40:1 is the gas to engine oil ratio.
Better said. 1 gallon of gas to 3.2 oz of 2 stroke engine oil.
McCulloch has a product, "One Shot", that conveniently comes in a 3.2 oz container.
service manual for a mac2816 linetrimmer
Locate the trimmer head at the shaft. Remove debris in the head. Cut a 14-inch piece of the trimmer line and fold it. Place the spool against the spindle. Feed the ends of the line through the eyelets. Push the spool down and pull the trimmer line tight with your hands. Tighten the spool.
most two stroke engines need a 2% mix but you should look at the manufacturer recomondation.
Percent MAC is the ratio of the CG measured from the LEMAC (leading edge of MAC) to the total MAC. Use the formula "CG (inches from LEMAC) / MAC (inches) x 100.
Mac 310 fuel/oil ratio is 40:1
MOst are PC's Mac's are usually for graphic design oriented users. I would say 20/1 or more even.
The full ratio according to the embossed diagram on my Mac Cat 435 fuel cap is 40:1. Hope this helps.
Hi, Back when it was manufactured, it called for 16:1. Gas was different back then also. Mixing at 32:1 with a high quality oil should work fine.
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If using an oil other than McCulloch, the ratio is 40:1. Brand Specific McCulloch two cycle oil is 20:1.
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