These can say things like: “This Side Up”, “This Side Down”, or “This Side Toward The Grass”, depending on the brand. Most manufacturers will stamp at least one side of the blade with a direction label. The most common and easiest way to tell which side of your lawn mower blade is up, is to look for the label. Usually it isn’t too difficult, but I’m going to cover several options since it’s not always the same for different lawn mower blades. There are a few handy tricks to figure out which side of your lawn mower blade is up.

Put all those reasons together and it’s incredibly important to install your lawn mower’s blade right side up! How To Tell Which Side Of Your Lawn Mower Blade Is Up? It can also impact the wear and tear on the blade, and even on your lawn mower itself. Those are the two most important reasons you should know which side of your lawn mower’s blade is up. It’s a recipe for a very uneven and patchy job mowing. Combined with the dull side of the blade cutting the grass, that uneven flow of wind won’t pull the grass correctly. If you have the lawn mower’s blade on upside down it won’t move air the same way. The wind from the moving blades pulls your lawn’s grass upright, helping give it an even trim and uniform length while you’re mowing. Airflow is an important part of how your lawn mower functions. Having the right side of your lawn mower’s blade up is also important for the airflow under your lawn mower. Read More: > The Best Lawn Mower Blades For Thick Grass It’ll just rip and tear the grass leaves instead of cutting them nicely. Most lawn mowers have enough force and speed that the dull side will still trim your grass. That’s because the grass will still get caught on the dull side of the blade. If the cutting edges aren’t able to cut the grass, you’ll likely end up with a shredded mess. If you accidentally flip the blade when you install it, the cutting edges won’t ever have an opportunity to cut your grass. That’s because the cutting edges on your lawn mower blade are designed to only cut in one direction. One of the most critical is that the blade just won’t work if it’s facing the wrong direction. There are a lot of reasons why it matters which side of your lawn mower’s blade is up.

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