1949 starter help needed

[limo Jason]

I have a 1949 Series 75 and I'm having some electrical issues with the starting system.  The car is still 6 volts.  In the past it was changed to use two 6 volt batteries with a series parallel switch so it would crank better.  It works well and I really have no desire to change it.  Every now and then when I would push the starter button the starter would just go "Click" and nothing else would happen.  Usually the next try it would start as normal.  Lately its been getting worse. I almost got stranded at a car show last weekend and today I had the same issue.  I think my neutral switch is ok. Am I having issues with the relay?  Is the starter going out?  what do you all think?  1949 is a one year only starter I believe so I would like to trouble shoot a but before I start throwing money at things that don't need replaced. Thanks   

[35-709]

First thing I would look at is the starter solenoid.  Your description sounds very much like a disassembly of the solenoid and cleaning of the contact disc is in order. 

[Jay Friedman]

Are you sure the batteries aren't getting old and weak?