🚀 go-pugleaf

torsten@rnivh.rni.sub.org (Torsten Leibold) writes:
>rcb@ncsu.edu (Randy Buckland) writes:
>>I am currently having engine problems with a repaired Fox 40. The engine
>>was crashed in such a way that it destroyed the carburator and
>[...]
>>get it to run for more than about 2 seconds. If I squirt fuel into the air
>>intake, the engine will start but does not appear to draw any fuel from the
>>line and just stops after a couple seconds. The lines are clear since with
>>everything dry, I can blow into the muffler line and hear air coming out
>>in the carburator. The following are the possible causes I can decide for it.

>Air comes out in the carb ?? It seems, that something's wrong with the
>fuel supply. Are you sure that the hoses are connected to the proper
>nipples ? Did you use the crashed tank for your new model ? Did you
>check the interior connections of the tank ? The hoses could be
>damaged due to the crash ....

Sorry for the confusion. With the system DRY, I blow into the muffler tube
and hear air coming out of the carb. Haven't tried with fuel, but that 
should work also. Now for carb data, here is what the fox carb looks
like in cross section.

                        |         air intake       |
high speed ==============================                   low speed
  |||||||||||||||--------------       ------------|||||||||||||||
           ========================


Note that the upper part of the cylinder that has the high speed needle
extends farther than the lower portion. I assume this is the "spray bar".
I understand that the high speed needle simply restricts the flow rate
through this pipe. One question I have is where should the low speed needle
be at {idle, midrange, wideopen}? For example, at idle, should it almost
meet the high speed needle? The fox directions for the low speed say to
screw it in until it seats and then out 1 turn. I don't know where it should
seat. I feel the resistance increase part way in but can still turn it
by hand. When I can no longer turn it by hand, I can still turn it with a
small screwdriver almost all the way in without undue force.
--
Randy Buckland                               "It's hard to work
North Carolina State University               in a group when you're
randy_buckland@ncsu.edu (919) 515-5491        omnipotent"       -- Q