Have one with intermittent starting problems.  Where the battery is stored there are two fuses in a white connector with two red wires into it.  Seems like I have to continue to clean them for a clean start.  If I  have the charger on it turns over no problem and starts.  Battery checked out but didn't do a load test on it.  Once charger is off of it it's a crap shot.  Will replace battery and check grounds.  Anybody else had a similar situation and what was your cure?  Grandsons make crazy faces when it won't start.  Thanks for any input.