Deutz 1011F starting hard, smoking a little.

I ended up buying the 883. Its the hardest starting Deutz I've ever seen. On a 45F day, it took a minute of cranking to get it to light off. Not sure if glow plugs are working but it shouldn't matter...My other 2 machines crank over twice and fire, without glowing on a day like today. 2900 hours, dealer serviced. Smokes a little as well...bluish/black smoke. Air filter doesn't look too good, will be ordering all new filters this week. I'm leaning towards timing belt jumped or valves too tight. Any guess's?

Deutz 1011F starting hard, smoking a little.