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I’m looking for a heavy duty sewing machine.

Semi related questions about maintenance for weed trimmers here? But first, thank you for posting about repair/ maintenance. I have a Senix 46cc 4-sroke back pack brush cutter. what fuel is okay to put in it? The sticker on the tank shows to use E0 or E10, and not to use E15 or E85. I don’t know where to buy E0 or E10, or maybe I just don’t know where to look. I’m Also looking for where and what trimmer line is best to use. It has a fixed line head and came with some pre-cut lengths of black twisted line but it doesn’t last as long as I think it should.