4.5L V6 Sterndrive 200 - 250hp

The multi-point electronic fuel injection system fine-tunes the air-to-fuel ratio for the ideal combination of power and efficiency.

A powerful alternator delivers 70 amps of charging power at wide-open throttle – perfect for keeping onboard electronics running long into the fun.

The Adaptive Speed Control feature lets you maintain engine rpm despite changes in load or conditions. Climbing large swells is easier. Cruising at low speeds is smoother. Carving out tight turns is effortless.

Explore farther with confidence knowing that the Engine Guardian system is at work. It monitors the engine and, if necessary, can adjust engine functions to help get you home safely.

Take on the toughest marine conditions with the available SeaCore® system. It’s an entire package of durable, corrosion-fighting technology that offers an extraordinary level of protection, including hard-coat anodizing on the drive, stainless-steel fasteners and components, and a closed cooling system.

From the mounts to the throttle system, we’ve fine-tuned the 4.5L engine to minimize noise and vibration – all for an exceptional driving experience.

Electronic fuel injection optimizes efficiency so you can get maximum fun from every fill-up. Plus, MerCruiser engines deliver full performance on 87-octane fuel for additional savings at the pump.

Don’t waste a second on the water. With V6 muscle and performance, the 4.5L engine will get you where you want to go fast – and you’ll have a whole lot of fun on the way.

Noise Reduction

Hear your friends and family talk. Hear yourself think. Enjoy your time on the water. A MerCruiser engine is still as powerful as ever. Thanks to sound-dampening advancements, it’s just not so loud about it.

Performance

High-displacement engines and multi-port fuel-injection systems maximize performance from every drop of fuel. You’ll enjoy quick acceleration, instantly responsive power and total fun.

Effortless Ownership

A redesigned service access has simplified what was once a hassle, bringing all service points to a single easily reachable location, color-coded for owner-friendly maintenance.

Durability

Through grueling endurance test cycles – in the lab and on the water – Mercury has refined every MerCruiser engine into an unflinching workhorse, built with better alloys and superior paints that can stand up to the harshest conditions.

name

MerCruiser 4.5L 200hp

MerCruiser 4.5L 250hp

Alternator amp / Watt

70 amp / 882 watt (Belt-Driven)

70 amp / 882 watt (Belt-Driven)

Displacement (L)

4.5

4.5

Engine type

V6, 2-valve/cylinder pushrod

V6, 2-valve/cylinder pushrod

HP / kW

200 Hp / 149 kW

250 Hp / 184 kW

Maximum RPM (WOT)

4400-4800

4800-5200

Oil maintenance interval

-

-

Oil sump volume

4.5 qts

4.5 qts

Peak Torque

-

-

Recommended fuel

Unleaded Regular 87 Octane Minimum (R+M/2) or 90 RON 10% Ethanol Maximum

Unleaded Regular 87 Octane Minimum (R+M/2) or 90 RON 10% Ethanol Maximum

Recommended oil

NMMA Certified FCW 25W-40 Synthetic Blend

NMMA Certified FCW 25W-40 Synthetic Blend

Weight (engine only)

-

-

Weight (incl. transmission)

-

-

Whether your ideal day means towing family and friends, aimlessly joyriding or dropping the hammer, MerCruiser offers the drive to fit your needs. It’s the perfect complement to premium engine performance.