Useful sawmill mods

[Magicman]

My sawmill is set up with two fuel filters; the primary includes a water separator and equipped with a petcock drain in the bottom.  I occasionally open the drain and in 20+ years, I have never seen any water.  The secondary filter is a standard screw on type.

I replace both filters during every other oil change.

[barbender]

No, but my ol girl ('97 model) has a big water separator filter after the tank.

[TimW]

Mine has a water separator  after the tank too, with a drain.  But the fuel pickup (straw) is about a half inch above the bottom of the tank.  Like Magic Man, I rarely see water in the separator.  So you can get water below the pickup and not know it, until you run awhile and the return fuel stirs the bottom fuel up.  Then I sometimes get sputtering. 

I run Power Service in my fuel, but will be changing to Peak Blue Agri Clean additive when I refill the storage tank, which has a sump drain.  Also, when I asked the Yanmar industrial service center what they used, it was the Agri Clean.  He stated it is the best at holding the water molecules together.
I am changing because I think the Power Service, over time loses it's ability to hold the water molocules together at the bottom and the returning fuel stirs it back into small water droplets that do not sink, but enters the engine with the diesel.  It takes about 45 minutes for this process to start.

When it starts sputtering, I can remove the tank and see water suspended in the fuel with no large concentrations at the bottom of the tank.  Another time. when it starts sputtering, I can shut down and remove the tank the next day.  Then I find large globs of water at the bottom of the tank.

This is a Tier IV Yanmar,  spell that as Finicky.  It needs super clean fuel, while my other diesels (1998 to 2003) don't have any problems with a smidgen of water in the fuel.
I have told WM that their water separator does not work 100% of the time, as I can have sputtering and no water in the separator, but the next day have water at the bottom of the tank.
I guess it being 94% humid today doesn't help.

[barbender]

 That's interesting. I've never had a single water related issue with my fuel on my mill. Actually, I don't think I've ever had a water issue on any diesel engine of mine, though I've been around a few. 

 I can see where your Tier IV would be much more sensitive. Sorry I don't have any ideas for a solution.