Carb stumper

[Tarytoons]

I'm totally buffaloed here...
I've rebuilt the carb on my '48 Cub and I can't get it to quit leaking gas.
I've checked and rechecked the float..even going so far as to drop it in a pot of boiling water to check for leaks. Everything checks out ok, but when I open the valve on the sediment bowl I get a nice steady stream out the choke bore.
What am I missing here??
I could sure use some of y'alls great Cub wisdom on this one.

[John *.?-!.* cub owner]

3 things to begin with. check for float dragging on side of carb. Check for carb gasket extending inot float chamber and blocking float movement. If none of thos, mount top half with float to carb and gently raise the float with your finger to see where flow is coming from.

[Don McCombs]

Did you use a thread or gasket sealant on the main jet, discharge tube and float needle cage? If not, I think that may be at least part of your problem. Did you use an IH rebuild kit or an aftermarket one? Check out Carl's Carb Fixes for other ideas. It's here under "Maintenance Tips and Techniques".

http://www.cleancomputes.com/Cub/index.html

[Tarytoons]

Thanks guys..
John, it hadn't occurred to me to check for flow from somewhere besides the needle.
Don, what sealer would you reccommend? I never thought I would need to use sealer on any of those parts.

[Don McCombs]

For the threads, I used NAPA/Permatex High Temperature Thread Sealant #765-2648. For the little round gaskets, I used Permatex Form-A-Gasket 2 Non-Hardening Sealant #80015. Both claim to be fuel/gasoline resistant. No sealant goes on the bowl gasket.

So far, no leaks.

[lloyd430]

Tarytoons-

I just ogot over the same problem

http://farmallcub.com/phpBB2/viewtopic.php?t=13763

[Tarytoons]

Lloyd430,
Thanks. I saw that a few days ago, and that was the first thing I looked at...after a subtle application of fine grint sandpaper in a couple choice spots the float is freely moving.
Apparently that was a least part of the problem.
Sadly, there is still something not right. I'm hoping it's a lack of sealer in the right places.

[lloyd430]

I my self had put 2 kits in with no good luck.... I sent it to a fellow member and he puta IH kit in---they cost twice as much put it had more seals than the ordinary kits, the kit with the tweeking of the float did it... Because Al. is so soft I don't really see how they could crack- it it did it would be very visiable--- if you think it is cracked tho try wire wheeling the out side to clean it, the dirt would stay in the crack if there was any.. Also did you try using Merlin's advice and sticking a knife in the barrel part of the brass hinge to open it up a little on the pin....that worked good too... I actually used a file to "sand" down the float and the casting, a small jewlers file.

[Tarytoons]

I'll try that with the jeweler's file and the knife to open the barrel....
that and the sealer will hopefully do the trick.

[Tarytoons]

It was so simple I overlooked the obvious....
The float was misadjusted. It was adjusted too high so the needle wasn't closing all the way. Re-adjusted and now it works beautifully...I think.
Tried to start it and the starter grunted once and quit. &#$%$@#!!!!!
Oh well, that's why I have the battery charger.