If the screen is interfering with the sealing washer it would need to be cut down. I can rarely get a 100% seal with the tooth paste but if I can get to the point that it takes over 5 minuets for the fuel to run over, the vibration from extensive running will usually improve on that. The easy access to a fuel shut off on the tank, with type of needle and seat, indicates you can’t count on these things not to run over. I’ve had motors where I forgot to shut off the fuel and they went all night without running over. Others- I try to remember to shut off the fuel as soon as I stop the motor cause I cant trust them. Tubs
A "Boathouse Repair" is one thats done without having tools or the skills to do it properly.