How to Tell If My Lawnmower Is a 2 Cycle?

Be sure you know which type of lawnmover you are working with.
Be sure you know which type of lawnmover you are working with. (Image: Comstock Images/Comstock/Getty Images)

It's crucial that you know whether your lawn mower has a 2-cycle or a 4-cycle engine. For example, each type of engine requires different fueling techniques. If you try to fuel a 2-cycle engine as you would a 4-cycle engine, it will freeze up. The engine will then likely need to be replaced. Likewise with a 4-cycle engine. Fuel it up improperly and and can foul-up, or even damage, the carburetor.

Video of the Day

Determine how to add fuel to your lawnmower. Both types of mowers will have gas tanks, of course, but look for a crankcase with a filler tube to add oil. The top will screw off to reveal a dipstick. If there is a place to add oil separately, it's a 4-cycle engine. If you mix oil along with the gasoline when you fuel up, then that tells you it's a 2-cycle lawnmower.

Refer to the maintenance section of the owner's manual. If it instructs you to change the oil on a regular basis, as well as before you store it for the winter, then you have a 4-cycle lawnmower.

Try to start the lawnmower during the cold weather. Two-cycle engines start much easier. However, they give off more smoke. Also pay attention to the noise the lawnmower makes when it's running. A machine with a 2-cycle engine is much noisier than a machine with a 4-cycle engine.

Run the lawnmower up a steep incline. A 2-cycle engine won't lose its power like a 4-cycle engine will. It will have approximately twice as much power.

Tips & Warnings

  • Because 2-cycle engines are smaller and lighter, they are best for small machines like leaf blowers and chainsaws. Keep that in mind when you're making the comparisons.


Promoted By Zergnet
Is DIY in your DNA? Become part of our maker community.