Mercury 170 Tier 3 172.4 HP 2.0L Inboard Diesel Engine

Overview

The Mercury 170 Tier 3 inboard diesel engine delivers robust performance, advanced fuel efficiency, and long-term reliability for modern marine applications. It combines compact design with powerful output, making it ideal for both recreational and light commercial vessels.

Moreover, its advanced direct-injection system ensures clean combustion and reduced emissions. As a result, owners benefit from smoother cruising and lower operating costs.

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Why Choose the Mercury 170 Tier 3 Diesel Engine?

This marine diesel engine is designed for boat owners who need dependable power, efficient operation, and long service life. In addition, it combines modern technology with proven Mercury engineering.

Consequently, users benefit from strong performance, reduced running costs, and simplified maintenance.

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High-Power 172 HP Performance

This engine produces strong low-end torque and consistent power delivery. Therefore, boats accelerate faster and maintain excellent control in changing sea conditions.

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2.0L Diesel Fuel Efficiency

Thanks to advanced fuel injection and optimized combustion, the 2.0L power unit delivers impressive fuel economy. Consequently, long-distance cruising becomes more affordable and efficient.

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Reliable Sterndrive Integration

Because of SmartCraft compatibility and reinforced construction, this engine integrates smoothly with sterndrive systems. In addition, digital diagnostics simplify monitoring and maintenance.

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Clean, Quiet, and Efficient Operation

Direct-injection technology atomizes fuel at high pressure for complete combustion. As a result, emissions, vibration, and engine noise are significantly reduced.

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Lightweight and Durable Construction

The Vermicular Graphite Casting (VGC) engine block provides exceptional strength while remaining lightweight. Therefore, cooling efficiency improves and overall durability increases.

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SmartCraft Digital Technology

Mercury SmartCraft integration delivers real-time engine data on a clear digital display. Furthermore, Digital Throttle & Shift ensures smooth shifting and responsive handling.

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Advanced Corrosion Protection

A closed water-cooling system and optional SeaCore® protection reduce corrosion risks. Consequently, long-term reliability improves in saltwater environments.

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Easy Maintenance and Long-Term Reliability

All major components are designed for easy access and servicing. Therefore, routine inspections and fluid changes remain fast and efficient.

Moreover, Mercury’s strict manufacturing standards ensure dependable long-term performance.

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Trust Signals and Brand Confidence

Mercury Marine is a globally recognized OEM brand with decades of marine engineering expertise. In addition, this diesel engine meets Tier 3 emissions standards and international certification requirements.

Furthermore, OEM warranty coverage, verified inspections, and positive customer reviews reinforce buyer confidence and long-term value.

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Key Benefits of the Mercury 170 Tier 3 Engine

• 172.4 HP high-performance output
• 2.0L fuel-efficient diesel system
• Tier 3 emissions compliance
• SmartCraft digital compatibility
• Lightweight VGC engine block
• Quiet and low-vibration operation
• Advanced corrosion protection
• Joystick piloting support
• Easy maintenance access
• Reliable sterndrive integration

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Mercury 170 Tier 3 vs Other Marine Diesel Engines

Mercury 170 vs Volvo Penta D3

While the Volvo Penta D3 offers solid performance, this Mercury diesel engine provides improved digital integration and easier servicing. Therefore, maintenance and monitoring remain more convenient.

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Mercury 170 vs Yanmar 4LV150

Compared to the Yanmar 4LV150, this model delivers better SmartCraft compatibility and joystick support. As a result, vessel control and diagnostics are enhanced.

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Explore Related Inboard Engines

• Explore more options in our inboard engine category.
• View Mercury inboard engines.
• Browse Yanmar diesel engines.

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Technical Specifications – Mercury 170 Tier 3 Diesel

Engine Performance

Specification	Value
Rated Power	172.4 HP / 112 kW
Engine Type	Inline Diesel
Displacement	2.0 L
Maximum RPM	4000
Bore x Stroke	3.27 x 3.62 in (83 x 92 mm)
Fuel Consumption	8.5 gal/hr @ 4000 RPM
Emissions	BSO 2 / RCD 2 / IMO 2 / EPA Tier 3

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Dimensions and Weight

Specification	Value
Length	32 in (802 mm)
Width	30 in (710 mm)
Height	30 in (757 mm)
Engine Weight	582 lbs (264 kg)
With Transmission	637 lbs (289 kg)
Alpha Drive	763 lbs (346 kg)
Bravo One	802 lbs (364 kg)
Bravo Two	814 lbs (369 kg)
Bravo Three	822 lbs (373 kg)

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Compatibility

Specification	Value
Compatible Drives	Alpha
SmartCraft Support	Yes

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Frequently Asked Questions – Mercury 170 Tier 3

What boats are compatible?

This engine suits cruisers, fishing boats, and sport vessels designed for sterndrive installations between 22 and 34 feet.

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How long does the Mercury 170 Tier 3 Diesel Engine last?

With proper servicing and genuine parts, it can operate reliably for several thousand hours. However, lifespan depends on operating conditions and maintenance practices.

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Does the Mercury 170 Tier 3 Diesel Engine it require regular maintenance?

Yes. Oil changes, cooling checks, and fuel inspections are essential. Nevertheless, the accessible layout simplifies servicing.

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Is joystick piloting supported?

Yes. This model supports Mercury joystick piloting systems for compatible sterndrives.

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Order the Mercury 170 Tier 3 Diesel Engine Today

Upgrade your vessel with efficient diesel power and advanced marine technology.

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