Welcome! Please use the navigational links to explore our website.
PartsASAP LogoCompany Logo (800) 853-2651

Shop Now

   Allis Chalmers Case Farmall IH Ford 8N,9N,2N Ford
   Ferguson John Deere Massey Ferguson Minn. Moline Oliver

Attention Forum Users: On the 28th of December 2023 at 9:00am Central Time, we will be taking the forums down for maintenance while we prepare the new forums for your use. Please click here for more information.

Discussion Forum
:

70D: Another pony Carburetor question

Welcome Guest, Log in or Register
Author 
F-I-T

04-16-2003 06:22:38




Report to Moderator

I have my pony starting and running well now. Thanks to all. It seems it was a combination of really bad spark plugs, and that I was richening it up over time to sort of compensate.

After I had it good and warmed up, I was able to lean out the idle and load needles a lot.

Here's my question. Mornings here in Florida are not what you'd call cold, but it was pretty cool this morning. The pony starts well, but it really likes it's choke until it gets warm. I don't want to rich it up to make it less choke dependent, for fear that it will flood on a hot start. Are all the ponies pretty choke dependent ? If it continues to run the way it does now, I'd be quite happy, but on a cold start, you couldn't let it to warm itself up without sitting on the seat to baby it. Once warm, you could start it and let it run through a whole tank.

Thanks for any thoughts.

Frank-in-Tallahassee
70D // 855

[Log in to Reply]   [No Email]
HAL

04-16-2003 13:51:16




Report to Moderator
 Re: 70D: Another pony Carburetor question in reply to F-I-T, 04-16-2003 06:22:38  
Frank have you had the card rebuilt? On my 70 I had to use the choke alot then I rebuilt the carb I live in Michigan and used it to plow snow all winter all I did was get it started and walked away for 15 to 20 minutes to let it warm up and never touched the choke again. LOL



[Log in to Reply]  [No Email]
F-I-T

04-16-2003 15:21:20




Report to Moderator
 Re: Re: 70D: Another pony Carburetor question in reply to HAL, 04-16-2003 13:51:16  
Hal:

Well, I kitted the carb myself, including a new float. That might not make it right, though LOL !!! It has new rings and valve job, and seems to be mechanically right.

30 years ago it was always cold-blooded, too. It would start at -20F, but you had to stay on it and baby it until warm. When the main engine was warm it would start and run pretty well, but since it was warm there didn't seem much reason to run it very long. I will say that back then we probably did not always warm it long enough.

I can make it less choke dependent, but then it will probably be rich on warm starts. I don't want it to load up and get the plugs all carbon fouled again.

Frank

[Log in to Reply]  [No Email]
Ty

04-16-2003 12:22:39




Report to Moderator
 Re: 70D: Another pony Carburetor question in reply to F-I-T, 04-16-2003 06:22:38  
When it is in the 40's I usually only choke it for a minute. Start on full choke, when starts slide over 1/4", hold for 30sec. slide over more hold until no choke usually another 30 to 45 seconds and then I don't have to worry about it and let it warm up.



[Log in to Reply]  [No Email]
Duane(Pa)

04-16-2003 11:56:17




Report to Moderator
 Re: 70D: Another pony Carburetor question in reply to F-I-T, 04-16-2003 06:22:38  
I set mine up much the way Clooney set his. The low idle is set for me, not by the book. (slower) I also have to modulate the choke when it's really cold. I was looking to keep it as lean as possible at idle to keep it from loading up at the reduced idle speed. When below 30 I have to "stay with it" to keep it running but I'm willing to do that to get better fuel mileage and keep it from loading up and fouling plugs. I set my load needle motoring the diesel on decompression. That setting seems to carry over fine to full compression cranking. Aint theese things a work of art?

[Log in to Reply]  [No Email]
G Taylor........forgot to ask about timing

04-16-2003 08:04:39




Report to Moderator
 Re: 70D: Another pony Carburetor question in reply to F-I-T, 04-16-2003 06:22:38  
Clooney,I'm 100+ miles from the tractors and can't tell just by looking at the manual. How did you dial in a little advance for the starting ignition?



[Log in to Reply]  [No Email]
Clooney

04-16-2003 08:44:11




Report to Moderator
 Re: Re: 70D: Another pony Carburetor question in reply to G Taylor........forgot to ask about timing, 04-16-2003 08:04:39  
Glen, the whole pony distributor can be rotated by loosening the retaining bolts & turning it. The > mark on the flywheel ring gear matches a similar < mark on the case. ~I don't advance the timing on my ponies. I'd be afraid to toast those fragile little aluminum pistons. I did mention that I had one that was advanced & I set it back to book specs of the >< marks lining up just as the #1 points open. ~There is only one catch to using the timing marks on a pony? That assumes the ring gear hasn't been moved or hasn't slipped.

[Log in to Reply]  [No Email]
Clooney

04-16-2003 06:56:36




Report to Moderator
 Re: 70D: Another pony Carburetor question in reply to F-I-T, 04-16-2003 06:22:38  
Frank, on the ones I have owned over the years they all seem a little different. [of course the fuel volatility has also changed over the years]. ~On the 720D I have been using all winter it is pretty choke dependent. But I have the base idle set lower. It seems that as soon as that idle is lowered to what sounds like a sane base idle the engine needs more choke to get it to stay running when cold. Right now I have split the difference between a little rich idle & it staying running with no choke. ~Even when 30� outside it will start with full choke & almost no cranking, then once running I have to flip the choke back on 3 times for just a moment each time... Then a quick trip to run for about 1 second, then it will stay running on it�s own at the lower base idle... I put a new float in it last fall & the new float looks different & seems to take up more room in the float bowl so I�m not sure the book setting is correct for the new float [I�m going to raise it a little this spring when I get a chance].
~I�m also tempted to file another notch in the throttle lever dash plate so I have an intermediate idle speed close to the factory setting. [just for cold weather use].
~I also need the load screw on this 720D, & the last few I have owned set open farther than the factory spec, [maybe it�s those new floats?].
~I have been hesitant to do much with it as that little pony runs so good & has plenty of power & doesn�t even smoke.
~When I raise that float level I will let you know if that makes a difference [I think it will]..
~One other thing I have found [I�m sure you have figured the same thing out] is that the fuel tank being full makes a big difference on how that pony runs cold. As soon as that tank is almost out of fuel the fuel level in the tank is about even with the bottom of the carb bowl so there is not much incentive for the fuel to flow into the float bowl�...

[Log in to Reply]  [No Email]
G Taylor

04-16-2003 07:57:29




Report to Moderator
 Re: Re: 70D: Another pony Carburetor question in reply to Clooney, 04-16-2003 06:56:36  
It seems all three of our starting engines also have thier own prefernces of choke and throttle position to get them to start.



[Log in to Reply]  [No Email]
[Options]  [Printer Friendly]  [Posting Help]  [Return to Forum]   [Log in to Reply]

Hop to:


TRACTOR PARTS TRACTOR MANUALS
We sell tractor parts!  We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today. [ About Us ]

Home  |  Forums


Copyright © 1997-2023 Yesterday's Tractor Co.

All Rights Reserved. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. Trade Marks and Trade Names contained and used in this Website are those of others, and are used in this Website in a descriptive sense to refer to the products of others. Use of this Web site constitutes acceptance of our User Agreement and Privacy Policy

TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V.

Yesterday's Tractors - Antique Tractor Headquarters

Website Accessibility Policy