I want to buy a 2 stroke engine to build a minibike. I am 15 years old and i never owned a 2 stroke engine before. I know they wear faster and consume more fuel than a 4 stroke engine. But how fast they wear and how much fuel the consume compared to a 4 stroke engine? I want to buy a 2 stroke engine cuz they are small, more powerful, and cheaper. The fumes annoy me a bit tho. Also, how much oil i have to add in the fuel for each 2 litre tank?What type of 2 stroke engine oil i should add for the first runs?

Im a noob at these stuff and i need help :)

  • Welcome to Motor Vehicle Maintenance & Repair! – Pᴀᴜʟsᴛᴇʀ2 Sep 14 '19 at 20:41
  • @Paulster2 heyyy – Randomouss Stuffed Sep 14 '19 at 20:42
  • The oil:fuel mix is defined by the manufacturer for each engine. Husquvarna specify 50:1 but only if using their oil... – Solar Mike Sep 14 '19 at 20:44
  • I know that but i've read in some sites that you should use a different mixture for the first run – Randomouss Stuffed Sep 14 '19 at 20:46
  • Refer to Husquvarna owners manual, not random internet denizens... – Solar Mike Sep 14 '19 at 21:23

You asked several questions.

  • For a given cubic capacity a 2-stroke engine generates more power and consumes more fuel than a 4-stroke because it fires twice as often.

  • They wear more quickly for the same reason: more stress on the moving parts.

  • Type of oil: refer to owner's manual.

  • The fuel mixture ratio means in the range 16/1 to 20/1.

  • How much oil in a 2-litre fuel tank? If you fill the tank from empty then 2 litres divided by 16 to 20 is between 100 and 125 ml oil.

Newbie to 2-strokes? The big catch is that they seize up easily and you can find yourself thrown upside down in a ditch. Why? Well, if you are going fast and shut off the power (the fuel supply) you also shut off the oil supply. So a fast revving engine is denied the lubrication it needs. When racing 2-strokes, they sometimes have no air filter so that the driver can put a gloved hand over the air intake and choke the air supply, forcing the carb to supply some fuel and thus some oil.

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