[AJD] More JD 40 Carb and other stuff

[Duane Larson]

LeRoy,
The seat is 3/8 - 27 (yes, it is an odd size, NOT 1/8 - 27).  I checked
several different TSX seats and they are all 3/8 - 27.  That tap will not be
available at a normal hardware store.  Somehow your old seat was replaced
with a 3/8 - 24 seat from somewhere - seems like some IH carbs use that seat
thread.  Looking at the threads in your carb where the seat goes - do they
look as if they have been overthreaded?  I checked a TSX688 which uses the
same seat as yours, and the seat in it was 3/8 - 27, as expected.

The length of the piece of the float which floats should be 1 3/4" long.
The more common TSX float has a 1 1/2" body length.  The overall length of
both floats is about 2 1/2".

Duane

----- Original Message ----- 
From: "Duane Larson" <jdlarson at comcast.net>
To: "Antique John Deere mailing list"
<antique-johndeere at lists.antique-tractor.com>
Sent: Tuesday, September 14, 2004 8:50 AM
Subject: Re: [AJD] More JD 40 Carb and other stuff


> LeRoy,
> I'm beginning to think you have the wrong kit.  If it is a TISCO kit, the
> box should say BK39V, or if it is a Zenith kit, it should be K7515.  I
will
> measure my seats this morning and see what sizes/threads they are.  It
> sounds like you also have the float for smaller TSX carbs.  I will try to
> check the difference and give you a measurement.
>
> I rebuild TSX530 carbs regularly and have no problem with the BK39V kits.
I
> haven't bought any for a year or so (I buy several when I get them), and
it
> is possible they have messed something up with the recent buyouts of
TISCO.
> Regards,
> Duane
>
> ----- Original Message ----- 
> From: "LeRoy Price" <lep at epix.net>
> To: <antique-johndeere at lists.antique-tractor.com>
> Sent: Sunday, September 12, 2004 7:15 PM
> Subject: [AJD] More JD 40 Carb and other stuff
>
>
> >
> > Everyone may recall that I was having an issue with the seat in 2 carb
> kits so today I stopped for a tap to clean out the carb hole that the seat
> is placed.  For kicks I stopped by the fine thread nuts and picked out a
3/8
> X 24. I tried it on the old seat and it screwed on without issue.  I then
> tried it on the new kit seat and I couldn't get it an 1/8 on, just
wouldn't
> go.  To me its the seat, something is wrong with it.  Bought the tap
anyway
> and it didn't make a difference.
> >
> > I fooled around with the new float.  What I found is that the arms are a
> bit shorter than the original hence I don't have much adjustment since the
> bending the float down will start them rubbing on the inner sides.  I did
> notice that the fuel bowl was loose and I tighten that.  Is there a good
> replacement for the float?
> >
> > Next, when I run the JD 40 its not to reactive to the throttle.  By that
I
> mean if I start it out with a little gas it pops along.  If I give it more
> throttle it runs faster but when I decrease the throttle it doesn't
respond,
> stays running like it wsa at the previous position.  What do I look at?
> >
> > LeRoy
> >
> > Incompetence: When you earnestly believe you can compensate for lack of
> skill by doubling your efforts, there's no end to what you can't do.
> >
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>
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