Weed Eater XR-50 Fuel Mix Ratios

Weed Eater Fuel

• Before the fuel can get mixed, the right base of gasoline is required. Since the XR-50's engine runs at such high speeds, in usually hot temperatures, it needs a higher quality gasoline than other engines do. Weed Eater recommends a high-quality, nationally produced brand of gasoline with an octane rating of at least 87. They also note never to use gasoline with more than 10 percent of additives, such as ethanol, in the fuel mix. Using this fuel will ensure proper protection from the punishing environment the trimmer needs to work in.

Oil

• Just like the gasoline, the engine oil also needs to be of a high quality. This oil needs to break apart inside the fuel and mix evenly across the gasoline. So, for this oil, only use oil intended for use in two-stroke, air-cooled engines. Other oils, like those for your car or snowmobile, will not adequately separate and blend uniformly inside the fuel, which can lead to a loss of lubrication and eventual engine damage.

Fuel Mix Ratio

• Weed Eater sets the mix ratio for all of its two-stroke engines, including the XR-50, after considerable laboratory and field-testing. For this reason, it is imperative to follow the mixing instructions Weed Eater provides, and only adjust this mixture if absolutely necessary. Weed Eater sets its fuel ratios at 40-to-1 gasoline to two-stroke air-cooled engine oil. This mixture will allow the engine to burn hot enough for peak end performance, while keeping it lubricated and cool enough to continue operating.

Proper Blending

• For the fuel to do its job, the mixed fuel needs proper blending. If the fuel gets blended poorly, the oil won't distribute evenly inside the engine. Pour the mix oil into a clean, empty fuel canister. Add the gasoline on top of the oil, so the oil will break apart while the gasoline is added. Also, close the container and shake the contents before every refueling stop. Only mix enough fuel to use for 30 days, as the fuel will separate and no longer provide protection after this time.