This unit has a Fortis engine. When you turn the key the starter starts cranking and then almost stops but then continues cranking until unit starts. My understanding is that this is normal for Fortis engines. This particular unit though when you start cranking and it gets to the point of almost stopping....the starter does indeed stop. It will not start cranking again until you turn the key off and reset it. There are no engine codes. Starter amp draw is good at 131 amps. Unit cranks at 10.8 volts. Any idea as to what is going on here? Thanks.