DuraDoo

Need some help.  I have a 10.5 800 etec shorty with 900 miles on it.  Never had any issues until yesterday.  Went riding, put on 40 miles when we stopped for gas.  Went to start sled, electric start wont do anything, cheked fuses, stop button, still nothing.  Then all of a suddon it starts.  After that would do it everytime we stopped.  Got it in the shop today, and cant get it to start at all the the button.  I put new fuses in it, both the 30 and 5 amp. Charged battery just to be safe.   I can cross the solenoid and sled fires rite up.  Even if the sled is already warmed up the rer/estart button wont kick into reverse.  But after 10 minutes of running, it will.  Cant figure it out.  Any ideas would be a big help. thanks