It doesn't click, you just turn it out very little, the SKs low end is very touchy on mine. If you go to tower and read up on glow plugs you will notice the A3 is a hot plug for .10 to .60 engines, the #8 is used for most the rest of the two strokes. Reason I said try an F is because they retain the heat longer and don't cool down as fast. Just turn out the low end enough to see it move, a 1/16th is a big move on these engines, just a little at a time!! I have a very long screw driver and do it with the engine running so I can hear it, sometimes I use a tach so I can see the rpms.