Originally Posted by Stigomery
When you mentioned this before I considered doing the same... i was always puzzled "why" though - per my other comments about garden equipment never having had a problem in 20 years of, well, neglect and crappy fuel.
Is it down to condensation? Or water ingress from just being on the water? or?
It's certainly possible that if you take a big wave some of it can find its way into the tank via the vent screw.
Of course if you fill at sea from Jerry cans then rain or sea spray is a risk.
If you use dockside fuel there is often a poorer reputation and so a risk.
I'd say condensation is only a big issue if you store tanks (part) empty.
However, if you have good "fuel hygiene" and keep an eye on what is actually inside your tanks then with portables in a sib I think you need to be unlucky to fall foul of enough water in your fuel to cause you trouble. Life may be worse with modern injectors and at the cost of fixing those a filter may be worth it?