Easiest way to find it is to follow the large battery positve cable to it. It will be behind the large black plastic cover on the starboard side if the engine. Any electrical starting problem would have my attention immediately. I would'nt let it go at all, it's trying to tell you something.
If you have a 12 volt test light, have someone help you check for power at the starter while you turn the key. If you do this in the driveway, be sure to disable the ignition by removing the safety lanyard so it cant start, you only need it to crank over.