engine won't throttle back up

[goat fan]

I have a John Deere model 455, 3 cylinder diesel. It's rough starting , but most of the time it will throttle up and run. At other times, when you throttle it down, it won't throttle up again and idles rough.

 

[lawn mower fanatic]

I have a John Deere model 455, 3 cylinder diesel. It's rough starting , but most of the time it will throttle up and run. At other times, when you throttle it down, it won't throttle up again and idles rough.

WELCOME TO LMF!
It would help us if we had mower/engine model numbers.
Good luck! :smile:

 

[goat fan]

There are a lot of numbers on it. The engine model is: 3TNA72UJ3, serial number: CHS029D076047. Engine family: SYD1.0U6D2RA, displacement 879 CM3 John Deere. On the radiator is has: 54 Mulcher compatible, TCD P/N 04-0D33, JD P/N AM121535, Mfg. date 01-10-97. The owner's manual says its a model 455.

 

[lawn mower fanatic]

There are a lot of numbers on it. The engine model is: 3TNA72UJ3, serial number: CHS029D076047. Engine family: SYD1.0U6D2RA, displacement 879 CM3 John Deere. On the radiator is has: 54 Mulcher compatible, TCD P/N 04-0D33, JD P/N AM121535, Mfg. date 01-10-97. The owner's manual says its a model 455.

OK thanks...that will help the mechanics on this forum try to give you an answer. Hopefully one will respond soon.
Good luck! :smile:

 

[Carscw]

I have a John Deere model 455, 3 cylinder diesel. It's rough starting , but most of the time it will throttle up and run. At other times, when you throttle it down, it won't throttle up again and idles rough.

Does it smoke when you try and throttle up?
What color smoke

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