f3990

  1. Brown Dog

    F3990 vs newer F3710 4wd front deck mowers

    Will both machines come out of 4wd ? Both are basically same HP I think. I think I’ve got one of my ZD1511 sold & wanting a 4wd for steep banks. I don’t necessarily like the front deck running on the ground because I have rough farm Ground. Regens are no issue as I mow 3-6hrs at a...
  2. smartguyz

    F3990 Owner: Why can't I run B100?

    Hi TBN friends! I just became the owner of an F3990 Front Mower. In general it works really well. I have been reading the owners manual and it states that you shouldn't run anything more than B5 diesel in it. (5% biodiesel). It gives no reason for the warning and admonition. Given that...
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