It is normal for Bio Diesel to have water in it. In Oregon we have mandatory 5% Bio Diesel content with many stations pushing the 20% so hard that they are forgiving the state road tax to sell it at a competitive price. The Fuel sender in my L3130 has been replaced once after it quit working and the fuel senders in the RTV and BX2230 are very rusty and all my fuel filter element end caps that are metal start to rust after time. Hence the reason on using the non metalic Kubota fuel filter housing as the bio fuel sucks moisture out of the air.
David
Can't argue with that; BUT like Ethanol gas the water ends up doing damage at some point. Chainsaws, weed eaters, lawnmowers, you name it, aren't meant to have water mixed in with the fuel as it is being burned, and the things that suffer is the carb needles, jets, seats, fuel injectors and fuel injection pumps, whether gasoline or diesel variety.
It would be one thing if the water could pass through without causing condensation and worse, rust on the way to being burned. As you said, fuel tank caps and anything exposed to teh moisture rusts and then the REAL problems begin.
Cars and trucks have closed loop fuel injection systems, and can therefore tolerate better some moisture. Tractors often sit for days, or weeks between use, and the moisture in the fuel, and sitting in the tank become problematic as Ethanol gas goes through phase separation and the water ends up at the bottom where the pickup tube is. Fuel water separators for diesels help stop a lot of the water that may be present in diesel fuel, and I can't imagine how 20% has gotten approval?!
For my boat engine, Yamaha, 4 stroke 225 fuel injected gas engine the warranty is VOID if 15% Ethanol fuel is used. If I'm not mistaken it is the same for my Toyota Forerunner; but I can't say for for sure without verifying.
Whether gas engine or diesel, water is a death-nell to both the engine and the owner's wallet.
