40C idle pulsing after warm up
- BradE
- 40C crawler
- Posts: 15
- Joined: Tue Apr 03, 2012 11:00 am
- Location: Northeast Kingdom of Vermont
40C idle pulsing after warm up
My "new" 40C idles a lot like my last one. After it warms up, the idle pulses, probably from 1000 down to 500 and back up; engine runs fine otherwise. I just had the carburetor rebuilt before I started using it this winter, but was doing this before. Is this common? Where should I start?
JD 40C 4 roll 1955, snow tracks and sprockets from a 350
No slam on your carb guy, but what exactly did he do as far as rebuilt. I have "rebuilt" a few rebuilt carbs over the years, and most people just soak them, put in gaskets and call it good. My guess is you have a plugged idle circuit, that is what I have found when I get the symptoms you describe.
Lavoy
Lavoy
Parts and restoration for antique and late model John Deere crawlers.
Owner and moderator www.jdcrawlers.com
Owner and moderator www.jdcrawlers.com
- BradE
- 40C crawler
- Posts: 15
- Joined: Tue Apr 03, 2012 11:00 am
- Location: Northeast Kingdom of Vermont
I bought a kit with new gaskets, orifices. My carb guy did say that none of the jets he replaced had gaskets, so he used the gaskets that came with the kit.Lavoy wrote:No slam on your carb guy, but what exactly did he do as far as rebuilt. I have "rebuilt" a few rebuilt carbs over the years, and most people just soak them, put in gaskets and call it good. My guess is you have a plugged idle circuit, that is what I have found when I get the symptoms you describe.
Lavoy
I'll take a look at it for a plugged idle circuit when winter logging is done and the ground is too soft to use it much. (Those snow cleats make a mess of the lawn!)
JD 40C 4 roll 1955, snow tracks and sprockets from a 350
Okay, I am a little stumped, none of the kits available today that I have found have jets with them, they need to be ordered individually.
Lavoy
Lavoy
Parts and restoration for antique and late model John Deere crawlers.
Owner and moderator www.jdcrawlers.com
Owner and moderator www.jdcrawlers.com
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- 1010 crawler
- Posts: 353
- Joined: Mon Apr 04, 2005 6:53 pm
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- gregjo1948
- 350 crawler
- Posts: 1000
- Joined: Mon Aug 30, 2010 5:58 am
- Location: Newark Valley,NY,USA
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