Lawnmower Won't Start? A Complete Troubleshooting Guide

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Lawnmower Won't Start? A Complete Troubleshooting Guide

Lawnmower Won't Start? A Complete Troubleshooting Guide

4 April 2016
 Categories:
, Blog


There is nothing more frustrating than heading out to mow your lawn only to find out your lawnmower won't start. While there could be several reasons why the mower will not start, they all boil down to it either being a mechanical or electrical problem.   

There's a specific series of steps you should take when troubleshooting your mower. At the end of each step, try starting your mower. If it doesn't start, move on to the next step.

Step One: Check the Fluids

The first thing you should do is check the fluids. If this is the first time you've tried starting it for the season, make sure that your mower has gas and oil. If you didn't drain the gas and oil before storing your mower for the winter, drain them and put new fluids back in. Oil left in the mower over the winter will become sludgy and will cause your mower to stall. Old gasoline in the motor will also cause issues for your mower. If your mower has a 2-cycle engine, make sure you are using the correct ratio of oil-to-gas for your engine.

Step Two: Check the Spark Plugs

Once you've established that fresh and clean fluids are in your mower to the correct ratios as needed, you'll want to check the spark plug. Remove the plug from your mower and check the firing gap for any carbon residue. Clean the plug and reinstall it. If the mower doesn't start, replace the spark plug. Consult your owner's manual to ensure that the new spark plug has the proper gap.

Step Three: Troubleshoot Your Lawnmower

The next step in troubleshooting your mower is to inspect the joints where the mower blade attaches to the motor. If this area is rusty, the blades may not move easily. Clean the area and lubricate the axle making sure the blade moves easily. Be very careful when working around the blade. (Note: if this is the first start of the season, this is a perfect time to have the mower blade sharpened. You should sharpen the blade at least once a season to maintain peak performance)

Step Four: Check the Primer Bulb and Fuel Lines

Next, check the primer bulb for your mower (if it has one) and check the fuel lines. Look for any leaks or cracks in the lines. Check the air filter as well. While it's not likely that a clogged air filter is the sole cause for your mower not starting, it will add to the issue.

If you haven't found the problem after going through this checklist, it may be time to take the lawnmower to an expert for help. 

For further assistance, contact lawn maintenance professionals, such as those from CNS Property Services & Landscaping Ltd.

About Me
using lighting to beautify your landscaping

Even the most beautifully landscaped yard can look boring after the sun begins to set. How can landscape lighting be used to create a unique and beautiful landscape design? My blog is all about using lighting in your landscaping design. I will show you how to use lighting to illuminate the big trees in your front lawn and the smallest flowers in your beds. I hope that all of the trial and error that I have done over the years will help you skip the errors and go straight forward to the successfully stunning property even after the sun has set.