New Max5 ST propeller by Mercury Racing
New Max5 ST propeller by Mercury Racing
The MV shipyard presents new projects
The MV shipyard presents new projects
By Carlo diMeglio

It is not a dream, it is reality.
A Suzuki engine that does not emit smoke has the same performance but with a significantly lower fuel cost and lower emissions.

Thanks to HEBoat (Hybrid Ecological Boat) technology created by Newtak engineering in collaboration with Coastal boat, it is possible to convert a classic Suzuki outboard engine into a hybrid natural gas engine. The system does not alter the basic characteristics of the engine and does not interfere with the original diagnostic and control tools.

The technology offers 3 modes of use:

  • 100% natural gas: it does not generate smoke or odors from exhaust gases, it keeps the lubricating oil clean, it prolongs the life of the engines with reduced maintenance costs. Fuel (LPG) has a far lower cost than gasoline
  • Combined Gas + petrol: manages to combine the two fuels to provide acceleration comparable to the petrol engine. In this way fuel costs are easier to manage without sacrificing performance
  • 100% petrol: classic use of the engine, since the basic structure is unchanged. You can use petrol as a fuel reserve or in areas where natural gas is not accessible.

In this table you can compare the performance with a Suzuki DF300 engine

Power supplied Method of use
270 Hp 100% gas
285 Hp Mix petrol + gas
300 Hp 100% petrol

As you can see there is only 10% of power loss, compared to the economic savings and the considerable reduction of polluting emissions.

It is possible to personalize the gas reserve on board using cylinders inside the boat, and the mode of use can be changed with a switch even during navigation.

In this table it is possible to compare the liters of gas with those of petrol:

SMALL 50 17
MEDIUM 100 34
LARGE 150 51

So in theory we have:

  • Save over 50% fuel
  • unchanged performance
  • cleaner emissions of 90% of diesel and 70% of petrol
  • no odor or exhaust smoke
  • compatibility with the new pollution regulations

The same technology will also be applicable to inboard and outboard engines, diesel or petrol engines of most of the world manufacturers. it will be enough to adapt a retrofit kit with sequential injection

Some doubts arise:

  • Is it safe? Personally using a boat with explosive cylinders on board would not make me feel relaxed. It is true that the LPG technology is very safe on cars, but there are no jumps and impacts with the waves as happens at sea; in addition to the high temperatures that reach the surfaces on board.
  • How much influence the navigation? The weight of the cylinders will shift the balances of the boat, so we do not know how much it will be able to modify the navigation structure.
  • How to get LPG in the sea? To date there are no filling stations that also supply LPG for fuel. For this reason, the HEB project is part of a reconstruction and redesign plan for current petrol pumps. Through traditional systems, LPG is produced, which is stored in cylinders that will serve as a tank for the filling stations. In this way we can make fuel at a filling station like we do with diesel or gasoline.
  • Is the reduced power really only 10%? how will the glide change?

We will try as soon as the coastal boat is available with this type of motorization and we will compare the data and the performances with the 3 modes of use.

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