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Mercurysport

MerCruiser 4.5L 250HP

New Generation

The 4.5L series, which features many innovative engineering products, sets new standards in power-to-weight ratio, driving experience, acceleration, durability, and ease of maintenance.

Engine Details

HP / kW
  • 250 / 184
Maximum RPM (WOT)
  • 4800 – 5200
Engine Type    
  • V6, 2-valve/cylinder push rod
Away (L)    
  • 4.5
Cylinder Diameter and Stroke    
  • 4.0 x 3.6″ / 102 x 92 mm
Fuel Requirements    
  • Maximum 10% Ethanol 90 RON
  • Minimum 87 Octane Unleaded Regular (R+M/2)
Fuel Replenishment System    
  • Computer-controlled Multi-Port Electronic Fuel Injection (MPI)
Air Induction    
  • Performance-Adjustable Scroll Suction Manifold
Ignition    
  • SmartCraft PCM 112 Digital Inductor
Alternator amp / Watt    
  • 70 amps / 882 watts (belt driven)
Water Drainage System    
  • Air-powered “Season Extender” (Bravo)
  • Easy Drain “Season Extender” (Alpha)
Exhaust System    
  • Propeller
Cooling System    
  • Water-cooled (thermostatically controlled); available as manufacturer option with FWC (Alpha) and packaged with SeaCore Drive (Bravo)
Lubrication System    
  • Integrated age-based lubrication
Recommended oil    
  • NMMA Certified FCW 25W-40 Synthetic Blend
Dimensions (L x W x H)    
  • 696 x 740 x 559 mm
Weight (motor only)    
  • 343 kg
Compatible Drive Systems    
  • Alpha
  • Bravo One
  • Bravo Three
  • Bravo Two