stx38 dies when pto engaged - old man needs help!
At wit's end. Last week STX worked okay. Got it out today, engine dies when PTO engaged; blades turn, but engine begins to die - cut switch off, engine catches and continues to run. Have worked my way through every thing I can think of - obviously, I've overlooked something. Here's what I've done (all tests in accordance with Deere repair manual):
Released tension off deck drive belt. Spindles turn okay, blades do not hit deck. Idler pulleys turn freely.
Tested seat switch, okay. Getting 12.63 volts at PTO. Continuity at PTO okay. Coil resistance check, 6.3 Ohms, within normal range.
Start switch tested, all okay. PTO switch tested, okay.
Did not test neutral switch, but it functions properly as far as not letting starter engage when transmission is in gear.
Have NOT measured PTO clutch air gap. Did NOT try engaging the PTO while the deck drive belt was off - wish I had, but I've given up for the night.
What am I overlooking, and what should I do next? By the way, this machine has a Warner PTO.