Noise management: Edgers

• Ensure all covers are securely fastened. Check for rattles. 
• Check that the muffler is in good condition (no holes) and is bolted firmly to the side of the engine. 
• Operate the throttle control and make sure that it is in good working order and regulates the revs of the machine in a smooth manner. Some edgers have a plastic carburettor body and if not serviced regularly, can suffer from a sticking cam and lifter assembly within the carburettor. 
• The blades should be free running (not hitting against guards) and not worn down. 
• Maintain services to edger to ensure efficient running and easy starting. 

Note: Machines that do not operate efficiently require higher revs and make more noise.  

The noise level of a four stroke engine can be reduced by fitting a 'Low Tone' muffler to the engine. These mufflers reduce the noise level by approximately 3 dB(A) more than the standard muffler and are available from most mowing equipment suppliers. 

• Do not "over rev" machine - use only enough power required to perform work. 
• Mark normal operating revs on throttle control. 
• Avoid hitting curbs with blade. 
• Ensure staff are adequately trained in correct use of the edger. 

• Use manual methods such as a spade or step on type edger where possible. 
• In some country locations gardeners have reported that use of a broad spectrum herbicide has resulted in the edger being no longer used. In this process the grass overlapping a path is poisoned with a spray. A neat edge can be achieved with practice. 
• On replacing the edger, specify and purchase a four-stroke edger (these tend to be quieter) fitted with a low tone muffler. Test run several edgers and take the noise levels into consideration when making your final choice.