1980's bronze pipe deck fill plates

[bcterraflight]

I have a 1981 Defever 48 with bronze deck fill plates. The O-rings are well worn and due for replacement. Unfortunately the o-rings are very fine in material diameter; typical Perko or automotive o-rings are too "fat".

The fresh water deck plate o-rings are 1-3/4" diameter.
The diesel deck plate o-rings are 2" diameter.

Does anyone know of a replacement source? I don't know who manufactured the deck plates. They are bronze with cast "Water" and "Diesel" markings.

 

[RT Firefly]

Greetings,
Welcome aboard eh? An auto parts store usually has an assortment of o-rings on hand. Are these actually o-rings or are they round gaskets? Meaning in cross section are they circular or square/rectangular?

NAPA?
Lordco?
Canadian Tire?

https://www.yellowpages.ca/search/si/1/Auto+Parts/Campbell+River+BC

Possibly a hydraulics shop?

https://www.yellowpages.ca/search/si/1/Hydraulic%20Equipment%20%26%20Supplies/Campbell%20River%20BC

 

[Comodave]

Even if you put a slightly larger cross section O ring, it will probably seal if it seats in the cap.

 

[bcterraflight]

Thanks!

Now that you mention it, they did seem more rectangular in cross-section (round gaskets). I just assumed that they had squished over time.....

I stretched the 1 1/2" Perko o-rings around the 1 3/4" cap; the cap seems to seal but does not screw flush to the deck. The cap sits proud.

Next week I will check with the local hydraulics shop (old gasket/o-ring in hand)

 

[O C Diver]

Those orings are usually 1/16" thickness. If the OD (outside diameter) is 1 3/4", then the oring is #030. If the oring ID is 1 3/4", then it's a #031.

Ted

 

[Xsbank]

Jeez Ted, you just know that stuff?

 

[bcterraflight]

#031 and #032 seemed to do the trick. Thanks. Fortunately I have a wide selection of industrial shops and boating stores near the marina!