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Case Tractors Discussion Forum

Case 970 carburetor

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Keith Jones

04-05-2013 03:09:07

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My 970 has had a plug placed into the adjustment on the bottom of the carburetor where the parts book calls for a solenoid. Can anyone enlighten me as to why they had a solenoid there? Was it commonly removed and replaced with something else? I am unable to lean out the mixture when under load without some type of adjustment.

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04-05-2013 22:39:30

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 Re: Case 970 carburetor in reply to Keith Jones, 04-05-2013 03:09:07  
Keith, my 930 had the solenoid it quick working. i took out the pin and screwed it back in. it started up. if you find a shop that sells them, please let me know. i would like to replace mine. thanks john

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Keith Jones

04-06-2013 04:05:49

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 Re: Case 970 carburetor in reply to axe55, 04-05-2013 22:39:30  
I am going to check with a local shop today that rebuilds carbs for an adjustable load nozzle to replace what I have.

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j hikemper

04-05-2013 06:50:20

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 Re: Case 970 carburetor in reply to Keith Jones, 04-05-2013 03:09:07  
hi keith ,, my little deer kawasaki mower has a solenoid on the carb , to prevent run ons , dieseling and backfires ,, you could simply turn off the gas , like I do the DC s after a hard work out ,,takes about 3 minutes for the DC to finally go to sleep ... not sure if backfire s will harm the engine e ,, but I would say its hale on the muffler for sure ...

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Keith Jones

04-05-2013 19:54:46

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 Re: Case 970 carburetor in reply to j hikemper, 04-05-2013 06:50:20  
Removed the plug and found an a slotted adjustment needle valve. Tried adjusting it at all settings from all the way in to where it just about came out and never eliminated the backfiring issue. I'm going to try tightening the intake manifold bolts in the morning. Does anyone else have any other ideas? I ordered the rebuild kit today and won't have it till Monday and I intend on rebuilding the carb and having an adjustable valve put in instead of what's there but would like to use the tractor tomorrow.

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Paul A Young

04-05-2013 05:54:57

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 Re: Case 970 carburetor in reply to Keith Jones, 04-05-2013 03:09:07  
You need to get a manual load-adjusting needle valve to put in there.That is how you adjust the load.A good carb. shop should be able to help.They could just send you that valve in the mail.Good luck,Paul

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04-05-2013 09:57:13

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 Re: Case 970 carburetor in reply to Paul A Young, 04-05-2013 05:54:57  
Clark Re-builders, (660)882-5555 are very helpful

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04-05-2013 05:33:01

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 Re: Case 970 carburetor in reply to Keith Jones, 04-05-2013 03:09:07  
The solenoids are on certain models that would have a tendency to run-on after the ignition switch was turned off. The switch also shut off the solenoid which stopped gas flow to the engine.

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04-05-2013 04:12:37

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 Re: Case 970 carburetor in reply to Keith Jones, 04-05-2013 03:09:07  
Could have been the shut off solenoid.

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Keith Jones

04-05-2013 05:08:40

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 Re: Case 970 carburetor in reply to oldabe30, 04-05-2013 04:12:37  
Would it have been replaced with a plug or should it have been replaced with some type of adjustment screw?

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