The Mercruiser 4.5L V6 High Torque engine was developed exclusivley for Marine use, it is not a modified Automotive engine, designed by Mercury Marine from the ground up it has the largest displacement in its class. Higher displacement = less fuel & better bottom end power. 

The Best engines deserve the best installation, application engineering, drive, prop and gear ration selection, for the right advice and the best deals on the full range of Mercury Mercruiser engines contact the multi award winning team at Hitech Marine, Australia`s No:1 Mercruiser Repower Dealer.
Get the confidence, fuel economy and power to Go further and more often when you... "Do it Once - Do it Right" with Hitech Marine 


For the Right Advice & the best Mercruiser Engine deals, see the certified team at...

Hitech Marine Mercruiser Engine Experts

Dedicated to Quality – First time Every time


Check out some of the boats Hitech Marine have Repowered with the Mercruiser 4.5L V6 Engine...

 

Mercrusier Repower by Hitech Marine to Penguin 23


Penguin 23 Fishing boat Repowered by Hitech Marine with a Mercruiser 4.5L 250HP V6 with Bravo 3 Drive 

 

Mercrusier Repower by Hitech Marine to Bertram 20


Bertram 20 Repowered by Hitech Marine with a Mercruiser 4.5L 250HP V6 with Alpha 1 Drive

The Right Price - The Right Advice
Australias most Awarded Mercrusier Dealer

Mercruiser Sales Excellence award Hitech Marine 2006Mercruiser Sales Excellence award Hitech Marine 2007Mercruiser Dealer of the Year Hitech Marine 2008Mercruiser Dealer of the Year Hitech Marine 2009Mercruiser Dealer of the Year Hitech Marine 2008Mercruiser Dealer of the Year Hitech Marine 2011Mercruiser Dealer of the Year Hitech Marine 2012Mercruiser Dealer of the Year Hitech Marine 2013Mercruiser Dealer of the Year Hitech Marine 2019


Specifications

HP / kW
  • 250 / 186
Maximum RPM (WOT)
  • 4800-5200
Engine type
  • V6, 2-valve/cylinder pushrod
Displacement (L)
  • 4.5
Bore and stroke
  • 4.0 x 3.6" / 102 x 92 mm
Fuel requirement
  • 90 RON 10% Ethanol Maximum
  • Unleaded Regular 87 Octane Minimum (R+M/2)
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
Dimensions (L x W x H)
  • 28 x 30 x 22" / 696 x 740 x 559 mm
Weight (engine only)
  • 756 lbs / 343 kg
Compatible drives
  • Alpha
  • Bravo One
  • Bravo Three
  • Bravo Two


For the Right Advice & the best Mercruiser Engine deals, Do it Once - Do it Right with the certified team at...

Hitech Marine Mercruiser Engine Experts

Dedicated to Quality – First time Every time

Engine Hours
  • 0
Horse Power (hp)
  • 250
Fuel Type
  • Petrol
Download Mercruiser V6 4.5L Brochure
Download Install drawing V6-V8 inner transom
Download Install Drawings Mercruiser V6 4.5L Alpha
Download Install Drawings Mercruiser V6 4.5L Bravo
Download Install Drawings Mercruiser V6 4.5L Alpha Bravo Fresh Water Cooling Drawing