Noise management data sheets: reel mower

Check all chain and belt drives for correct tension. A slack chain can rub against its cover creating noise.
Ensure all covers are securely fastened. Check the "gear lever" for rattling in its selector plate.
Adhesive gaffer tape may be applied to the area on the lever that produces the noise.
Ensure the muffler is in good condition (no holes) and is bolted firmly to the side of the engine.
Ensure throttle control is in good working order and regulates the revs of the machine in a smooth manner.
Maintain lawnmower to ensure efficient running and easy starting.
Machines that do not operate efficiently require higher revs and make more noise.

The noise level of a four stroke (Briggs and Stratton powered) lawnmower 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.
Reel mowers do not normally exceed 92 dB(A). Sometimes high noise levels may be emitted from the blades. If this is the case check the following points:
- The cutting height may be too low causing the fixed blade to be forced against the cylinder.
- The adjustments to the fixed blade may be incorrect. The blade may be set too close to the cylinder (this can cause damage to the cylinder called scalloping) and should be backed off. If this results in loss of cutting ability then the cylinder and fixed blade should be reground professionally and set back in the machine.

On replacement, specify and purchase a mower fitted with a "low tone" low noise level muffler. Test run several different types of mower and take the noise levels into consideration when making your final choice.

Adapted from the Noise Control Manual for Schools with the permission of the Education Department of Western Australia.