Two-stroke engines have their uses, but they are seen as environmentally unfriendly today. But why do they have that reputation, and is it deserved?

There are two basic differences between 2 stroke and 4 stroke motors. One has to do with how many strokes it takes a piston to complete an engine cycle (more on that below). The other has to do with ...

Have you ever wondered why you need to add oil to your chainsaw’s fuel supply? Or why some dirt bikes have a higher pitched exhaust note than others? We’ve all been burdened with yard work or been ...

Anyone who appreciates simplicity of design and efficiency of operation has to like small two-stroke-cycle engines that power construction tools such as cut-off saws, rammers and breakers. Producing ...

If you’re shopping for a new fishing boat or an outboard motor to power it, one of the decisions you’ll have to make is between a 2 stroke vs 4 stroke engine. Unless you’re going electric, this choice ...

Q: I recently was gifted a 1979 Negrini moped. It has a 49cc, two-cycle engine. After some extensive cleaning, it appears to be in good condition. The owner’s manual calls for the gas-oil mix to use ...