Iv'e been searching for the the right spark plug for my Tec. HH150.. The manual says an L-7..
There is a L-86c in there now,,and wondering if it might be too hot.. I would like to try the cooler L-7. just to see if it runs any better,, or different..
What are you people useing in your'e Tec.s AND what is a good replacement for the L-7 ??