Volvo Penta - D9-575 (575-hp)

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Captain's Report

Volvo Penta D9 575

The D9’s footprint is about the same as Volvo Penta's existing 7.0 liter (TAMD75). Yet the 9.4 liter D9 builds in 100 more hp.

Modern Rules

These days, diesel engines are so smooth running and clean burning that they can be confused for gas engines to someone walking past one running at the dock. Some of us old school mariners still cling to the days when a diesel knocked like a rod was trying to penetrate the crankcase and if it didn’t smoke, then you knew something was wrong. And that diesel exhaust smell…. well it smelled like victory. But those days are long gone and the D9 is a shining example of how Volvo Penta has engineered more power in less space and made it environmentally sound as well.


In today’s engines, and indeed the D9, efficient power comes from carefully monitoring and controlling the fuel injection and burning process. In the D9, that’s done with EMS-2. EMS stands for Engine Management System and it began life as the need to meet exhaust emission standards began to take effect back in ’06. It’s basically a system of microprocessors and proprietary coding that calculates how much fuel the engine needs, and does it up to 100 times per second.

In addition, EMS-2 significantly reduces fuel consumption and minimizes exhaust emissions. So not only is that pesky lag time between hitting the throttle and the engine delivering power reduced to zero, range is extended and operating costs are lower.


That’s all well and good but you can’t touch and feel all that the EMS can do, so it doesn’t give you a warm fuzzy feeling like it does the Volvo Penta engineers. However, EVC does! This is the greatest technological leap forward since they started slicing bread, and it’s a feature that is directly felt and experienced by the operator.

This time the acronym stands for Electronic Vessel Control and it’s the latest development in engine control and instrumentation, and you can take it from someone who has tested EVC personally. Once you’ve experienced it, you never want to go back.

Because this isn’t a full blown EVC article, the short version is that EVC allows for plug and play installation between the motor and both the engine controls and helm gauges that allows you to not only control the flow of data to the helm but electronically control the engines, and therefore the output and synchronization with effortless authority.

Power Sources

Volvo Penta knows that cool air is denser than hot air since the molecules are closer together. For that reason, they installed an intake air cooler so the engine takes in more air molecules with every breath. This builds more horsepower and reduces emissions, especially when monitored by the EMS-2. These also work hand in hand with the twin entry turbo and electronically controlled fuel injectors.

Strength Built in

The D9 has a cast iron cylinder block and one-piece cylinder head and a special ladder frame bolted onto the bottom of the engine block. The crankshaft is drop forged and mated to induction hardened bearing surfaces with seven main bearings. The in-line 6-cylinder configuration allows room for the big crankshaft and the large bearing surfaces help to produce low vibration. Further reducing vibrations are the large flexible engine mounts that also transfer the weight over a larger area.

Ease of Installation and Service

Because Volvo Penta built the D9 with no service points at the front of the engine, you can virtually mount the unit right up to a forward bulkhead. Her short length also means that you can easily slip her into engine spaces typically reserved for a V-8. A quick look at the overall engine shows that service points are all still easily accessible and as most components are geared, there are fewer belts to worry about replacing. The D9 is also fully symmetrical, which further simplifies installation.

Volvo Penta D9 575

It’s also important to note that the D9 is built using highly automated assembly methods which translate into greater reliability and consistency, and that means lower unit costs. In addition, with 5,000 dealers in 130 countries, you won’t have to look far should you ever need service after the sale.