I keep my 8N outside, so it gets exposed to the cold here in Ohio. It starts right up without any problem, though. However, this weekend when I started it up I had a problem. Specifically, when I let the clutch out the engine stalled. And I couldn't get it in gear. It was acting like the PTO was engaged, but the shaft wasn't moving. And turning the PTO lever to the off position didn't help any. The clutch is obviously working, but does this sound like a case of frozen hydraulic fluid/water in the gear box? Is the fix just to wait for a warm sunny day?