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
- Fuel delivery system Computer controlled Multi-Port Electronic Fuel Injection (MPI)
The specifications displayed here may not be indicative of the entire engine family; click on the “See All Models and Specs” link to view the specs in detail.
Named Top Product by Boating Industry
The Mercury Marine 4.5L 200hp sterndrive is a 2015 Boating Industry Top Product of the year.
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MerCruiser repair manuals Mercruiser inboard outboard manuals, Mercruiser sterndrive repair manuals, Mercruiser outdrive factory service manual, download instantly. I have a 1997 Mercury 120HP, 2-Stroke, Oil injected, inboard connected to a jet drive. How to remove alternator from mercury mercruiser 5.0l. MerCruiser Alternator Service & Repair 3.7 4.3 5.0. MerCruiser Water In Engine Crankcase Oil. DOWNLOAD MerCruiser Factory Service Manual 1978-20. DOWNLOAD MerCruiser Engine Repair & Sterndrive Man. Picture Window theme. Mercruiser Sterndrive 4.3L MPI 220 HP – MERCRUISER MULTIPORT INJECTED (MPI) STERNDRIVE ENGINES The MPI system fine-tunes the fuel-to-air mixture in the combustion chamber, delivering ultra-smooth operation from idle to wide-open throttle. Mercury’s engineers achieved outstanding Noise / Vibration / Harshness (NVH) levels in the 4.3L. Power steering is standard, providing you complete.
The winning products were selected based on many factors, including innovation, impact on the industry, and how they advanced their category or created a new category.
In 2014, the Mercury MerCruiser 4.5L sterndrive engine was named an Innovation Award Winner at the International Boatbuilders Exhibition & Conference (IBEX).
Built for Marine
1994 4.3 Mercruiser Engine Manual
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 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.
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.
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PrintCompare With Other ProductsHP / 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
PrintCompare With Other ProductsHP / kW - 200 / 149
Maximum RPM (WOT) - 4400-4800
Engine type - V6, 2-valve/cylinder pushrod
Displacement (L) - 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 - Easy Drain 'Season Extender'
Exhaust system - Through prop
Cooling system - Water cooled with thermostat; FWC available as factory option
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
You can order all available Mercury literature online or through any authorized Mercury dealer. Please have your outboard or sterndrive serial number before placing the order.
Mercruiser 4.3 Manual
- Operation, Maintenance, and Warranty Manuals
- Parts Manual
- Service Manual
Mercruiser
