850D sxs won't start please help.

I have an older 850D that's ran great the whole time I had it until last week I got water in the fuel. I use it on a farm and just fill it up out of my fuel tank but my tank apparently got a leak and got tons of water in it. I drained the tank and changed filter and put new fuel in with some diesel 911 and got it running again pretty easily. It ran for about two weeks just fine and today while I was using it it just shut off and I can't get it fired up again no matter what I try. I drained the fuel again and out new fuel in but it still won't start or even try to start. Any ideas on stuff I could try to get it going please let me know. Thanks for reading!

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