Lawnmower on grass

My Lawnmower Won’t Start? Common Break Down Causes

Summer has finally arrived and that means one thing for your lawn – it will need cutting again. However, after months of being locked away in the garden shed, your lawnmower may not be in the same condition as you remember it.

We have put together a list of some of the most common problems that people find with their lawnmower when they dust the cobwebs off after the winter break.

Check The Fuel Tank

One of the most common problems with lawnmowers is often fuel tank related. The tank should’ve been emptied at the end of the last season, however, if it wasn’t, empty it out and if it was then it’s likely that it just needs refilling.


While you are refuelling or replacing the fuel tank, it would be a good idea to check that the oil and air filters are clear and in working condition, as these can cause issues with non-starting lawnmowers.

Engines Problems

A slightly more substantial problem would be issues with key parts of the mower such as the carburettor or engine. If the engine was flooded at any point during its winter hibernation, the mower won’t switch on. An easy way to establish this is to smell it because a flooded engine will smell of unburned fuel.


If it seems like an ignition problem, we’d recommend checking your spark plugs, examine if they need cleaning or even possibly replacements. You should also ensure the spark plug lead isn’t damaged. As it is a small component, it can often be overlooked and be the cause of your problem.


Although this won’t stop your mower switching on, a build-up of debris or a bent blade can cause a range of issues with the performance.

Once you’ve confirmed the cause and fixed the problem it is imperative to conduct regular maintenance of your lawnmower, as this will improve its performance and longevity. If you do notice any issues, it is vital that any repairs are carried out by a professional for your own safety.

Contact Us

If you are experiencing any of these problems, or require expert advice for your lawnmowers, then don’t hesitate to call us on 01234 741 185, or alternatively, use our online contact form. Our mobile workshop means that we can even come to you with our emergency call out support.