[AT] 430V Update

[kkinney at herculesengines.com]

Spenser
One thing I have done with success on worn needle threads is to clean the female threads real good and put a very light coat of oil on the male threads.  Then put a dab of JB Weld or similar material in/on the female threads and screw in the needle valve.  Let it harden and you should have a pretty good fitting needle valve.  Just don’t get so much in there that it is pushed further into the carb. and messes more things up.  As they say, just a dab will do you. 
Keith

> On Feb 13, 2018, at 10:10 PM, Spencer Yost <syost at triad.rr.com> wrote:
> 
> Good news on the carb rebuild.  i got a test fire today.  The rebuild eliminated my high-throttle hunt.   It also eliminated what I considered to be some excess black smoke. Obviously I can't be entirely sure as to the culprit, but I believe it to be the high-speed needle. The housing was cracked and the packing was shot.   Based on the smoke I think it could gulp air causing the hunt, but otherwise run rich.
> 
> However my inability to accurately and consistently adjust the throttle mixture remains.  That's when I noticed I still have free play in the throttle adjusting needle(I can wiggle it), even with a new needle and spring. Apparently the threads in the carb are worn.   It isn't especially problematic, as I can get it sort of close. But I still am not happy with it. Also the reverse mounting used on these John Deere's 430 carburetors causes the idle speed adjustment screw to land on a boss on the carb it is not intended to.  That idle speed screw tends to be real touchy because of this. Less than 1/8 of a turn and your running 1500 RPM instead of the spec.
> 
> But boy it sure is nice to listen to that thing lug under full throttle. It sounds real sweet now.   I have a touch of a high speed ignition miss right now.    But I think that is timing.   Previously, because I could not get it to run consistently at high-speed I could not time it. These tractors, as I think Cecil reminded me,  earlier, are timed under full  rpm.
> 
> So still some tinkering. But right now it is running much better - even to the point the causal observer would think its running great.
> 
> Next:  I have the rotted seat back off, and will be reupholstering it. I think I can use the original material.  I am also going to have to swap out the  rear rim that is rusted. I found a great  original and correct rim last summer. I just need to get it down to the tire shop to swap it.   Amazingly it leaks air very slowly. So it was a low priority.
> 
> Spencer Yost
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