[Farmall] Carb Question

[Mike Sloane]

I can't tell you how much gas you should be consuming at 1/3 throttle, 
but I generally figure about 1 gallon per hour when working.

As far as your leak, I would say your problem is that your float valve 
is not seating properly. This could be caused by either a worn 
needle/seat or a float that has a pin hole, resulting in the float not 
rising all the way (because of gas inside the float). You can find 
instructions for determining if you have a pin hole and how to remedy 
the problem. Most folks claim that soldering the brass is the only way, 
but I have had good luck with a very small amount of two-part epoxy like 
JB Weld. The risk of soldering is that too much heat can cause the seams 
to let go, and it doesn't take much. Force your float into a container 
of very hot water - if you get bubbles from air escaping, that will tell 
you if and where the leak is. I would change out the needle and seat 
after cleaning the carburetor.

Generally speaking, the most you will find in a carb kit these days is a 
diagram of the parts and not much else. I don't buy carb kits from TSC 
because I have been disappointed in the quality of their parts in the 
past - lots of stuff from Asia. I suggest that you buy your kit from 
either Case IH or your local NAPA auto parts dealer.

My repeated suggestion to anyone who is serious about maintaining their 
IH tractor is to buy a service manual from Binder Books 
<www.binderbooks.com>. The price is reasonable, and the information is 
invaluable. I would also recommend buying the parts manual while you are 
at it. Especially in the case of carburetors, IH may have supplied more 
than one version, and the parts manual will help you identify the one on 
your tractor.

Mike

On 11/18/2011 12:37 PM, Jerry Bossard wrote:
> Hello.  I have a 1942 H and I assume has a carb problem.  Last night I ran
> the tractor at 1/3 throttle and let it run for an 1 hour and 20 minutes to
> find out how much gas it was consuming.  I have a 1 gal gas tank hooked up
> and filled the tank full.  At the end of 1 hour and 20 minutes the 1 gal
> tank was nearly empty.  Is this normal?  Also when the tractor is parked I
> find that gas is dripping from the idle needle screw and there is gas in
> the carb intake hose from the air cleaner.  I'm assuming I have a carb O
> ring issue that has not sealed properly?  Do anyone have a schematic or
> drawing of what rubber seals are suppose to go where?  I'll probably pick
> up a rebuild kit from TSC but does it have the correct instructions for the
> rubber seal placement in the kit?
>
> Thanks,
>
> Jerry
> _______________________________________________
> Farmall mailing list
> http://www.antique-tractor.com/mailman/listinfo/farmall
>