I have misplaced the instruction book for my weedeater and can not remember what the gas to oil ratio should be for my model. Are they all about the same? I have a Craftsman Incredi-Pull trimmer/edger, model #316791890, as best I can can read the label for it is faded.
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Two cycle engines run on a mixture of gasoline and oil. Each engine type is designed to run on a specific gas-to-oil mix ratio.
IMPORTANT: Use only oil that is labeled for use in "Two-cycle" or "Two-stroke" engines. Home Depot and other stores now have "premixed fuel" of gas and 2 cycle oil.
To mix two-cycle fuel, start by putting correct amount of oil in gas can. Then slowly add correct amount of gasoline. Do not try to mix gas and oil directly in gas tank of equipment.
IMPORTANT: Do not use any fuel that is over 30 days old. Do not mix more fuel than you are likely to use in a month. Old fuel can gum carburetors and prevent starting. Always use fresh fuel.
The chart below shows correct amount of oil per gallon that each mixing ratio requires. Expect that yours will be between 32 gas to1 oil and 50 to 1. 32:1 and 50:1 are most popular. RatioGAS:OILUNITED STATESOIL per 1 U.S. GALLON Gasoline
(128 oz.)*INTERNATIONALOIL per 1 IMPERIAL GALLON Gasoline
(160 oz.)*INTERNATIONALOIL per 1 LITER Gasoline
its a 40:1 ratio. remember to never tap the tap-n-go too hard or it will bend the shaft, and make the head hot to the touch, and eventually will melt the inside. And always keep fuel stabilizer in the gas, because if you dont, especially in winter and fall, it will clog the carb so you have to keep pumping the throttle to keep it running and you have to run it on half choke all the time