Busaboy
.040 Over
Anyway, there has been a lot of discussion about the inadequate size of the ground wire on the rocket and many people have changed it out to help improve starting. You don't need to replace the wire if you don't want to and I consider doing so to be a waste of time. All you need to do is add a 6 gage wire to the battery negative terminal and ground it to the chassis. This will add up to 70 amps of current carrying capacity from your negative battery terminal to chassis ground. It is foolish to think just because your not grounding directly to the engine that your not adding more capacity with the extra wire. Adding the jumper wire will exceed the ground current capacity that you might get if you changed your existing single ground wire to a 2 gage ground wire.
Don't ignore the Start switch. It has to pass a lot of current for the starter solenoid. It is not a sealed design and water and contaminants can get trapped inside. My biggest starting issue was due to this switch. Be careful not to damage the elements by being to aggressive. You do not want deep scratches in any of the contact areas. I used vinegar, chrome polish and a lot of patience.