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Still problem with LA.

4

46chief1

New User
Hey guys I posted a message yesterday about a problem I am having with a LA I have recently restored and I promptly got three replys. The engin surges and will not run smooth. One of the replys of coarse was the card. I took it off today and took it apart cleaning every peice of it . I blew a 80 lb. air hose through every port in it and air flowed through everything ok.. I put it back together and on the tractor and started it . It still surges so I retarded the time and then advanced the time and neither helped. It still surges and strugles. I am not new to this stuff but with this one I am lost. HELP.
 
Does choking it hurt or help?? If it helps good chance you still have blocked passageways in the carb air alone is not enough to clean out a carb you need spray carb cleaner and a small piece of wire or as I use a torch tip cleaner tool to poke out the passageway's
 
You could also not have your air mix and or main jets not set correctly either. Last thing I recommend a lot of times is drain the tank and put a couple of gallons of Hi-Test gas in this toy . Really, it works wonders with todays garbage gas.
 
Choking seems to help. I have a torch tip and I will try that next but it might have to wait until tomorrow. Wife says supper is ready.
 
Doesn't seem to matter where I sit the jet. Doesn't change anything but the thing ran great before I restored it. Acts like it doesn't like the new paint and decals
 
(quoted from post at 13:27:19 10/21/17) Does choking it hurt or help?? If it helps good chance you still have blocked passageways in the carb air alone is not enough to clean out a carb you need spray carb cleaner and a small piece of wire or as I use a torch tip cleaner tool to poke out the passageway's
Click to expand...
I've had terrible luck with the stuff they sell for carb cleaner these days. I think it's just diesel with a propellant. Brake cleaner, however, works great and leaves no residue.
 
Well then it could be a passage cloged. Ran into this with a Mc Culloch chainsaw once. The gasket that goes between the carb and the manifold. There is a little 1/8 dia. hole that was missing in the new gasket. Punched the little hole and bingo! Are you sure the needle seat isn't "f" up?. Is there slop in the linkage between the govenor and the carb butterfly valve? That will also wreck your day. That is why Briggs engines have that little spring on the rod going to the butterfly. Any slop at all and they go Squirrely. Have seen this so many times with portable generators. Those thing are ment to run full tilt at 3600 rpm. They work Perfectly when you pour in Hi-Test gas. With regular they keep hunting. Really, see if it helps.
 

I would really like to know how you can tell that air is flowing through all of the ports--passages. Working with 80 lbs you would need some kind of tiny needle tip that would seal to the inlet outlet of the passage. How can you do that?
 
One more thing. Use brake cleaner and that little extension tube. Blow it down every single passage with the needle vaves removed. All of those passages have liqid gas in them, no air. Look Carefully at the input side of the venture just in front of the throttle plate. You should see one, two, or three little tiny holes. Make sure you stick that extension tube right up against those holes and squish your finger over top of it. Then blast it with the cleaner and you should get juice squirting out some where else from a passage. Had one of those little holes plugged on a CUB Cadet carb. Took me three tries before I finnaly got it unplugged. Hate this crap gasoline anymore!
 
Well Showcrop I did not mean to say that all 80 lbs. was going through those little ports but I do have a small rubber end on my gun that I can sit right over them . And OLD I tried the torch pins and manageg to get them through all ports as far as I can tell. Now they are soaking in brake cleaner.
 
Did you paint the governor springs and linkage maybe,if you painted the motor?... If so...Lacquer thinner or brake cleaner should take the paint back off,be careful,not to get those solvents in your eyes.

Keith
 
Well OLD I have to tell ya. I let the thing soak in brake cleaner while I ate supper. I went back and ran the little torch tip wires through everything. The two very small ones at the butterfly were hard at first but they got better. I put it back on and that took care of the problem. Runs great but know the new paper pully outfit makes a clanking noise when she runs. I know they are supposed to be shimed but I am not exactly sure how. Anyway thanks and thanks to all you guys.
 
Kevin! I doubt they have changed the formula much, because it still makes me blind, and burns like heck, when I get it in my eyes! I have never learned to put on safety glasses before using it. ( oh it wont be needed this time)
 
(quoted from post at 18:04:13 10/21/17) Kevin! I doubt they have changed the formula much, because it still makes me blind, and burns like heck, when I get it in my eyes! I have never learned to put on safety glasses before using it. ( oh it wont be needed this time)
Click to expand...
ot a problem for me, I've been wearing Coke bottles since I was 4. Can't use plastic lenses, though, for that reason. Maybe it's only a couple brands that act like that & I hit the lottery, but brake cleaner always works for me. Glad we got this one sorted, yeah, if those idle enrichment passages are plugged it can cause all sorts of problems.
 
I do not remember what tractor you have. Both John Deere and Case made a LA so is it Deere or Case? I think those 2 are the only ones to use the model LA? And I think of Deere first with that model.
 
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