The hum of a lawnmower, a familiar summer sound, can be interrupted by a frustrating problem: your mower won’t start. One of the most common culprits? Using the wrong type of fuel. This article will dive into the world of lawnmower fuel, explaining what kind of petrol you should be using, why it matters, and how to make sure you’re fueling your machine correctly for smooth, efficient operation.
In short, most modern lawnmowers run on regular unleaded petrol, but there are nuances to consider, including octane rating, fuel additives, and the importance of fresh fuel. This guide will help you understand those nuances and ensure your lawnmower runs smoothly for years to come.
Understanding Petrol for Lawn Mowers
The type of petrol you use in your lawnmower is crucial for its performance and longevity. Modern lawnmowers are designed to run on regular unleaded petrol, but there are some key factors to be aware of:
Octane Rating
Octane rating is a measure of a fuel’s resistance to knocking or detonation, a phenomenon that can damage an engine. Higher octane ratings offer greater resistance to knocking. Most lawnmowers recommend regular unleaded petrol with an octane rating of 87 or 89. Using a higher octane fuel, like premium, won’t harm your lawnmower, but it won’t provide any additional benefits either. However, using fuel with an octane rating lower than recommended can cause knocking and engine damage.
Fuel Additives
Many petrols available today contain additives designed to enhance performance and protect your engine. However, certain additives can be detrimental to lawnmower engines. For example, some ethanol-based fuels can cause issues with the fuel lines and carburetor. It’s best to choose petrol that has a low ethanol content, preferably less than 10%. Look for “ethanol-free” options whenever possible.
Fuel Age
Fresh fuel is crucial for optimal lawnmower performance. Over time, petrol can degrade, becoming less volatile and harder to ignite. This can lead to starting problems and poor engine performance. It’s best to use petrol that is less than 30 days old and to store your petrol in airtight containers in a cool, dry place.
Why Fuel Matters
Choosing the right petrol for your lawnmower is not just about ensuring it starts. It directly impacts:
Engine Performance
Using the recommended petrol ensures optimal engine performance. The right fuel allows for complete combustion, maximizing power and minimizing emissions.
Fuel Efficiency
Using the wrong fuel can actually decrease fuel efficiency. Poor combustion can lead to wasted fuel, costing you more in the long run.
Engine Life
Using the correct fuel helps protect your engine from damage caused by knocking or improper combustion. Regularly using the right fuel can help extend the life of your lawnmower engine.
Top Tips for Choosing the Right Petrol
Here are some practical tips to ensure you’re fueling your lawnmower correctly:
Check your manual
The most reliable source for information on the type of fuel your lawnmower requires is the owner’s manual. It will specify the recommended octane rating and any other fuel-related considerations.
Look for “ethanol-free” options
When possible, choose ethanol-free petrol to prevent fuel-related problems. Ethanol can cause corrosion and gum buildup in the fuel system.
Use fresh fuel
Always try to use petrol that is less than 30 days old. Store unused petrol in airtight containers in a cool, dry place to prevent degradation.
Don’t overfill the tank
Filling your lawnmower’s tank beyond its capacity can create pressure and lead to leaks or spills.
Avoid using old fuel
Never use old or stale petrol, as it can gum up the engine and cause problems.
Conclusion
Fueling your lawnmower correctly is essential for its smooth operation, efficient performance, and longevity. By understanding the type of petrol required, considering octane rating and fuel additives, and choosing fresh fuel, you can ensure your lawnmower runs smoothly and efficiently for years to come. Remember to always refer to your owner’s manual for specific recommendations and to prioritize fresh, ethanol-free petrol for optimal performance. With a little care and attention, you can keep your lawnmower running like a dream, ensuring a perfectly manicured lawn every time.
Frequently Asked Questions
1. What type of petrol should I use in my lawnmower?
The type of petrol you should use in your lawnmower depends on the specific model and recommendations from the manufacturer. Generally, you should use unleaded petrol with a low octane rating, typically 87 or 89. Using higher octane petrol is not necessary and can even be detrimental.
Avoid using petrol with additives like ethanol, as it can cause problems with the fuel system and damage the engine.
2. Can I use regular petrol in my lawnmower?
Yes, you can use regular unleaded petrol in most lawnmowers. However, it’s essential to check your owner’s manual for specific recommendations. Some lawnmowers might require a slightly higher octane rating, but regular petrol is generally suitable for most models.
Using the wrong type of petrol can lead to engine problems and damage, so always refer to your owner’s manual for the correct fuel specifications.
3. What about E10 petrol?
E10 petrol, which contains 10% ethanol, is generally not recommended for lawnmowers. The ethanol can attract moisture and lead to corrosion and gumming in the fuel system.
It’s best to use petrol with a lower ethanol content or avoid E10 entirely to ensure the longevity of your lawnmower.
4. Can I mix petrol with oil in my lawnmower?
No, you should never mix petrol with oil in your lawnmower. These are separate fluids that serve different functions. Petrol is the fuel that powers the engine, while oil lubricates the moving parts and prevents wear and tear.
Mixing them can cause significant damage to the engine and result in costly repairs.
5. How do I know if I’m using the right petrol?
Always check your lawnmower’s owner’s manual for specific fuel recommendations. It should clearly state the type of petrol to use, the octane rating, and any additives or blends to avoid.
If you don’t have the manual, you can look for a fuel label on the lawnmower or consult the manufacturer’s website.
6. Is it safe to store petrol for my lawnmower?
It’s best to store petrol in a well-ventilated area, away from heat sources and direct sunlight. Use a properly labeled container designed for petrol storage.
Avoid storing petrol for extended periods, as it can degrade over time. Fresh petrol is always recommended for optimal engine performance.
7. What should I do if I accidentally put the wrong petrol in my lawnmower?
If you’ve accidentally put the wrong petrol in your lawnmower, it’s important to act quickly. First, try to siphon out as much of the incorrect fuel as possible.
Then, run the engine for a short period to help clear the fuel lines. Afterwards, fill the tank with the correct petrol and run the engine for a few minutes to ensure everything is working properly.