1

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 at 20:41
  • @Paulster2 heyyy – Randomouss Stuffed Sep 14 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 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 at 20:46
  • Refer to Husquvarna owners manual, not random internet denizens... – Solar Mike Sep 14 at 21:23
1

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.

Not the answer you're looking for? Browse other questions tagged or ask your own question.