New Mercury 250 HP ECT 4.5L Inboard Engine

Designing a Mercury 250 HP Inboard Engine 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 aluminum and composites everywhere else.

Repower Financing.
With Mercury Repower Financing, you can easily power up everything from fishing boats, to runabouts, to cruisers with flexible financing on the engine. You can also choose to finance rigging, gauges, controls and even labor. Mercury Repower Financing offers low rates and low monthly payments to fit a boater’s budget.

Owners Manuals
Need an Owner’s Manual for your Mercury engine to perform maintenance, replace parts or just learn more about your engine? Mercury has made it easy for you to purchase a printed copy or to download and print your own copy. To order a printed version of the Service Manual for your particular Mercury Outboard or MerCruiser Engine.

Powerful Performer.
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.

Corrosion Protection.
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 anodizing system and closed-cooling circuit is available.

Sporty Handling.
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.

Easy to Maintain.
When service is required, maintenance is a snap with the front-mounted drive lube monitor, color-coded maintenance points – including easy-to-reach oil filter and fill – and “how-to” videos that can be accessed via the QR code on the label.

SPECS:

HP / kW
250 / 184

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

• Availability:10 In Stock
• Model:Mercury 250 HP ECT
• Brand: