You may have heard your car has a four-stroke engine, but you're not sure what that means. Why are there four? And what is a stroke, anyway? A modern gas engine most commonly uses pistons and a ...

The German automaker sees your four-stroke engine and raises you... two more strokes. Ready for some math? Porsche just ...

In the exhaust stroke, the exhaust valve is open and the combustion products are expelled from the cylinder. The sequence shown on the next page represents this behavior for a Mitsubishi direct ...

Along with a TIG welder and mechanical ingenuity bordering on genius-level, all of which come to bear on this fridge compressor to four-stroke engine build. The video posted by [Let’s Learn ...

The original four-stroke Otto engine, first devised in Germany during the 1860s, remains the blueprint for how gas-powered engines still operate even today; completing the following stages over ...

You can’t start a small four-stroke engine in reverse, so their simple chain drive transmissions lack the extra cogs to make it happen. Enter [HowToLou], who has given his go-kart a reversing ...

The 2025 Honda CRF450RL carries over the same engine, suspension, and frame dimensions from the 2024 model. The 449.7cc single cylinder four-stroke engine is liquid-cooled with a 12.0:1 ...

The world's first dual-fuelled, ammonia-powered vessel has docked in Southampton. The Singapore-flagged Fortescue Green Pioneer is the first of its kind and powered by a four-stroke engine, two of ...