Sounds like the propane is to rich. 14,000 rpm seems OK for propane start. I would think that 36,000 rpm would be the engine running idle setting. Also, if the coils are hangin' out in the breeze, they may not get hot enough to ingnite the propane. Try just pulling three coils out just enough to clear the visual line of site from the plug base (looking from the side)and back off on the propane. Hope this helps.

good luck!
Kim Garner