Hi Al,
I replaced the fuel fill o-ring 3 years ago as I chased down the reason I had water in my fuel……… that traveled into the Racor……..that traveled thru the Racor (yes, Racor filters will pass water into the injector pump -Racor will say no – good filter people will say otherwise) and destroyed my injection pump on my 4-107.
The o ring on my fuel fill had “shrunk” and became brittle.. lousy seal. Allowed water on the deck to ingress to the tank.
Expensive lesson!! New O – ring cost a couple $$ – Injection pump was a whole lot more!
I’ll probably raise the fill this year on a 1/2 inch round base as I goof around on the decks..some of the glass is so,so, and might get fixed this year.
Al, Good reminder for everyone
Mike