Originally Posted by athene
Assuming the tanks are filled through separate inlets, the first thing I'd suggest checking is the O ring on the starboard filler cap. It's the most common cause of water ingress into the fuel.
Most common water in the tanks reason, compressed o-rings at the filler caps.
Be sure to replace them with nitrile or fuel rated rubber rings as they will swell up if they are not for fuel.
Be sure to regularly check for water in those steel
tanks, or they will get pinhole leaks
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