2 stroke VS 4 stroke engine

Let us discuss the differences between 2 vs 4 stroke base on understanding.

2 Stroke engines
– Power, Slow speed. Used for vessel’s main engine.
– Every 2 stroke of piston movement there is 1 power stroke. ( UP(compression stroke), DOWN(exhaust+ power stroke) )
– 1 exhaust valve
– suction from scavenging ports instead of suction valve.

4 Stroke engines
– Less power, Fast speed. Used for vessel’s generator to for electrical generation.
– Every 4 stroke, there is 1 power stroke. ( UP(exhaust stroke),DOWN(suction stroke), UP(compression stroke), DOWN(power stroke) )
– Consist of 2 suction and 2 exhaust valve.

do add on to the list !