How to check a ride-on mower spark plug gap
The spark plug gap on your Husqvarna ride-on mower is an air gap between the ground electrode and the centre electrode.
If the gap on your ride-on mower's spark plug is too small, the spark struggles to ignite the fuel and air mixture. If the gap is too large, it can make it difficult for the spark to bridge the gap for the ride-on mower spark plug.
Over time, the electrodes wear away due to the constant arcing of sparks.
This can lead to the gap becoming larger and might result in difficulties with starting your ride-on mower.
Measuring the spark plug gap on a ride-on mower
To measure the spark plug gap on your ride-on mower you can use
- a feeler gauge
- a coin
- a wire
- a blade
Use the tool to measure the gap by sliding it between the electrode tips.
Place the correct blade or wire from your gap tool between the tips of the electrode, or use a coin to find the measurement.
Be careful not to touch centre electrode, as damaging it will require you to replace the spark plug.
Check if the ride-on mower's spark plug gap needs adjusting
If the tool goes through the gap without touching the electrodes, the gap is too wide.
If the tool does not fit through the electrodes, the gap is too small and needs to be widened.
If the tool fits closely to the specified measurements, the spark plug is ready to be installed.
Adjusting the electrode gap on a ride-on mower
Hold the spark plug with the electrode facing down.
To narrow the electrode gap, gently bend the bottom electrode toward the other one.
- If you are struggling to adjust the gap with the tool, try pressing the electrode gently against a flat surface like a table.
To widen the electrode gap, gently bend it outward.
- Never bend too much. Always use very light pressure, as spark plugs are delicate and can break easily causing misfires.
After adjusting the electrode gap, make sure to re-measure it so it is a correct for your ride-on mower.
Correct electrode gap for my Husqvarna ride-on mower
Depending on the type of your ride-on mower, the electrode gap can vary.
Always check your ride-on mower's operator's manual for the correct electrode gap.