You'll have to look at your cleanout tray, and if you have that drain fitting, circled in pink, it allows water into that area. You also may get some flow past your cleanout plugs. Look at the pink circle, see how the fitting is raised? That means nothing is going to drain until it gets past that lip, or it rises above that lip. If the cleanout tray itself is not sealed well along the edge, indicated in green, all the water that isn't draining out due to that fitting just sits there and slowly drains into your bilge through any poorly sealed areas. If you get a huge amount of water in there, such as when coming off plane, enough water builds up that it covers the cleanout tray hatch.
That hatch isn't shown in
@1BadTundra's pic, but the oval rubber o-ring that is on that hatch cover does a piss-poor job of sealing out any excessive amount of water. Any water that makes it that high will then flow into the bilge there as well, represented by the red circle. That riser puts the cleanout hatch high enough that it should NOT build up to the point that it leaks in through the red circled area, and drains out through the stupid pink circled fitting.
View attachment 171855
On mine, that drain fitting sits in a recess. I replaced that white plastic fitting with a stainless fitting that has a flatter flange. Less of a lip, so water starts draining faster. Any improvement of the cleanout tray gave me noticeable and better results in removing water. Jet Boat Pilot sells a
3D printed CNC-cut Starboard riser if you don't have tools or the wherewithal to make one yourself, like
@1BadTundra did. I did the same, and the benefit for
@1BadTundra and myself, ours are 1" tall, whereas JBP's are 3/4" tall, and the DIY version can be had for 1/3 the cost - JBP's is $90.
If I were you
@David_411, I WOULD "fix what isn't broken". At the very least, there's not a chance in hell that the cleanout hatch cover will seal out any water, so make/buy a riser and install it. Since you have to do that work there, make it easy on yourself and pull the cleanout tray to add your riser. While you've got it out, either replace & seal your white plastic drain fitting with a stainless, or remove and ENSURE that white plastic fitting is sealed. After you've sealed the drain fitting and installed your riser, put the cleanout tray back in place. Either seal under the edges of your cleanout tray where they likely didn't COMPLETELY seal the tray, or seal around the edge, like you were caulking a tub.
It sounds like way more work than it actually is (unless you're fabbing your own riser). Yes, this is one of the bigger problem areas for leaks, but it's reasonably easy to address.
@1BadTundra that's a nice job, and I like the color.
jetboatpilot.com
