Question: What do you do when your lawn mower won’t start?

How do you get a lawn mower started that won’t start?

If you run into problems getting your lawnmower ready for spring, try the following:

  1. Use fresh gas. Old gasoline can cause starting difficulties. …
  2. Check the spark plug. …
  3. Use the choke. …
  4. Prime the mower. …
  5. Check the air filter. …
  6. Check the cables. …
  7. Check for water in the fuel tank.
  8. Clear the starter cord of blockages.

What would cause a lawn mower not to turn over?

There are many reasons a riding lawn mower won’t start—everything from stale gas to ignition switch problems. If you constantly have to charge the battery, a bad battery or failed alternator could be causing the problem. … Lawn mower ignition switch problems can prevent the starter from getting current.

How do you start a lawnmower that has been sitting?

To get the mower started, you may have to change the gas and clean or change the plug. Check the oil before you start a four-cycle mower that has been sitting for a long time. You may have neglected to replenish it the last time you used the mower. Prime the engine by pushing the priming bulb three times.

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Why does my lawn mower only run for a few seconds then dies?

If your lawn mower starts, runs briefly, then dies these are the four most common reasons that’s happening: Dirty carburetor / clogged carburetor bowl. Old gasoline that has gone bad. Dirty or defective spark plugs.

Why is my carburetor not getting gas?

No fuel at your carburetor can be caused by many things. It could be a simple issue like a fuel filter plugged so tight that no fuel can pass through. Another logical cause could be the fuel pump. … A hole in the fuel line on the tank side could also cause the fuel pump to suck air instead of fuel from the fuel tank.

Can a dirty air filter cause a lawn mower not to start?

Dirty or Clogged Air Filter



Before the incoming air enters the carburetor, it passes through an air filter to remove dust and dirt. When the filter is doing its job, it may get clogged up with debris removed from the air and not allow a sufficient amount of air into the carburetor and prevent the engine from starting.

How do I know if my lawnmower starter is bad?

A bad starter can manifest itself in a cranking noise without engine turnover, a clicking when the ignition button is pressed, or a mower that simply does not respond to attempts to start. An indication of a bad starter motor is the absence of other electrical problems that can be more easily tested.

Can old gas cause a lawn mower not to start?

If your mower won’t start because you’ve been using old gasoline, you‘ll need to remove the old fuel and any built-up residue in the engine. … Then, if the lawn mower runs for a few seconds and dies, the carburetor might be clogged or have old fuel in the float bowl.

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Is it bad to leave gas in lawnmower over winter?

Unused gas left in a mower over the winter can get stale, gumming up the carburetor and inviting rust. … Turn the mower off and allow the engine to cool, then siphon excess gas into a clean can. (You can put this gas in your car, provided it hasn’t been mixed with oil.)

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