forklift won't start

At work we have a TailLift forklift that usually fires right up and runs great. It has a small propane 4-cylinder engine. Last night there was a driving rain with a wild temperature swing that left everything wet, if not from blowing rain, from condensation even though it as parked under cover. This morning, the forklift would crank like mad, but not fire. It is getting fuel (I smelled the exhaust) but the spark is weak. It will jump almost a quarter of an inch, but is orange, not blue. Could the problem be the soaked coil? We're letting it sit overnight to dry, but we need this thing running soon.
Oh yeah, the boss was using it yesterday and had no issues.
Thanks for any help.

Not knowing much about that particular machine I would say plug wires, cap and rotor would be most likely things to check and dry. If it's newer and has coil packs then pretty much just the boot or coil itself to question

About the only thing WD40 is used for in my shop is to dry out ignition systems. Give it a try, especially if your lift has a distributor cap.

Ed, Remove the distributor cap and you will see that it is wet inside. Dry it out and rotor and the inside of the distributor.Use a hair dryer,heat gun or air hose and blow gun.

I truly dislike working on fork trucks. I disliked working on them from the 1960's. I just had a set of points short out against the shaft day before yesterday. Went to put the new ones in yesterday and dropped the screw from my crippled hand and it disappeared into the gob of hoses and crap. Spent an hour digging with a magnet thru the junk and oily dirt. Ended up with an air hose blowing crap all over but not until I had rolled and reached until I was a grease dirt ball. Then the only way to get new points for old stuff is take the old ones to compare with fifty some new ones as they list several different distributors for that serial number.
So many place to catch and hold water and dirt If I had your problem I would first blow from the top down every thing with compressed air and then as stated remove the cap. I would remove the cap and wires together. Then place them in an open warm oven, wipe the plugs and take a hair dryer to the points in the distributor. That is if you can get to the back clip or screw on the back side of the distributor. I don't do it but sometimes think it would be easier to pull the distributor to remove the cap if you could get your hands down with any size wrench to loosen it without a cutting torch which I threaten to do every time I have one down.