Little help with a "hot starter"

[Zonaman]

I've noticed that my starter will quit on me after a long drive to the lake, hauling my boat in 100+ temperatures. It'll quit working for a few minutes, then it will turn. That's so far. Since this tends to happen on a boat launch ramp, you can understand my concern! I gather from reading some past postings that it's absorbing too much heat from the headers.

My questions:

• Is this a temporary condition that a heat sheild will cure or is this casuing permanant damage to the starter?
• I've also noticed that it will grind occasionally (a few times in the last month). Is this a sign that it's on it's way out?
• If a new starter is in order, what are your recommendations for a daily driver in the desert?

Thanks!

(PS- I will check to be sure the wiring is in good shape!)