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WD Sputters and Pops

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Gordon McCarty

06-14-1999 05:37:56




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I realize this is probably a basic question, but I'm struggling with it. My '49 WD doesn't want to run right. First the ignition was a problem. After replacing the plugs, wires and distributor cap it now has good spark and ran well for a while. Now it's sputtering with, I believe, some kind of fuel problem. How do you adjust the carb for fuel mixture? I've cleaned the carb, checked for adequate fuel flow and adjusted the power needle (starting at 1-3/8 turns open). No matter which way I adjust the power needle, it still sputters and pops at any throttle above idle. However, it does idle nicely.

Also, where is the inspection hole for viewing the timing mark? The only thing I can find is the clutch inspection opening. I thought this might be a timing problem, but can't find the timing mark. Does anyone have any other ideas for me?

Sorry for getting long on this post, but I want to provide as much information as possible. This is my first year trying to cut my own Alfalfa field and certainly don't want to ask to use either my neighbor's or father-in-law's green tractors.

Thanks!

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Gordon McCarty

06-18-1999 11:07:04




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 Re: WD Sputters and Pops in reply to Gordon McCarty, 06-14-1999 05:37:56  
Thanks for all the responses.

The fix, after checking a lot of other things, seems to have been to replace the condensor. The points and condensor had been replaced late last year, and the points still looked fine. I replaced it now pretty much since I couldn't think of what else to do. Now the tractor idles nice and runs well at high throttle.



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Tim(ny)

06-21-1999 07:01:37




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 Re: Re: WD Sputters and Pops in reply to Gordon McCarty, 06-18-1999 11:07:04  
Gordon, thanks for letting us know the outcome. I'll try a spare condenser in my WD before rebuilding the carb and doing a complete tuneup. I just had my D-17 quit, which turned out to be a rotor that looked perfectly good.



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William Powell

06-17-1999 12:51:00




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 Re: WD Sputters and Pops in reply to Gordon McCarty, 06-14-1999 05:37:56  
Wow, time to eliminate the variables. I would start by making sure you have good gas. We have an
8n that sputtered, turned out to be water in the carb bowl. Is is puffing out black smoke? If so that would indicate that it's running too rich and you should tighten the main jet. Are the points opening? You may want to consider rebuilding the carburator. If it ran well after replacing the plugs and now it does not you probably fowled the plugs. Pull them out, if they
are covered with black carbon you are running rich. Good luck

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Tim(ny)

06-14-1999 06:35:48




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 Re: WD Sputters and Pops in reply to Gordon McCarty, 06-14-1999 05:37:56  
Gordon,

I seem to have the same problems with my '49 WD. I sent it out to be rebuilt because of low compression, and now it has the same symptoms you describe. It starts like its too rich, idles ok, then sputters at higher RPM, except under load. When its really pulling it runs smooth, but when its loafing it sputters. I haven't had time to do much with it, but when I do, I plan to do pretty much what you already have done, rebuild the carb and tune up. I think my float valve is leaking because it leaks fuel from the carb when it sits, and that might explain the starting problems. I had a bad plug wire on my D-17 that caused a similar sputtering. I'm afraid I'm not much help for you, but I'll keep your email address and let you know what I find. Maybe you can do the same. I tried to find the timing mark on my D-17 the other day and had the same problem as you, so I timed it by ear at high rpm.

Tim

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Dan

06-14-1999 20:28:55




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 Re: Re: WD Sputters and Pops in reply to Tim(ny), 06-14-1999 06:35:48  

The timing mark is on the fly wheel, but you have to move the inspection plate on the bell housing. If it's a mag. then make sure it has enough spark. It could be weak.



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