I would start with a complete fuel system clean out with new fuel lines and filters being used. Tank removal and clean out. I like using Rotella 15W40 oil. Pretty much just good common sense on maintenance.
Awesome looking 782D by the way. Congrats. 
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DWayne
1973: 128, ag tires, 3pt. lift, spring assist, lights, 42" Deck
10" moldboard plow
2016 XT1 42" deck 18HP
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