Primer Bulb

thingiverse

This is a cold start primer bulb for small 2 cycle engines such as a weed eater or chain saw. This should work with flexible filaments if they are resistant to gasoline and the layers adhere well. I made this as a quick fix for my weed eater to save myself a trip to the store. It should hold up for a little while. You may need to add a small spring so pops back out after its pressed.