Upgraded cleats, port tank (not my boat in the photo).

New-style tank cover (not my boat in the photo).

New-style tank covers (not my boat in the photo). Also shows "factory" (builder) floorboards in foreground.

Moeller 23-gallon tank, stbd.

Moeller 23-gallon tank, port

Original separator

New separator

Has two ports on each side

Has two ports on each side

See notes on next photo - don't go by this information!

As it turns out, there is apparently now a newer red gasket. So there was old red one, newer green one, and newest red one. But Parker cannot point to a date for the change(s) or describe how to tell the difference other than comparing them in person (seems weird). Also, they changed the information they gave me on the date, which I corrected here. Added later: They sent me one of each - see photos on ahead a few.

Attwood 1674 fuel vent with wrong measurement on their website. The cutout hole for the flush vent 1674 is 1-3/8" (confirmed by e-mail with Attwood and then in my hands after I ordered a pair of the vents).

I got the idea the website must be wrong because this non-P-trap-but-same-style Attwood flush fuel vent showed it taking a 1-3/8" hole, and plus it only made sense it would have to be a larger hole than the protruding vents.

Fuel vent original placement

1674 vent

Vent new hole marked. In order for the P-trap to fit under the side deck, the new 1-3/8" hole had to be as low as possible (of course while also encompassing the old 3/4" hole).

Here you can see how it will fit on the inside. This black plastic bowl is just a spacer; it doesn't actually comprise the seal. There are three optional spacers that come with the vent - this is the largest one. I can't tell yet whether I'll want to use this one or the next smaller one, but I wanted to make sure this one would fit. It's close with the steering cable, but it does fit. The P-trap part goes inboard of this.

New 1-3/8" hole has superseded old 3/4" hole.

New vent set in place in new hole.

O-rings 1

O-rings 2

O-rings 3

This photo shows the original fuel tank installation on a 2002 22 Cruiser. These are 25-gallon tanks (not Moeller brand). As you can see, they come forward slightly past the splashwell, thus the cover panels only run up about 7/8 height. Somewhat interestingly (in a leverage sense), the straps that run over the tanks run from the top of the cover panel over the tank and down to the sole behind the tank at the transom. With my new tanks I'm switching this around, so the strap runs from the bottom/sole at the forward side of the tank to the transom near the top of the tank. Thus the cover panel will not be involved (also the newer, 23-gallon tanks will tuck "behind" the splashwell and allow for full height covers). See more about installation in next photo.

Same photo but closer view of cleats. Moeller (and I would think other plastic tank mfgrs), specify 3% all around space to allow for tank expansion (not because of heat but because the material absorbs petroleum, from what I gather). The cleats holding these tanks in were butted right up to the tanks, with no expansion space at all, from what I can tell. When the tanks expanded, they pressed on the cover panel - and to some extent the cleat - and "levered" the cleats up out of the sole (they were made of starboard screwed directly into the sole/core). I'm hoping to avoid these issues with the new tanks by installing them differently.