3-4
Performance Specs
Idle RPM 700 ± 50
WOT Range 5500-6000
Alternator 864W
Standard Maintenance Intervals
20H Break-in Service
100H Annual Tune-up
300H Water Pump & Seals
Identification
The serial number for the Mercury 250hp V6 OptiMax is typically found on a plate located on the transom bracket.
Technical Toolkit
Maintenance Compatibility
These models share common service parts with the Mercury 250hp V6 OptiMax:
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 2010.