Is there any measurable way to determine if a starter is spinning the engine fast enough? My lightweight starter doesn't seem to be spinning the engine fast enough and it is becoming harder and harder to start, even cold but especially hot. I'm considering swapping it out for a heavy duty starter and if that doesn't fix it, I might have the adapter replaced, but I'd like to have some sort of benchmark to let me know if that might actually help. The current starter is about 2 or 3 years old and we have really tried to follow the advice regarding starter engagement times and cooling off periods, but it seem half of our startups are hot-starts and make higher demands on the battery and the starter. (It is a relatively new Concorde battery).