About 3 weeks ago, out of the blue the tractor started running a little rough when idling. I have also noticed a slight but noticeable decrease in power when mowing up a slight grade. Have mowed 4-5 sessions @ 1.5-2 hrs or so with this condition. Condition has neither decreased or increased. If I were mowing a constant straight and level, I might not even notice the problem. Hoping it's the rear filter but don't know. Thought I'd replace both filters and if the problem goes away, Then I plan on doing the Racor filter with water separator mod.
I just found out that the tank I've been getting diesel from is contaminated with gasoline. Never smelled it but that's what my BiL told me and showed me in a glass jar. The jar looked and smelled like 100% gas to me. This fuel was from them having to pump - off a station when one their drivers wrongly dumped gas into a diesel tank. I have since run enough non - contaminated fuel through the tractor to have no more gas mix imo.