It is a recurring question for those who have a boat without a motor, inboard. What should an outboard 2-stroke or 4-stroke?
It is not an easy question to answer in general terms. The main difference between both types of engine is the internal process to generate energy. Not to get too technical, it could be summarized that a two-stroke engine performs the processes of intake and compression phase (first time) and the combustion and exhaust in a second phase (second time). In contrast, the 4-stroke engine carries out each of these processes independently.
But How does this translate into the advantages and disadvantages of each one of them? In the first place, and, as the data highlighted, it is worth mentioning that the engines 2 times get a higher power that 4 times with the same displacement.
In addition, its construction is simpler, which means a lower weight and, usually, a lower price. But here is the end of their advantages.
The expense of fuel is much higher in the 2-stroke engines. Not only their energy efficiency is low but that the emission of polluting gases is much greater. This, coupled with a high level of vibration and noise, and makes the browsing experience with 2-stroke engines not sole be soft.
In addition, in the 4 stroke engines are more extensive the intervals between the internal explosions, which means a less wear of the components, and increased reliability.
In summary, if you are looking for power without any other consideration, the 2-stroke engine is a good choice. Small semi-rigid or small boats, the lower weight of an engine 2tiempos you can also tilt the balance in his favor. However, for the vast majority of cases, the 4-stroke engine is the alternative recommended.
