Some Great Tips For Lawn Mower Maintenance and Repairs. There are a number of things you need to know in order to ensure that you can properly and effectively maintain and repair your lawn mower engine. Pay careful attention to your lawn mower in an effort to keep it in the best condition for the next mowing season. We’re going to show you… Before you try to repair your mower, make sure to remove the spark plug lead and secure it away from the plug.. Clean and replace the spark plug and also clean the rotor contacts as well.. If your lawn mower engine coughs and sputters there may be a problem with one of the three things that your engine uses to run on.. A rattling sound in your lawn mower may mean that there’s a loose blade. You need to be very careful with the old blades when changing them, because of their extremely sharp edges. When loosening up a blade bolt, use a wrench which is not offset, then “…place the box end wrench squarely on the bolt and strike the far end of the wrench with a 16 to 24 oz hammer with repeated moderate blows.”. If you’re having fuel problems, it may be that there is a disruption with your fuel line or carburetor.. When using your lawn mower and you realize that you’re having a hard time pulling to start it up, it’s a sign that you have to clean the grass from the bottom of the lawn mower.. Don’t touch an internal-combustion engine, while the engine is warm. There are a number of components that may rise past temperatures of 1,200 degrees Fahrenheit or 649 degrees Celcius. If you are looking for small engine repair services in Ottawa, mobile car battery boosting, lawn mower and lawn tractor repairs and tune-ups, or snow blower repairs then give us a call to book your mobile small engine repair today. We fix, repair, and tune-up small engines such as lawn mowers and snow blowers. The best part is that we come to you so no more waiting in line or traveling back and forth to fix your small engine equipment.