4.5L 250
The MerCruiser 4.5L 250 is the 250 hp H.O. rating of Mercury's in-house 4.5-litre petrol V6, the volume mid-range sterndrive that replaced the 4.3L V6.
The 4.5L 250 is the original and higher rating of the 4.5-litre marine V6 Mercury designed from a clean sheet at Fond du Lac and put on sale in 2014. It is the same 275 cu in 2-valve pushrod V6 as the 200, calibrated to 250 hp (186 kW) with a 4800–5200 rpm WOT band. It is what retired the last GM-based 4.3L V6 from the sterndrive catalog. The 200 and 250 must not be averaged.
Unlike the Alpha-only 200, the 250 is catalogued with Alpha One and Bravo One, Two and Three, and it is the bottom of the Bravo Four S pairing band (250–430 hp). Bravo Four S is a forward-facing sterndrive, not a pod. There is no 4.5L Horizon or TowSport inboard on the current US catalog.
Specifications
Power
- Power
- 250 hp
- Power (kW)
- 186 kW
- Rated speed
- 5200 rpm
Engine
- Configuration
- V6
- Cylinders
- 6
- Displacement
- 4.5 L
- Fuel
- Petrol
- Mounting
- Inboard
- Drive type
- Sterndrive
Reviews
No independent reviews on file yet.
Sources
- 1. 4.5L V6 Sterndrive 200-250hp — Mercury Marine
- 2. Mercury MerCruiser Sterndrives & Inboards brochure 8M0189531 (April 2022) — Mercury Marine
- 3. New MerCruiser Bravo Four S forward-facing drive (24 August 2020) — Brunswick / Mercury Marine
Specifications compiled from manufacturer sources.