Diesel Fuel Filter

Is this normal? I have 100 hours on it, it’s heating up a running fine but never seen it this way before. Thanks.

It’s microbrobial growth or diesel fuel algae. Plenty to read up on online.

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How old is the unit? You can’t let diesel sit around too long it will grow stuff. Always have a couple of fuel filters on hand. This goes for anyone running a diesel truck too.


You may have gotten some bad diesel. Or it has been a minute since that burner got ran. Or you have never changed that filter. Did you get it after a bad rain. Kudos on the catch though!

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