Diameter of B6100 lower rad hose?

[ruready1]

Hello,
Well we finally got our cold snap and our equipment is NOT liking it! Can anyone tell me what diameter the lower radiator hose is on a B6100? I'm needing to pick up a heater and haven't a clue what size it'll need. I wouldn't worry about it that much except the new Ford 860 DWARFS the only blade I have (a King Kutter XB 5')!

Thanks all!!!
Mike