When the temperature dips below the mid 30's, my Jinma 304 will frequently spin the starter but not actually rotate the engine with the turn of the key. I have a 2004 with the non-epa engine. Using the decompression release does not rectify the situation. However, after 3 or 4 engagements of the starter it will typically turn over the motor. Anyone else encounter a similar problem? Any suggestions on the next step I should take? I've had the tractor for more than a year, so if I'm going to do anything to address the problem it will be on my own.