Hey we just currently purchased a B6000 4wd and it was running great for about a week, used it to scrape the driveway with no issues. I was using the mower yesterday and it started running sluggishly then it would speed back up then go sluggish again. It died on me I towed it back to the barn and checked the filters and fuel lines drained out the old diesel and I am going to put fresh diesel in. I have zero experience on diesel engines and was wondering if there was anything else I should do before I try starting it up? Thanks in advance.