It's called a needle. It closes fuel off by the float pushing it into a seat.
Thus the name I'm sure you've heard together, needle and seat. You'll have to
buy them as a pair.
The spring can drive you crazy. But before that happens, know it will work
well without the hassle of the spring clip.
What you will want to do when you get a new one is to install the seat, on that
engine it should be a round O ring looking piece kind of squared off at the
shoulders. You can install it by setting it in the opening, and use either a
round punch, or the shank end of a drill bit to push it in place. Try not to
use a hammer to set it, there is a small shoulder in the opening and you can
push right past it using a hammer.
Next, set the needle in the new seat and then run the pin through the back of
the float.
When that is done, feel across what will now be the bottom edge, normally the
top edge of the float. Make sure that edge is parallel to the body of the
carb. If it sits "low" pointed toward the float bowl, or up at you in this
case, it can starve the engine. If it sits high, pointed toward the body of
the carb, it can flood.
That's all there is to it. While you have it apart, spray some carburetor
cleaner in the area to wash out any dirt or garbage that has found it's way in.
You may also consider replacing any of the quarter inch fuel line. Often times
as they get older the insides will break down and bits of the line can lodge in
the seat area causing it to flood.
Let me know if this doesn't work.
----- Original Message -----
From: Dale Leavens
To: blindhandyman@yahoogroups.com
Sent: Friday, June 11, 2010 9:43 PM
Subject: [BlindHandyMan] Tacumseh engine carbeurator question
Good evening,
I have a wood chipper and leaf shredder powered by a horizontal four stroke
Tecumseh engine. The damn engine has given me a lot of grief over the years,
trouble starting after periods of inactivity. Oddly, this year it has behaved
fairly well. Then it began leaking fuel around the top of the sediment bowl.
The problem appears to be the little pin like valve arrangement which should
close off the fuel flow when the float raises and pushes the little beggar into
the orifice. Well I disassembled it, there is a little spring clip which I was
trying to figure out where it connects when I lost the little pin like valve
closer in the grass.
I need to know what this little bad boy is called so I can see if I can chase
down a new one.
It is a 6 or 8 sided pin about half an inch long I suppose beveled to a point
at one end and with a ring milled out very near the other end where this little
spring wire clip snaps onto it. It sits on top of the float so, when the float
is up it pushes firmly into the fuel port from the fuel tank.
Those of you with mechanical training may know what this little device is
called.
Thanks for this.
Dale leavens.
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