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The only problem with this is that dealers are slammed this time of year.
I'm skeptical of your modified plugs. Water SHOULD sit on top of the plugs when running. If it doesn't, then there is a gap allowing the water to flow out into the intake area. Water sits on top of the plugs after it washes over the swim deck when you come off plane. Then is sits on top of the sealed plugs until you remove them (each trip). If the water is no longer pooling on top of them I suspect you are pulling air through the plugs and causing cavitation.
Is this proven? I just don't see how it can be true. I have taken my boat out for a short trips, mostly in no-wake zones and the plugs are still filled to do the door with water. There is no way that much water splashed on top of the deck.
It is also pushed up through the clean out drain....(drain in reverse). But yes....very rare NOT to see water on top of the plugs after running. It also doesn't need to get on top of the deck....is just goes under it. But someone on here posted a while back that he confirmed water does come up through the drain. So both are valid ways to get water in there.
I guess I am good since mine are always 100% full lol.
I had some material in the boat called mule tape. We use it at work to pull cable through conduit, its very strong and thin maybe the size of 2 shoe laces side by side. I cut it the diameter of the plug and used a little marine grease i had in the boat to kind of act like glue to hold it in place. I wrapped it around the plug and just pushed it between the hard part of the plug and the soft rubber gasket. The plug seemed to lock in more solidly, if that makes sense. After doing that i didn't have any water in the clean out tubes the rest of the day
I started both engines and they sound pretty clean, no rubbing sound
Water in the clean out tubes is a GOOD THING...it means the tubes are SEALED. When there is NO water, that means it is leaking past the seal. The water gets there from backing up the drain, and from overwash on the swim deck, not from being blown past the plugs. If you have water sitting on top of the plugs, this means they are sealed and not allowing the water to pass them (down). I would pull that off and see what happens.
It doesn't sound like a bunch of bolts in a blender? It should.
No. Not at all
Now this has me interested. My '17 212x doesn't sound like that either, its loud but more just open exhaust sound, definitely not like metal on metal. I'm only 5-10 mph off what I would have expected but have been wondering why - could it be related I wonder? They all sound like this or is it possible that some don't?
OK....a bunch of bolts might be a bit of an exaggeration, but you typically hear metal on metal clanging sounds from the pump when the edges of the impeller contact the wear ring-especially when you first start the engine and it is vibrating more.
Just starting the boat and only going through the no wake zone for a mile the tubes fill. If i get water over the swim platform and fill the tubes the water stays
At what point did you add the tape? Recently while trying to fix the current problem? If before the performance problem existed? Did the boat ever get to plane in <3 seconds?
Guess it just gives me one more inspection to check off in my quest for where my last 5-10 mph is.
Yesterday afternoon while troubleshooting