My 873 has the Boss system and I am trying to figure out why the shutdown solenoid is loosing power intermitantly while cranking and only while cranking. Never when in the run position? It seems like it only does this when it is cold enough to need the intake heater. It never did this all summer long. The Glow system is working perfectly, good relay, good wire, good heater.What do you think...Bad relay? Bad Boss?