Bob, I also have an '08NH and have had the intermittent start problem for years.  I replaced the Y cable about a year ago - no change.  So this summer I bought a replacement new Bosch starter from Rock Auto for $171.  It was easier to replace than the Y cable was and I have had no start issues since.  So while the Y cable could be the culprit, my experience showed it to be the starter....
Orin Score
08NH Wisconsin
80,000 miles