Hull Vents

[BigLew]

Close. Forward facing in the bow and stern facing in the stern. Underway way, fresh into the bow and flushes the bilge to the stern. Even at anchor, the bow faces into the wind and in the forward vents and out the stern. The exception is smaller craft with only stern vents, then it is one faces in each direction.

[RS]

This is why none of the original Moesly SeaCrafts ever had the tanks foamed in. Potter didn't foam them in either, at least up thru 72, but it sounds like maybe the later CSY and Tracker boats may have had foamed in tanks.

To add tothe knowledge base - I know that 1978 and 1979s had foamed in tanks. Mine only lasted 28 years so that is not too short, but the failure did happen due to foam. The new tank is not foamed in.

[MARLINT220]

Bushwacker, I recently changed out my fuel tank on my CSY 18' and was really pleased to find that the coffin box was not full of foam when I opened it up. I got 23 years out of the original.

[Bushwacker]

SeaCraft is one of the few builders that provided a hatch so you could remove the tank to inspect it without tearing up the deck! That was the first thing I did when I bought my boat in 1975, and it was a good thing! During manufacture, someone had evidently dropped a brass nut used on the gages and the tank was resting on top of it! Needless to say, that creates a pretty good battery! Fortunately I caught it before galvanic action corroded thru the tank. Cleaned it up, painted tank with epoxy primer and original tank is still going strong! Pulled it again in 2006 when I repowered to replace all the hoses and it was still in great shape!

SeaCraft brochures also used to brag about not having foamed in tanks! They said it cost more, because then they had to ventilate the bilge, but they did it anyway because it made for longer lasting tanks!

[77SceptreOB]

To add tothe knowledge base - I know that 1978 and 1979s had foamed in tanks. Mine only lasted 28 years so that is not too short, but the failure did happen due to foam. The new tank is not foamed in.

My 1977 definately has a foamed in gas tank.....soon to be pulled out and replaced. Mine lasted 32 years!

[77SceptreOB]

Pulled my fuel tank yesterday. It was corroded all the way thru and leaking gas - YUCK. See attached picture. Just like everyone said, it was where the foam was in contact with the tank. Foam is coming out before the new tank is going in.

Jim

[gss036]

The tank on my 1989 also had a leak, but was in the back and there was no foam in that area. Just powdered corrosion. It was a very slow seep until I had it out where I could see, put water in it and scrapped off the corrosion and the seep went from that to a pee hole. We did re foam the new tank,but put 1/2" poly strips under the tank to allow water to run out if any gets in. Then put mounting strips bottom front and rear instead of the side. My side mounting strips were loose, the screws had been worn out of the glassed stringers. The under deck platform was completely dry.