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Help with H Carburetor

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DonS

01-05-2001 16:21:53




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When trying to start my hand crank H it seems that even with the choke totally closed I am not getting fuel into the cylinders. After turning the engine over numerous times, by hand, with no results I removed the plugs to check for fuel and found the plugs bone dry. After putting a little fuel in each cylinder, through the spark plug opening, and replacing the plugs the engine will start on the second or third revolution. After starting it idles fine but seems to run rough between 1/4 to 3/4 throttle. Also I can get no reaction from the load adjust needle. I have cleaned and used the drill bits on the small passage ways, also removed and cleaned the main nozzle. Any ideas from you experts out there?

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Tim S.

01-08-2001 05:31:24




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 Re: Help with H Carburetor in reply to DonS, 01-05-2001 16:21:53  
I fought that carb trouble myself on my H. It looked so simple to be such a pain. I also had the problem of gas leaking past the 3-way valve and getting into the crankcase. I had read on this board of the cut-off on the sediment bowl, looked on mine and it was rusted stuck. Went to the dealer for a new valve and he had an entire new sediment bowl assy (with a real nice cut-off valve) for $21.50. Allright! Glad I went there first instead of junkyard or something.

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G Taylor put a G carb on it

01-06-2001 20:22:01




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 Re: Help with H Carburetor in reply to DonS, 01-05-2001 16:21:53  
Just kidding about the G carb, see old posts . Any chance there maybe an intake manifold or mating surface leak somewhere between the carb to the head? How is the compression & oil consumption? Weak vacuum on the intake stroke while cranking may contribute to the lack of fuel metering.



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Cam

01-08-2001 10:37:35




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 Re: Re: Help with H Carburetor in reply to G Taylor put a G carb on it, 01-06-2001 20:22:01  
Glen

Saw the heading on your post, and it was the best laugh I had all day.



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Durbco

01-06-2001 15:56:54




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 Re: Help with H Carburetor in reply to DonS, 01-05-2001 16:21:53  
I am in the process of rebuilding a 37B and a 46A and have cleaned both carburetors to where they now run great! In the learning process I removed and cleaned these two carbs probably a half dozen times each before I found and corrected the clogged passage(s). Amazing the difference just one small clog will make. Both my tractors sounded like your description of yours. I think I now can do a carb since I know what to look for.
Good luck.

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John T

01-06-2001 07:03:19




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 Re: Help with H Carburetor in reply to DonS, 01-05-2001 16:21:53  
Don to add maybe a bit to clooneys good advice, also be sure the throttle shaft bushings are as deep as they can go without causign interference in the the bore and are also not worn, be sure theres enough clearance where the nozzle fits up in the carb that it needs that bottom spring to hold it from falling down, and adjust the brass throttle butterfly so its even concentric dead centered in the carb bowl. I thought I was pretty Hot Stuff on general carb repair until I had to break down and send mine off to Rober Beaver who now has it finally PERFECT. Ol John T

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burns

01-07-2001 19:19:55




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 Re: Re: Help with H Carburetor in reply to John T, 01-06-2001 07:03:19  
Amen to Mr. Beaver at Robert's Carb shop. He worked wonders on my Big Nut for my G



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clooney

01-05-2001 18:31:18




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 Re: Help with H Carburetor in reply to DonS, 01-05-2001 16:21:53  
Don, you didn't say what year H? First does it have the correct DLTX-26 or DLTX-46 carb on it? Then does the choke plate have the little spring loaded trap door in it? If all "ok" there, then make sure the float level is set correctly (3/8" between float & carb body, then pull the "nozzle out & make sure all the little holes are clean in the side, then make sure the nozzle goes all the way back up in the main well with the spring under it to hold it up (check for dirt & rust in the nozzle bore). Because the load needle seems to have little effect you should pay attention to the nozzle, main well & feed port for it. Make sure the lower bowl retaining nut isn't going in so far that it restricts the fuel flow into the main well.

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