First time mods on my 318 and it won't start...

nm9stheham said

Try the following simple test: Pump the throttle to the floor 2x and then crank; as soon as it fires, try pumping the accelerator about 1/4 to the floor every 1 second or so; that will pump added gas into the carb via the accelerator pump (which is what you saw squirting gas in to the carb throat), and simulate the choke action in that way. If the lack of choke is the problem, then this will probably, keep it running 'til it warms up; if you get your technique right.

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Just annoyed my neighbors with yadayadayadayadayadayadayadayadayada-wrooom sounds on a light Sunday evening. :) Your test worked; well, partially. It works somewhat while I more or less constantly pump a little bit on the gas. The engine isn't really idling or in a state that it could actually warm up; the whole thing is very erratic - my pumping certainly doesen't help.
I took the carb off after this - the manifold/carb gasket was already soaked with gas (by the way: does this gasket have to bee RTV'ed or not? I somewhere read not to but am not sure...).

@stixx: iiu, gmacht! :)

Well, to sum it up, I'm going to have to figure out how this carb should be assembled in the first place. Will go picture hunting now...

A big thank you to all of you - it is great to have people willing to share their knowledge available (and so quickly - I'm still amazed)!

Timo