what does the oil and gas mix at if you are doing it yourself. is it 40,32,or a 50 to 1 ration. also how do you replace the spark plug cap. mine is worn out and vibrates off at speed.

 

mix it at 40:1 or 42:1 for the fine tuner,,i've tried many mix ratio,the latest was at 35:1 and oil was spitting out the reed cage so,alot too rich,50:1 is fine but tend to wear out the piston too fast than you would like to be,,
in the park plug cap,i would change the whole wire tough,,,you just have to screw them in til a normal tension is
obtained...