Mercury Mercruiser 4.5L 250 HP Inboard Engines 2021
4.5L 250 MERCRUISER BOBTAIL (engine only)
Represent the industry’s best when it comes to delivering reliable, long-lasting and easy-to-own power. From our Horizon petrol inboards to our Mercury Diesel products. MerCruiser inboards are built using the highest-quality materials such as stainless steel, the most reliable systems such as closed-cooling for added corosion protection and the best warranty coverage on the water. All to make your ownership experience enjoyable, simple and worry-free.
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.
|HP / kW||· 250 / 184|
|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
Built for Marine.
Designing a V-6 block solely for marine use allows Mercury to build the 4.5L with the ultimate protection system, using cast-iron componentry where the engine intersects with seawater, and using corrosion-resistant aluminium and composites everywhere else.
Thanks to its new, long-runner scroll intake manifold which draws in more air and converts it into additional torque, the 4.5L delivers a ground-breaking power-to-weight ratio and gives you V-8 power in a V-6 package.
Smooth & Quiet.
The 4.5L’s newly designed rear-facing throttle body, anti-whistle throttle plate, engine cover and mounts, lightweight flywheel, fuel-supply module, and structural oil pan all work together to deliver a superior idle, smoothness and low vibration. Resulting in an exceptional driving experience.
The MercFusion Paint System creates an outer seal against the elements, while MerCathode® provides automatic protection against galvanic corrosion. For maximum defense against saltwater effects, the SeaCore® industrial hardcoat anodising system and closed-cooling circuit is available.
The 4.5L comes standard with Adaptive Speed Control, which automatically maintains engine rpm regardless of load or water conditions. The result is increased throttle response and a sporty feel.
* ENGINE AND STERN DRIVE PACKAGE (ALPHA) RRP: $32,100 NZD – Additional cost for Bravo Drive
Lakeland Marine Services is NZ’s only Bayliner specialist dealer. Delivery throughout NZ Taupo’s only Mercruiser & Mercury outboard, Honda, Volvo Penta, Yanmar and Parsun service & sales dealer with 40 years Mercury service experience.