4-stroke outboard motors

Petrol (4-stroke)

— gasoline internal combustion engine with a four-stroke cycle. All gasoline engines (regardless of the cycle of operation) are heavier, more complex and more expensive than electric ones, with the last two features relating to both the purchase and use of the unit. In addition, during operation, they produce a lot of noise and emit exhaust gases. On the other hand, the power of such motors can be almost anything — from modest models for single boats to professional units suitable even for sea boats. Yes, and dealing with a supply of fuel is often easier than with charging a battery. Specifically, four-stroke engines are considered more advanced than two-stroke ones due to their economy, low noise level, fewer harmful emissions, ease of starting and ease of refueling (gasoline and oil are poured separately, no need to prepare the mixture). However, such units are not cheap, which limits the scope of their application to motors of the middle and top categories.