Andy, If you calculate how much water can condense in the fuel tank you would find that the amount is miniscule. The main source of water in the fuel tank is the crumbled O ring at the fuel cap.
If you keep a full tank on a hot day, the fuel may expand and leak through the vent. Many marinas forbid filling up tanks to the top, especially before the winter storage (and this is when most people think that having a full tank is beneficial). Marek 1994 C270 “Legato” Ottawa, ON From: Andrew Burton via CnC-List Sent: Friday, June 30, 2017 10:04 To: cnc-list@cnc-list.com Cc: Andrew Burton Subject: Re: Stus-List Question on best fuel filter setup Per instruction from the best diesel mechanics I know, I run a 30 micron filter in my Racor and a 5 or 10 in my engine filter. I don't wonder that your 2 micron filter clogged as soon as your roiled the fuel in your tank. I'm surprised it took that long to stop the engine. A useful addition to ease changing filters is a small electric fuel pump between the tank and the Racor, but I keep a quart or two of diesel in a bottle and top up the filter exactly as you did. Now that I've cleaned my tank, I only change filters once a season so it's hard to justify installing the pump. I do make sure to keep my tank full as much as possible to avoid condensation forming inside it. Andy C&C 40 Peregrine
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