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Discussion Starter #1 (Edited)
I have searched all over the Internet and there are 100s of threads about this, but every one I have read a guy will state what his problem (or problems) are, every one will chime in, original poster says "I'll try all that and report back" and they never do. So I promise however this turns out I will come back here and finish this. I'm going to lay out where I'm at and what I've done so we can skip a lot of the usual things. As the title says it's a stock 94 XLTSP, a little over 2000 miles.
1. Compression from left to right is 115 psi in all three
2. New BPRE8s gapped at .028"
3. New Non Ethanol Premium, 3/4 tank full, new fuel filter and lines, filter arrow pointing correctly
4. Pickup line inspected, clunk cleaned. Can blow in the fuel line at the fuel shutoff and get bubbles in the tank. Can also take the same line, hold it lower than fuel level and get a steady stream
5. Fuel pump rebuilt with new gaskets. Matched gaskets to metal parts of the fuel pump plus I labeled all lines prior to removal. No junk in fuel pump
6. New pulse line. Wadded up some string and put it in the pulse line. Pulled sled over and it blows the string out
7. Carbs synced with drill bit method
8. New choke plungers, springs and choke cable. Have right in between 1/8" to 1/4" freeplay at lever
9. Carbs have been rebuilt. I've tried book recommended 200 mains and what the sled had in it when I bought it (160s) Needles set in 3rd clip and what it had in it originally, 2nd clip
10. Carb floats float, new float bowl needles (viton tip) and seats, when held upside down the float plate is square with the carb body
11. Bright blue spark
12. New coils, wires and plug caps - all pass the book specs
13. Cylinder drain plugs in front of block removed, no buildup, replaced them. They have the little aluminum washer on them

Now here's the weird part. I can pull until I'm blue in the face, with max choke and nothing. I pull the plugs and they don't even smell like gas. Nothing smells like gas. I can put about 1/2 tsp of premix in each cylinder, pull and it fires right up and idles beautifully, right on the money at 1800 rpm. Until it dies, which is about 45 seconds. Why isn't gas getting to the cylinders? The bowls are full. I can pull the fuel water separator hose on the float bowl and drain it. They've got gas in them! What the hell am I missing? Thanks in advance for ANY ideas anyone has.
 

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Discussion Starter #2
Got it! Choke plungers were way out of adjustment. Using an 1/8" brass rod inserted in the choke enrichener port in the carb throat to adjust the plungers makes it super easy. Thanks to Jack on Vintage Snowmobiles! And Brokenleg for pointing me in the right direction. Now for jetting and carb adjustments.
 
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