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Recent content by rick pa

Yesterday's Tractor Forums
  1. R

    Farmall A stumbling

    You were right about full throttle running on idle jet, when not under load but full throttle, the throttle plate is only slightly open. I guess my next move is to open carb again and check idle circuit, but really don't think I will find much, I have been through it many times now. It isn't...
  2. R

    Farmall A stumbling

    I wont get a chance to look at it till the weekend. It makes sense about running on idle jet till governor opens throttle for load. My Ferguson surges under load(governor or mixture not set just right) but I would say this is more of a miss than surge, but I will check throttle shaft for...
  3. R

    Farmall A stumbling

    So to recap.It idles good always,it runs good up to 1/2 throttle,above 1/2 throttle with no load it has a miss/stumble, it is more of a carb stumble than ignition miss,add some choke and the miss/stumble goes away. It runs good climbing a hill above 1/2 throttle but when you crest the hill and...
  4. R

    Farmall A stumbling

    The reason I don't think it's fuel flow issue is the stumble/miss happens as soon as I throttle up over 1/2 throttle,not gradual like a starvation issue. With the idle mixture screw turned 1/4 turn out,it doesn't stumble/miss,but has lean hesitation when throttled up.I think main jet is fixed...
  5. R

    Farmall A stumbling

    Thanks for the replies,the screen in the fuel bowl and fuel inlet elbow appear to be long gone, inside of tank is clean, there is an inline filter, but when I removed the main jet plug/cover, gas flowed well out of carb. It has a zenith carb. It seems like a lean condition on main jet. I will...
  6. R

    Farmall A stumbling

    Hello,I am back to working on the clubs Farmall A.It idles nice and runs good when under load,but when it is above 1/2 throttle without load it stumbles,unless some choke is applied. I replaced points,condenser,cap,rotor,plugs and wires (magneto) checked rotor timing gears,but not governor end...
  7. R

    Farmall A running lean

    It is non adjustable, is the cover you refer to a plug? The main jet is behind the plug I removed to check flow. Thanks
  8. R

    Farmall A running lean

    I forgot to mention, there is no screen in the elbow,I pulled the fuel line and had good flow,pulled the plug from carb and had good flow. At one point it wouldn't stay running so I cleaned the carb, but there may be something blocking still, I may need to pull off carb and go through again. Thanks
  9. R

    Farmall A running lean

    I am having trouble getting a Farmall A to run smoothly, It runs good with choke part way on but runs rough when choke is off.I have been through the carb several times, blew carb cleaner and air through all passages to be sure they are open. I held my hand over intake manifold to check for...
  10. R

    Farmall A engine knock

    Today since the engine is this far open, we checked rod bearings, at some point dirt wore a groove in bearing but everything looked good and crank measured good,and still standard, so I will put in new bearings and close it up again. thanks for all the help.
  11. R

    Farmall A engine knock

    If it were mine, I would have done more, but it belongs to an archery club so I didn't want to chance anything. Mine is a 50 ferguson TO 20. thanks for all the responses
  12. R

    Farmall A engine knock

    So today I pulled the carb loose, and one of the choke butterfly screws is missing, shiny metal where screw should be. Ended up pulling head off but can't see screw or marks from screw going through. Might need to look in intake ports better.
  13. R

    Farmall A engine knock

    Thanks for the response, The knock is present when clutch is in,or out. I was thinking it could be something at the front of engine,I removed belts to eliminate noise from alternator and fan hub, but will still knock.I was also thinking about timing gears or governor/magneto. The knock seems to...
  14. R

    Farmall A engine knock

    Hello, I am working on an A that has run great for years,the other day I started it and let it warm up a few minutes, I started driving and noticed a miss in the engine with a very concerning knock. The knock sounded like it was coming from the upper part of the engine. Later in the day I pulled...
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