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- Newsgroups: rec.models.rc
- Path: sparky!uunet!gatech!taco!rcb
- From: rcb@ncsu.edu (Randy Buckland)
- Subject: Re: Engine problems
- Message-ID: <rcb.726160232@news.ncsu.edu>
- Sender: news@ncsu.edu (USENET News System)
- Organization: North Carolina State University
- References: <rcb.725903957@news.ncsu.edu> <2592@rnivh.rni.sub.org>
- Date: Mon, 4 Jan 1993 15:10:32 GMT
- Lines: 42
-
- 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
-