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Carburetor

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Merv

09-15-2006 16:41:03

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I am back with another question.
I have a 1937 McCormick Deering T20.
I am having problems getting it to start. I just recently replaced the intake exhaust manifold with a new aftermarket manifold.
The engine will fire, as long as I prime it. But will only run for a few seconds. I have fuel in the carburetor. I know this because it runs out the bottom. So that indicates my carburetor is messed up. Is that correct? I am assuming I need to rebuild my carburetor. My local international dealer is not very helpful in getting parts. Any suggestions on my starting problem, and where to get rebuild kits. The carburetor, I have is a Zenith K5.
Can anyone help me?

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bob farrell

09-20-2006 08:09:45

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Re: Carburetor in reply to Merv, 09-15-2006 16:41:03

Whoa!! Let"s not start to fix a bunch of things that are not broke. Let"s review the facts. I assume the engine was running before you replaced the intake/exhaust. If so, Then all those things (timing, valve clearance, etc., etc., et.) are OK, or close enough to run. Gas at the Carb, fires with external fuel input (but quits as soon as this external fuel is consumed). Now what has changed since it was running?? We changed the manifold. Sounds to me like you may have air leaking into the manifold instead of going through the carb where it is susposed to. My suggestion is hook up to the pickup with a chain run through a pipe (15-20 feet long), get your wife to drive the pickup (if she is still talking to you after the rag deal), tell her to take the slack out then proceed no faster than 5MPH, for a straight run of up to 1/2 mile. Get in the seat with the switch on, transmission in high/high, and throttle 3/4 open. When she gets to rolling about two MPH, pop the clutch. The engine will start to turn over at a mid-RPM and clean out the intake system (best to have the air cleaner off). After pulling for a few yards the engine will probably start (be ready to push the clutch in so you don"t try to run over moma). Probably won"t run smooth, may even pop and backfire. At any rate if she fires let her run (even erratically) until shes warms up real good. Some things DO fix themselves (most don"t). As for the carb leaking, the float may be too HIGH. Good luck!!!!!

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russ hamm

09-20-2006 16:03:55

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Re: Carburetor in reply to bob farrell, 09-20-2006 08:09:45

if a person doesn't have the time to do it right, then when can you do it over? pull starting a crawler might take more than a pickup. at least going through these things can save a person some time on the crank someday. and at the show later is no time to check out all this stuff just because it started when we loaded it. it sounded to me that he already went through the stuff we suggested, but after several questions. just tried to help, but i guess put a chain on it and i'll keep my comments off before somebody checks out too many things.

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merv.

09-20-2006 18:35:03

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Re: Carburetor in reply to russ hamm, 09-20-2006 16:03:55

Russ.. don't stop with the suggestions.
I went through everything that we talked about.
The plug wires and spark plugs did help.
The tractor fired up, on the first crank. But ran out of primer fuel. I removed the carburetor and took it apart, the brass float has a big hole in it. And there were no gaskets in the carburetor. Someone just used some sort of gasket sealer. I found a kit for my carburetor through international dealer. Your suggestions and comments are greatly appreciated. If all else fails, I will definitely try to pull started. I do believe once the carburetors repaired, and now that everything is set correctly. I will have no problem starting the tractor. I will keep you updated.

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russ hamm

09-21-2006 05:18:51

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Re: Carburetor in reply to merv., 09-20-2006 18:35:03

that's great merv. like you said earlier, cranking ain't no fun. good luck.

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Merv

09-20-2006 16:03:03

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Re: Carburetor in reply to bob farrell, 09-20-2006 08:09:45

Thank you for the info Bob.
I will give it a try this weekend. There was only one problem with your suggestion.
That is, my wife. Your suggestion is, I have her drive my number one possession. My new Dodge truck. At the same time, she has my number to possession tied to the bumper. My tractor.
I'm not that brave. She still mad at me over the grease rags. I will get somebody else to help me.
Thanks again for the suggestion. I think it will work.
By the way, I have a new carburetor kit coming. It should be here Friday.
And the tractor was running prior to the new manifold. Was having problems with the carburetor. At that time.
We'll keep you updated.

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Nebraska Cowman

09-15-2006 17:32:50

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Re: Carburetor in reply to Merv, 09-15-2006 16:41:03

Probably just needs a good cleaning. You can cut your own gasket. I like to use the carb cleaner in a spay can to check my work. There are no dead-end passages. If you squirt cleaner in a hole it better come out somewhere.

Gold for the mistress,
Silver for the maid.
Copper for the craftsman,
Cunning in his trade.
"Good" said the Baron sitting in his hall,
"But iron- cold iron - is the master of them all."

-Rudyard Kipling

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merv

09-15-2006 17:42:16

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Re: Carburetor in reply to Nebraska Cowman, 09-15-2006 17:32:50

Cowman, I'm an electrician. And I do know that if you keep sticking knives and other metal objects into electrical outlets. You could end up curling your hair. Or, in extreme cases, you will no longer be around to answer questions.
Keep tinkering it keeps you young.
And thanks for the information. I will work on the problem is weekend. Or go Fishing.
Keep the information coming. I can process it and learn from it and hopefully get my tractor going again.

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merv

09-15-2006 16:55:36

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Re: Carburetor in reply to Merv, 09-15-2006 16:41:03

Yes I have choked it. This is an old crank model. And after hand cranking, I want to choke more than the carburetor. I have cleaned out the carburetor completely. Fuel continues to drip. The bottom of the carburetor and air intake.

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russ hamm

09-15-2006 17:02:09

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Re: Carburetor in reply to merv, 09-15-2006 16:55:36

sorry, but we have to ask about all of the obvious. i have worked on these old internationals for a long time and sometimes i don't get it all checked. was this tractor running for you or have you just bought it or did you do a valve job? the mag can show soark and if you are using champion plugs, they might let you down. there is a passage going straight up and down in the carb behind the main fuel needle. also is the float set high enough as you can have gas in the bowl but it will not carry if it's too low.

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merv

09-15-2006 17:07:58

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Re: Carburetor in reply to russ hamm, 09-15-2006 17:02:09

Yes I am using Champion spark plugs.
The plug wires are very old.
I am about to replace them tomorrow, but the only thing I can get is steel wire, not copper.
I understand copper wires are the best. Will the stainless steel work?

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russ hamm

09-15-2006 17:13:14

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Re: Carburetor in reply to merv, 09-15-2006 17:07:58

stainless wires will work. i hate to make you go buy plugs, but maybe somebody could help out there. i have had nothing but trouble in the past with the newer champions. we have so many old plugs around here that we can easily change to check before buying. i have also had champions that spark good out of the engine, but had a major difference when i changed to ac or autolite, so check it out.

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merv

09-15-2006 17:17:03

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Re: Carburetor in reply to russ hamm, 09-15-2006 17:13:14

I'm going to replace the spark plugs. I'm going to check with Napa to see if they have a replacement plugged. That is not champion. What is your best suggestion on spark plug types, and proper plug for this model

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russ hamm

09-16-2006 04:58:55

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Re: Carburetor in reply to merv, 09-15-2006 17:17:03

ac or autolite will do.

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merv

09-16-2006 09:09:30

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Re: Carburetor in reply to russ hamm, 09-16-2006 04:58:55

thanks. I will let you know things go.

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russ hamm

09-15-2006 16:48:58

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Re: Carburetor in reply to Merv, 09-15-2006 16:41:03

merv, this may sound dumb but are you choking it and if so does gas come out of the bottom after you crank it? have you cleaned the carb passages really well? have you checked valve adjustment and timing?

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merv

09-15-2006 17:02:36

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Re: Carburetor in reply to russ hamm, 09-15-2006 16:48:58

The timing is correct. And the valve adjustment is correct. The tractor was running, and before I replaced the intake/exhaust manifold, I was trying to adjust the carburetor. And it just started running rough then quit. I have reset all the jets and needles to 1 1/2 and 2 this is in accordance to the book I have.

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russ hamm

09-15-2006 17:07:33

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Re: Carburetor in reply to merv, 09-15-2006 17:02:36

merv, check the governor rod connection to the carb. see if it is hooked up right. i have had them where i either had it wide open or closed all the time when it wasn't lined up right. might be throttle closed and dying. no rags in the head ports?

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merv

09-15-2006 17:10:39

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Re: Carburetor in reply to russ hamm, 09-15-2006 17:07:33

And yes, the governor is lined up correctly. And no, there are no rags in the ports. They ended up in my back pocket, then somehow got in the laundry. Wife wanted to kill me.

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Wardner

09-15-2006 17:28:00

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Re: Carburetor in reply to merv, 09-15-2006 17:10:39

Although I am not an expert in domestic endeavors or laundry science in particular, doesn't the washer-woman always check pockets. It could be an extra source of income. In any event, I say she is to blame for the greasy rag.

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merv

09-15-2006 17:36:35

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Re: Carburetor in reply to Wardner, 09-15-2006 17:28:00

I spend all my extra money on my tractors. Or fishing. So she knows better than to look for money in my pockets. And I agree with you. It is her fault for not look into the pockets. She may not think so, as most women always find someone else to blame. Time to go fix a drink. Tomorrow's another day.

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williamf

09-16-2006 03:34:48

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Re: Carburetor in reply to merv, 09-15-2006 17:36:35

I hope you have sense not to tell her you think it's her fault, lest tomorrow not be a new day after all.
Wm

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russ hamm

09-15-2006 17:22:23

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Re: Carburetor in reply to merv, 09-15-2006 17:10:39

man, they can really give you fits sometimes! good luck and let us know how it goes. i will think some more on it in the field.

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merv

09-15-2006 17:24:52

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Re: Carburetor in reply to russ hamm, 09-15-2006 17:22:23

thanks for the info. will let you know how things work out.

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russ hamm

09-16-2006 05:05:14

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Re: Carburetor in reply to merv, 09-15-2006 17:24:52

you know, after i thought about it awhile, did you open the throttle quite a lot and try it? i know it isn't good to start a tractor cold with the throttle opened up, but some of ours start that way easier. if the throttle isn't open a lot on 2 of ours for sure, you can crank until your blue and it won't start.

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