There are a few things to keep in mind when shopping for an engine. First, you’ll need to decide what type of engine you need. Gasoline engines are the most common, but diesel engines are also available. Next, you’ll need to decide on the size of the engine. Larger engines typically have more power, but they also tend to be more expensive. Finally, you’ll need to decide what features you need & you become engine buyer. Some engines come with features like turbochargers or superchargers, which can improve performance.