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4040 update

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Jeremy in ne

08-23-2014 12:20:25

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I put the fuel additive in and ran it most of the day. It did improve its ability to idle down some but when mowing if I ran the rpms over 1700 it would want to run away or over rev when going down a slight incline. If it's the governor is there anything else I can do?

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Kent Petersen

08-26-2014 17:43:56

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 Re: 4040 update in reply to Jeremy in ne, 08-23-2014 12:20:25  
get some soyl oil and add to your fuel make it about 10 to 20% that will do or not if not it will take a overhaul on the pump down

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T in NE

08-24-2014 14:19:41

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 Re: 4040 update in reply to Jeremy in ne, 08-23-2014 12:20:25  
Run some cheap 2-stroke oil in it, lubes things up better than most additives, and is cheaper.

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Jeremy in NE

08-23-2014 16:31:28

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 Re: 4040 update in reply to Jeremy in ne, 08-23-2014 12:20:25  
Will give it some more time. It does have a rebuilt injection pump from about 6 years ago. Deere did the work. Are these pumps something I can repair? Thanks for all the help

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08-23-2014 16:01:49

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 Re: 4040 update in reply to Jeremy in ne, 08-23-2014 12:20:25  
I had a 4020 that was acting similar to that.
Sometimes you could pull the throttle down and it would take a few seconds to react.Sometimes if I turned the key off it would run for 20 seconds before it would die.I drained the fuel tank
completely and changed the filter.The last of the fuel that came out of the tank was black.After that it ran fine with instant response from the throttle and would shut off when I turned the key off.Old fuel can cause a lot of problems.

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08-23-2014 12:43:11

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 Re: 4040 update in reply to Jeremy in ne, 08-23-2014 12:20:25  
There's really not much to happen to the governor unless assembled wrong. You haven't had it apart right?
The metering valve is probably sticking. Maybe rust or gummy. Have seen them wear.

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Tim S

08-23-2014 13:22:33

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 Re: 4040 update in reply to D-, 08-23-2014 12:43:11  
That's what I'm thinking too,, setting around and got sticky,, a little run time may clean it up..

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Tim S

08-23-2014 12:40:01

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 Re: 4040 update in reply to Jeremy in ne, 08-23-2014 12:20:25  
Give it a little more time..

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