So we've had our Zforce 600 since 2013 brand new off the show room floor.  Rode it quite a bit this weekend,  you know water, mud, rocks, etc.  towards the end of the weekend it was giving us trouble starting.  It will run as long as the key is held in the start position in the ignition switch pretty hard to drive that way though. After holding it there for a while you can release it and it will staying running.  My initial thought was the starter, but then that doesn't make any sense because it's kicking over the engine.  Any thoughts?

[2015 Z Force 800 53/Trail EPS]

So we've had our Zforce 600 since 2013 brand new off the show room floor.  Rode it quite a bit this weekend,  you know water, mud, rocks, etc.  towards the end of the weekend it was giving us trouble starting.  It will run as long as the key is held in the start position in the ignition switch pretty hard to drive that way though. After holding it there for a while you can release it and it will staying running.  My initial thought was the starter, but then that doesn't make any sense because it's kicking over the engine.  Any thoughts?

Indicates no system power in the RUN position, only in the starter position. Likely the switch but can also be fuse or connection related. Water...is not your friend...especially on sub-standard Chinese electrical components. And of course, holding the key in the starter position I would think makes the starter motor continously run and will take it out in a very short time as well. Starter motors are not supposed to be energized for more then 15-20 seconds at a time.