4.5L MPI 250 Bravo

Best Holiday wishes from the crew at BAM Marine!

We are closed until Monday Jan 5th, 2026

Orders placed now will be processed when we return

See more details about our holiday schedule here

As always online ordering is available 24/7!

We wish you and yours health and happiness this holiday season! Thank you.

 

 

 

MERCURY MERCRUISER 4.5L The Next Generation Featuring a host of engineering innovations, the 4.5L series establishes new standards for power-to-weight ratio, driver experience, acceleration, durability, and ease of maintenance.
Availability: In stock
Manufacturer part number: 40450071A to 40450080A
Normally Ships: In stock - Same business day
*
*
*
*
Shipping specs, pounds and inches
Ship to
*
*
Shipping Method
Name
Estimated Delivery
Price
No shipping options
$0.00

SPECIFICATIONS

HP / kW
  • 250 / 186
Maximum RPM (WOT)
  • 4800-5200
Engine type
  • V6, 2-valve/cylinder pushrod
Displacement (L)
  • 4.5
Displacement (CID/L)
  • 275 / 4.5
Bore and stroke
  • 4.0 x 3.6" / 102 x 92 mm
Recommended fuel
  • Unleaded Regular 87 Octane Minimum (R+M/2) or 90 RON 10% Ethanol Maximum
Fuel ethanol tolerance
  • Up to 10%
Fuel requirement
  • 90 RON 10% Ethanol Maximum
  • Unleaded Regular 87 Octane Minimum (R+M/2)
Engine control system
  • Mechanical Shifting with Optional SmartCraft DTS
  • Standard SmartCraft with Electronic Throttle Control
Fuel delivery system
  • Computer controlled Multi-Port Electronic Fuel Injection (MPI)
Air induction
  • Performance-Tuned Scroll Intake Manifold
Ignition
  • SmartCraft PCM 112 Digital Inductive
Alternator amp / Watt
  • 70 amp / 882 watt (Belt-Driven)
Water drain system
  • Air Actuated "Season Extender" (Bravo)
  • Easy Drain "Season Extender" (Alpha)
Exhaust system
  • Through prop
Cooling system
  • Water cooled with thermostat; FWC available as factory option (Alpha) and packaged with SeaCore Drive (Bravo)
Lubrication system
  • Integrated wet sump
Recommended oil
  • NMMA Certified FCW 25W-40 Synthetic Blend
Engine guardian system
  • SmartCraft Engine Guardian
Dimensions (L x W x H)
  • 28 x 30 x 22" / 696 x 740 x 559 mm
Weight (engine only)
  • 761 lbs / 345 kg
Compatible drives
  • Alpha
  • Bravo One
  • Bravo Three
  • Bravo Two

SPECIFICATIONS

HP / kW
  • 250 / 186
Maximum RPM (WOT)
  • 4800-5200
Engine type
  • V6, 2-valve/cylinder pushrod
Displacement (L)
  • 4.5
Displacement (CID/L)
  • 275 / 4.5
Bore and stroke
  • 4.0 x 3.6" / 102 x 92 mm
Recommended fuel
  • Unleaded Regular 87 Octane Minimum (R+M/2) or 90 RON 10% Ethanol Maximum
Fuel ethanol tolerance
  • Up to 10%
Fuel requirement
  • 90 RON 10% Ethanol Maximum
  • Unleaded Regular 87 Octane Minimum (R+M/2)
Engine control system
  • Mechanical Shifting with Optional SmartCraft DTS
  • Standard SmartCraft with Electronic Throttle Control
Fuel delivery system
  • Computer controlled Multi-Port Electronic Fuel Injection (MPI)
Air induction
  • Performance-Tuned Scroll Intake Manifold
Ignition
  • SmartCraft PCM 112 Digital Inductive
Alternator amp / Watt
  • 70 amp / 882 watt (Belt-Driven)
Water drain system
  • Air Actuated "Season Extender" (Bravo)
  • Easy Drain "Season Extender" (Alpha)
Exhaust system
  • Through prop
Cooling system
  • Water cooled with thermostat; FWC available as factory option (Alpha) and packaged with SeaCore Drive (Bravo)
Lubrication system
  • Integrated wet sump
Recommended oil
  • NMMA Certified FCW 25W-40 Synthetic Blend
Engine guardian system
  • SmartCraft Engine Guardian
Dimensions (L x W x H)
  • 28 x 30 x 22" / 696 x 740 x 559 mm
Weight (engine only)
  • 761 lbs / 345 kg
Compatible drives
  • Alpha
  • Bravo One
  • Bravo Three
  • Bravo Two
Products specifications
Propshaft Horsepower 250