When operating the mower, whether gasoline or electric, it is important to monitor the condition of the cutting headset - the blade or knives (depending on model). You should regularly inspect the integrity of the blade: for damage, deformation and chipped. Any violation of the integrity of not only affects the proper operation of the mechanism, but also on safety. A deformed or cracked blade, may at any time break and pieces may cause considerable harm to the operator! Also, the deformed blade rotates out of balance with the engine, which directly affect the service life. Therefore, even if you do not see a visual distortion, but feel the increased vibration, we recommend to immediately stop the operation and contact the experts, if the vibration remains when replacing the blade.
Easy replacement of the blade can help, but unfortunately not always the case! Usually a blade deformation - a consequence of hitting an obstacle. Beat an obstacle - a sudden stop, most lawn mowers are designed so that the blade is attached to the drive motor through the coupling. And often at impact can bend not only a blade, but the motor shaft. Therefore, once again, if after replacing the blade vibration is present, please contact the Service.
By the way do not try to align the blade! You are unlikely to get it, lawnmower blades - is not just a metal band. Almost all the blades have a special shape, for better mulching and release of cut grass. A blade to equalize, observing all technological twists, almost unreal! And after installation "rectify" the blade, the vibration remains, and work with vibration, as mentioned above, it is forbidden.
But if you feel the vibration of the mower, and there was no strike or grass mowing is not uniform - it is simply a consequence of mechanical wear of the blade. In the operation of the mower blade grow blunt and wear out. From the sharpness of the blade, the quality of mowing depends. Therefore, for the sharpness of the blade should also be monitored.
You need specific skills and some equipment to properly sharpen a blade mower needs. At home, we recommend just right (slightly erode) blade. For this purpose, also need some devices and tools. As is the case with oil change, we need a place. Then prepare the instrument: metal brush, a small block of wood, or a socket spanner, angle grinders machine with a grinding wheel and a screwdriver.
After site preparation and instrument, start work. Close the fuel tap (if available), take off cap from the spark plug. Then the mower to rotate or tilt, so that we have a free access to the blade. In the case of lawn mowers with the engine Honda GCV Series, turn the mower on its side toward the oil filler cap. If the engine is different, follow the instructions of the manufacturer, usually on the same side or back. It is important to provide that the engine oil does not get into the carburetor, air filter and exhaust system. Further actions will be considered by the example of the mower Honda.
Blade wedged a piece of wood, in any case, not the stopper blade by hand or foot, the probability of injury! Then the socket (Spanner) key turn away a fixing bolt or bolts (as in our case) and remove the blade. If the blade under the substitution, then set a new and assemble in reverse order, the screws are clamped given the effort recommended by the manufacturer. If you need to sharpen a blade, then we continue.
Blade sharpen mower on the inside, so we filmed him! The cutting edge is usually 5-15 cm, however not necessary to sharpen the blade along the entire length. Point angle 30 - 40 °, the length of the sharpening guided by the old trail. Sharpen recommend using angle grinders with the attached grinding wheel, as shown above, by using such a circle you're shooting small metal layer and the probability to remove the excess is reduced. Sharpening should uniformly from both ends of the blade, in order not to disturb the balance. After sharpening, insert a screwdriver into the center hole and hang out the blade horizontally, not one party should not outweigh! If any side outweighs the heavier end even undermined.