1947 Farmall H

[Mogster]

My friend just bought one with a single front tire. We are going to pick it up tonight.I owned a 1948 super A about 5 years ago, great little tractor. I think my friend will really enjoy this H. It is his first tractor. Going to pick up a piece of old iron makes for a great day.

 

[fastfarmall]

When he gets it home,he might want to check the grease, in the final drive. If it looks like what come out the back side of a cow, he can wait for a nice day, put it on a incline, and drain flush and refill. That's been my experience.

 

[Mogster]

Will do, thanks for the tip.

 

[FBH44]

Great tractor, my first was an H. 390,000 of them made, lots of parts and infinite amounts of advice available.

 

[Mogster]

We got the H home, all went well. The idol is way to high, governor and carb are not set correctly. So I told my buddy to order a manual.I like this tractor. He bought it for 2,000.00. Two new back tires.I think that he did very well.

 

[FBH44]

Well since you asked ,,,,, Here's my H carb tune-up procedure;
Make sure the float isn’t sticking or touching the insides of the float chamber. Some previous advice was to use a Dremel tool and smooth the insides of the float chamber so the float doesn’t rub or touch. Pretty important.
Set the float so the top of it rests 1 27/32" above the flat surface of the float chamber.
Initial settings are as follows to get it started;
Main fuel adjusting screw, big screw facing down at an angle, towards the rear, at the bottom of the carb; 2 1/2 to 3 turns open. This main screw turns clock-wise for leaner mixture. [This screw adjusts fuel.]
Idle air-mixture screw, smaller screw facing forwards, on upper left-hand side of carb; 1 to 1 1/2 turns open. This idle screw turns counter-clockwise for leaner. [This screw adjusts air.]
Idle speed screw, faces outboard, at the top of the carb; set for 450 rpm, and make sure the governor correctly engages in the slot. [This screw adjusts RPM’s.]
Final settings are determined as follows;
Get the engine warmed up, and idling.
Turn OUT the idle air-mixture screw until rough running, then turn in until it idles smooth. (Mine is set at 1 turn open.)
Rev it up, wide open, warmed up, then turn the main fuel adjusting screw IN until rough, then out til smooth, then 1/4 turn to 1/2 turn further out. (Mine is set at 1 turn open. Other advice has been to set it at 2 1/2 turns open for pulling implements.)
Should rev up smoothly and evenly.
Too Lean = stumble, sputter, damaged melted plugs.
Correct = tan plugs.
Too Rich = back smoke, black sooty plugs.

 

[Owen Aaland]

Sounds like good advice on how to set the carburetor.

One thing to keep in mind is the main fuel screw is used to set the maximum amount of fuel that can go through the carburetor. This happens only when the governor has the throttle plate in the fully open position. At lesser throttle settings the fuel rate will be determined but the vacuum created as the as moves past the fuel nozzle and the fuel level in the fuel bowl. The higher the fuel level the more fuel that will be drawn through the nozzle. If an engine is running too rich at moderate loads you need to lower the fuel level rather than trying to adjust the fuel screw.

 

[Mogster]

Thank you. I will be doing this next week, I wrote it down. I would not have adjusted it right without your help. Thank you agin.