A perfectly maintained lawn mower works with sharp blades, which are essential for a velvety-smooth lawn. Therefore, check the lawn mower blade in the spring to see whether it is dull and whether it makes sense to change it. These instructions explain step by step how the exchange is successful.
How do I change a lawn mower blade?
To change a lawn mower blade, pull the plug (electric mower) or remove the battery (cordless mower). Spark plug cable (petrol mower). Then fix the knife, loosen the screw and remove the old knife. Insert the new knife and tighten the screw.
How often should lawnmower blades be changed?
There is no hard and fast schedule for replacing lawn mower blades. The interval at which the knives should be changed depends on various factors. The level of stress is just as important as the amount of care required or the quality of the winter quarters. If a commercial lawn care professional replaces the cutter bar every 4 months, this may only make sense for a private lawn owner every 1 to 2 years.
In this question, follow the rule of thumb: Change dull lawn mower blades before the first lawn cut in spring. This premise applies equally to electric, cordless and petrol lawnmowers.
Material, tools and preparatory work
Safety is the top priority when changing a lawn mower blade. When purchasing, make sure that the new knife bar is suitable for your model. If the blade and lawn mower do not fit together, significant damage is inevitable. You will also need a wrench (€125.00 on Amazon) and work gloves. This is how you prepare to replace the knife professionally:
- Electric mower: pull out the power plug
- Cordless mowers: removing the batteries
- Petrol mower: pull out the spark plug cable, close the fuel tap and tilt with the carburettor upwards
It is beneficial to have a helping hand to hold the lawn mower while loosening the screws and replacing the blade.
How to replace lawnmower blades correctly – instructions
Once you have taken all the safety precautions, you can fully devote yourself to changing the lawnmower blade. This is how you proceed professionally:
- Fix the knife bar with one hand or a piece of wood or knife blocker
- With the other hand, loosen the screw with washer and put it aside so that it is within easy reach
- Pull out the knife with slight twisting movements and place it at a safe distance
- Place the new knife bar flush on the screw opening and hold it in place
Finally, screw in the screw and washer and tighten well. Please hold the knife with one hand while turning the wrench with the other hand.
After replacing the blade, place the lawnmower back on its wheels. On the petrol mower, place the plug on the spark plug and open the petrol tap. Insert the accumulator into the cordless mower.
Tip
Are you looking for a lawn mower that doesn't make any noise, always has sharp blades and creates an English lawn? Then we would like to recommend a modern cylinder mower to you. This type of lawn mower is operated manually, mows the stalks using a scissor cut and has self-sharpening blades.
