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John Deere Tractors Discussion Forum

JD B running w/out air cleaner

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B Owner

08-27-2007 09:24:11

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I am working on restoring a basket case B. I have it running, no air cleaner or fan shaft installed. The RPMs seem to want to "run away", although it runs well. If I restrict the intake pipe a lot I can get it to idle ok.

Question: Is the restriction created by the air cleaner and the fan shaft load that critical to the engine speed?

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Mike M

08-27-2007 10:34:50

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Re: JD B running w/out air cleaner in reply to B Owner, 08-27-2007 09:24:11

Have you had a look at the governor to see if it has the weights and if they work freely ?

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Bob

08-27-2007 09:34:39

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Re: JD B running w/out air cleaner in reply to B Owner, 08-27-2007 09:24:11

Your governor linkage is set up wrong, or the idle speed stop on the carb is set wrong.

Either way, the governor needs to be able to pull the throttle butterfly shut a tiny but more, so the engine doen't keep speeding up.

An air leak past a worn throttle shaft can add to the problem, as well as a carb-to-manifold gasket leak, or a manifold-to-head gasket leak.

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B-FLY

08-27-2007 10:22:42

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Re: JD B running w/out air cleaner in reply to Bob, 08-27-2007 09:34:39

Remove butterfly.B-FLY

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