I have two C35's and they're both one or two flips. The hole in the spray bar should be oriented perpendicular to the venturi on them (i.e. aiming towards the front of the engine).

An engine that's been stored full of oil will load the plug with gunk pretty quick. Unless its packed in like cosmoline, letting some raw fuel sit in it for a few minutes while shaking it around should free up it up. My Enya .29 sat for a long time and I didn't have to take it apart to get it running again.

If your tanks are old and used, a fuel filter is a must. You might fill'em full of acetone or MEK, plug all the vents, and let'em sit for a day or two shaking every once in a while then blow the stuff out the feed line under pressure with a fuel bulb. A couple of treatments like that and most of the solvent soluble junk gunk should be dissolved and ejected.

There might be some water soluble gunk like solder flux residues left too. Some nice soapy dishwater shaken around for a while can get that. Keep flushing with clear water under fuel bulb pressure until you don't see anymore suds coming out. The dregs of the flush water are soluble in alcohol. Some rubbing alcohol will absorb the water and get that. Then a dash of fuel shaken around will pick up that flush alcohol and carry it out too.

Another thing I've seen that could cause a problem was a pickup line with a hairline crack running the length of it that was bleeding air in. That only happened to me once but it was a real puzzler for a while.