Does anyone know the size of the 0-ring on the waste tank cap?

l-skynyrd

The last time I pumped out the o-ring on the cap fell into the water.

Need to buy a new one.

5171943

any hardware store, home Depot or Lowes has "o" rings. Take the cap with you or take the fuel cap "0" ring with you it should be the same

Cableguy Greg

The part number from Perko for the waste/water fill is 0513DP8. A search will pull up a bunch of retailers.

Cableguy Greg

X2 on West Marine. I replaced my fuel cap o ring on my old 232 and my new 280. They are made by Perko.

http://www.westmarine.com/rubber-d-o-rings/perko--o-ring-only-for-vented-fill-0540--14121917

Michael T

I carry an extra cap with me as I saw a kid at a pump-out station drop a guys cap into the water last year. I keep it in a zip bag with the "key" for the cap. You get two caps in the parts container from Perko. MT

Black_Diamond

The fuel o-ring is larger cross-section diameter than the water/waste o-rings.  I have the info at the boat and can pass it on tonight, I want to say one is a 1/8" dia the other 3/16"  Both butyl-n material, if you can find the gas one in Viton it is worth the few extra bucks.

Michael T

Thanks BD - good catch! Thanks for the part numbers Greg! MT