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JD 770 Engine starts cutting out after 10-15 minutes of cutting

Chris Northcutt John Deere 770 starts to cut out after 10-15 minutes of cutting. If I stop cutting I can usually run it for a minute or two. After letting it cool off, I can start tractor and cut again for 10-15 minutes, then it does it all over again.
ponymare What engine is on it?
IHTimmy Well ponymare it is a Yanmar engine three cylinder diesel The whole tractor is a Yanmar when was the last time he change the fuel filter and check the wiring on your engine make sure it's nice tight connections it might have a warning system on it

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