H idle

New to me H hadn't run in several years, but previous owner fiddled with it enough to get it to start but was rough runner. I took carb off and cleaned it up after reading instructions on the forum. I also used the settings that everyone posts on here.
I can get it to run and it purrs, but I don't think it is "right". It won't start when I'm cranking but fires up after letting go of the starter. It stumbles for a second and then starts to run fine.
Also, the lowest idle speed that it will keep running is when the throttle lever is 1/2 open. The engine sounds like it is turning RPMs that normally would be at low idle.
Are these just carb adjustments that need to be made to fix this? If so, what are they? Is there something else?

Starting after you let go of the button sounds like a low voltage or no voltage to coil while cranking issue.

Sounds like it may have a 12 volt conversion that was done incorrectly. They probably did not include a wire that supplies full voltage to the coil while the starter is engaged, and then, when the tractor starts, all voltage is directed through the ballast resistor to supply only 6 volts to the coil.

Have your starter checked out,starter is probally pulling current away from your distributer,if it has a mag disreguard

jimmy

Your problem could be in the dist when the bushings get bad engine wont idle very good as the fire is intermitten. You can check that with a tming lite going from wire to another and watching for constant flashes also have you checked the tappets.

As Rusty suggests the starting issue is probably an incorrectly wired 12 volt conversion. Or if your H is still 6 volt its got a weak coil or worn/incorrectly set points.

The idle problem is the carb idle stop screw set too low AND the governor-to-carb linkage out of adjustment.

Concerning your idle speed, there are a couple of places to look. One is on the carb and it is a screw that adjusts to physically stop the throttle. It prevents the carb from being totally closed with the throttle. If that doesn't change the idle speed then look inside the governor. There are high and low speed screws in there you can adjust. You also want to make sure the linkage isn't binding somewhere.

(quoted from post at 15:15:37 08/13/14) New to me H hadn't run in several years, but previous owner fiddled with it enough to get it to start but was rough runner. I took carb off and cleaned it up after reading instructions on the forum. I also used the settings that everyone posts on here.
I can get it to run and it purrs, but I don't think it is "right". It won't start when I'm cranking but fires up after letting go of the starter. It stumbles for a second and then starts to run fine.
Also, the lowest idle speed that it will keep running is when the throttle lever is 1/2 open. The engine sounds like it is turning RPMs that normally would be at low idle.
Are these just carb adjustments that need to be made to fix this? If so, what are they? Is there something else?

Click to expand...

do you have a link to the carb settings that everyone posts on here, i need to adjust the carb on my H, among other things, and really have no idea where to start.

thanks

Thanks to all for the places to start. Once I get back out to the farm, I'll see what I can do.
As for the carb adjustments, i searched "h carb" and found something similar in a couple places.

First off, this was posted by FBH44 and I am in no way claiming that it is my own.
As it was on here a couple times and no one wrote back in to say that it is wrong, I took it as it was a correct way to adjust.

Posted: Sat May 10, 2014 8:13 am Post subject: Re: H dies when throttling up

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You might not need this, but it might help. My "H" carb adjusting 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.