Ideal ratio for a high performance engine

Thermal brushcutters, essential for the maintenance of gardens and green spaces, require a precise mixture of fuel oil to ensure performance and longevity. An incorrectly calibrated ratio can damage your engine, reduce its power or even lead to costly breakdowns. In this article we explore best practices for optimizing this blend, drawing on manufacturers' recommendations and products available on the market.

Because the right mix is ​​fundamental

A 2-stroke engine operates without a separate lubrication system, unlike 4-stroke engines. The oil must then be mixed with petrol to lubricate the moving parts. An inappropriate relationship leads to serious consequences : premature wear of the pistons, clogging of the carburettor or overheating of the engine.

Standard reports and recommendations

Brush cutter manufacturers like it FUXTEC OR Geotechnology generally specify a ratio 1:40 (1 volume of oil for 40 volumes of gasoline) for their high-end models. However, some less powerful engines, such as the GeoTech GT-2 52 L (52 cm³), tolerate one ratio 1:50 to reduce oil consumption.

«A mixture that is too rich in oil (ratio 1:30) can clog the spark plugs and the carburetor, while a mixture that is too lean (ratio 1:60) exposes the components to accelerated wear. »

Consequences of incorrect mixing

• Too rich a relationship :
• Formation of carbon residues in the carburettor and combustion chamber.
• Risk of difficult start or from slow down of the engine.
• Too little ratio :
• Wear of the piston rings and the cylinder.
• Overheated of the engine, which could lead to permanent failure.

Choosing the right 2-stroke engine oil

The oil must meet the standards APITC OR ISO-L-EGDdesigned for 2-stroke engines. Synthetic or semi-synthetic products offer better heat resistance and optimal lubrication.

Characteristics of a suitable oil

• Adapted viscosity : Oil that is too thick can slow down the engine, while oil that is too thin does not provide sufficient protection.
• Compatibility with additives : Some oils include anti-wear agents to strengthen part protection.
• Reduced odor and smoke : Quality oils reduce polluting emissions to a minimum.

Recommended brands and products

• FUXTEC : Offers 2-stroke engine oils in measuring bottles (1 L or 5 L), ideal for brush cutters.
• Stihl : High-end synthetic oils, compatible with powerful engines such as FUXTEC FX-PS162 (62 cm³, 2.6 kW).
• Oregon : Oils in 1:50 ratio, suitable for less powerful models.

Additives to optimize performance

Additives like Mecarun P18 It can supplement oil to reduce wear and improve engine smoothness.

Mechan P18: An anti-wear addition

This hyper-lubricating product reduces friction between mechanical partsextending the life of the engine. The recommended dosage is from 4% to 6% of oil volume during oil change.

“P18 is particularly effective for 2-stroke engines, as it neutralizes wear during each start-up, a critical moment for moving parts. »

Regular maintenance to extend lifespan

Rigorous maintenance, combined with optimal mixing, guarantees long-lasting performance.

Oil change and replacement

• Frequency : Change the oil next From 20 to 30 hours of operation for professional models like the FUXTEC FX-PS162.
• Procedure :

1. Let the engine cool.
2. Drain the used oil.
3. Clean the air filter and carburetor.
4. Replace the oil with a new mixture.

Cleaning the air filter and carburetor

• Air filter : Clean with a mixture of petrol and oil, then dry before reassembly.
• Carburetor : Regular disassembly to remove fuel and oil residues.

Practical advice for users

Preparation of the dough: fundamental steps

1. Measure the fuel : Use a measuring container to avoid errors.
2. Add the oil : Pour the oil into the petrol, respecting the recommended ratio.
3. Mix : Shake the can vigorously to homogenize the mixture.

Fuel storage and conservation

• Shelf life : Do not store the mixture for longer than 2 monthsbecause petrol oxidizes and oil loses its properties.
• Conditions : Store in an airtight container, protected from light and heat.

AND well-balanced fuel oil mixture It's the key to a durable, high-performance 2-stroke engine. Following the ratios recommended by the manufacturers, using quality oils and integrating additives such as Mecarun P18users can optimize the performance of their brush cutter while reducing maintenance costs. Regular maintenance, including emptying and cleaning, completes this approach to ensure a long life of the device.