Jerry,
Pumping the tanks is not legal but remember where you are and that no one is really watching. I think the yellow is ab algae type stain. Seems more prevalent the closer you get to the dam. Up around the islands or closer to the middle of the pool you will not get any yellowing at all. The closer you get to Louisville at times of the year the yellow will appear. I have also got the yellow from Marinas at Cumberland when the water is warm. Might be exhaust and oil from generators. I tend to believe the algae as the Simple Green works.

The Muriatic acid 50/50 in a spray bottle takes it right off. Just use it on the stain and hit it with a 10 minute wax job. Waxing the water line with a synthetic type wax such as Nu Finish helps prevent it. I will often do a quick wax before going out and if I miss a small spot it will yellow there but nowhere else.

What are you doing for tunes on the boat? Have you seen these?
http://www.ssiamerica.com/products/neo35/index.shtml

Tim T.

Tunes? Not sure. I hope to get my new Spark-O-Matic
8-track player installed this weekend. I got a great deal on one. Just gotta finish making the cardboard mounting box so I can get it covered with some shag or velvet material. It should be real groovy.

That radio is awlsome. I'm WAY behind on technology today. Being the big stero guy that I am, I'm pretty content with my new Babbs speakers, MTX amp and 8" sub. Would like to install a bigger sub, but that one is built in from Fountain under the rear bench seat, fiberglass and all, and just no room for bigger w/o a major rework.

See Ya!
Jerry

If you or anyone else want the Neo35 in the above link I have a 60 GB library I could load for you. Covers all Genres. That is about 1200 CD's. Just Format and Partion the drive and load the directory. My library is legal as well.

Iron Out cleaner it is powder that you mix with water and it is really cheap,and sold at walmart and every other store.

Ring-Go didn't work. I truly find that hard to believe if it was used correctly. Did you wipe it on with a damp rag and let it sit for 5 minutes before spraying it off???

Answering your question; anything with muratic acid is going to be on the "strongest" stuff list. If you want straight Muratic just go to the hardware store and buy it cheap. Dilute it 2:1 and it will take off anything. Just be careful of your metal parts and be sure to thoroughly rinse every crevice or you'll cause a lot of damage. BTW, the same goes for any of the cleaners listed here...

Show us some pics

Ring-Go has been the best thing to take off the river scum for me. Nothing else would touch our stains except snobol and I won't use that on my boat. I had a couple of friends use snobol and the more they used it, the more often they needed to use it.

Ring-go is the best stuff I have used to clean off stains
35' boat sat in lake for 3months wiped it on with a wet rag gave it a rinse and shazaam back to new once again .
In a 32oz bottle I used less then a 1/8 of a bottle.
I am telling you this stuff works.
I own a auto dealership and have all kinds of cleaners
available .White wall cleaners ,wire wheel cleaners.
Nothing works as good or as clean as Ring-go.

No, Ring-go did not phase this yellow stuff. I left it on for 15 min, applied with both a damp and dry rag. Even scrubbed it.
I tried Iron Out last fall before taking the boat to the shop for bottom repairs. Didn't want them matching the stains, but it didn't work either. Iron Out did work on the previous couple of times when I boated at the same place. Don't know why it didn't work this time.

I got it off with Simple Green and a soft brush. I started by wet sanding with 3000 soaked with SG until I tried a brush. Anyways, it is white as can be now. Just gotta give it all a couple good coats of wax still.

Got a brand new bottle of ON-OFF that is going to go down the drain. Just the fumes from that stuff should have removed the yellow. Got a new trailer and ain't taking no chances of messing up the paint.

Save your money and try every day Lime-Away.
Where rubber gloves, wipe it on with a sponge, walk away and have a beer.
Magic!

I'm surprised the Ringo didn't do the trick. As Vype says and proven by many locally, the stuff works great.

But while on the subject of off-beat remedies, Mequires Tire/Rim Cleaner in a clear spray bottle with pinkish liquid found at your local Advance Auto for just under $4, works great for your run of the mill yellowing without any caustic ordors. The thinbg about ON/Off is it contains three acids and is highly caustic. I used it a few years ago on my 230SX Stingray after it took forever to get yellow. After On/Off it apparently etched my clearcoat, because it started yellowing everything d*mned weekend. I'll never use the stuff again.

My rule of thumb is if I can'r apply it without using a full body suit with respirator to apply it doesn't go on my hull. Would you use something like that on your new car finish? Maybe that's the litmus test...