See full version: Removing Waterline Hull Staining
If you must use an acid on paint please be really, really, really, really careful and rinse it off immediately after the stain disappears DO NOT LET IT DRY. Do small 3-4′ sections before moving on and rinse, rinse rinse once the stain is gone. For a painted hull use the mildest acid you can find. I like a product called Spotless Stainless, which is citric acid based, not oxalic or hydrochloric based. here
There are a lot of products out there that contain an acid that will work but the On & Off Gel is one of my favorites. It also has much less “acid” odor than the regular On & Off and hits your nose a lot less forcefully…
This is also a great step to do before waxing a boat and it will whiten up most any old tannin/rust stained gelcoated hull.
To clean waterline stains I use MaryKate On & Off Gel pictured here. This is a huge improvement over the regular non-gel On & Off or basic Oxalic crystals from the hardware store. It’s also a lot cheaper and stronger than products like Davis FSR stain remover, but works similarly.
Tannin staining of your hull can be frustrating but luckily it is easy to remove, if you use the right chemicals or product. Any job goes smoother when the right product is chosen over the wrong product. Sadly over the years I have watched number of boat owners destroy gelcoat or paint by using sandpaper or abrasives to try and remove tannin stains. This is not necessary and as a matter of fact no elbow grease is required at all.
I also thought about drilling another drain hole thru the transom at the bottom, above the hull yet underneath the floor, but in the center of the boat where the "V" is the deepest. I know I cannot just drill the hole ( which is about 1-1/2" large just guessing at this point). I would need to put in some type of liner or something to protect the wood where I drill this hole, and the plug will go into this liner, same as the existing drain plug which is above the floor now. Any ideas on these two plans?
At the starboard side of the transom, (in the very corner of the rear of boat) there is a drain hole with a plug in it (rubber stopper plug) thru the transom for draining water that is "on the floor of the boat". The water I have is UNDER the floor and cannot get up to the drain hole. I do not believe there is any foam under the floor what so ever, as I can hear the water going all the way from the bow of the boat to the rear of the boat when I raise the front end up high. When I lower it, the water all gushes back to the front of the boat. There is a LOT of water. I thought of a few things I can do, but I am not comfortable trying anything until I get some opinions on things, or ideas on how to do it. Or should I take it in and have it done? I am pretty mechanically inclined and capable. here
I just bought this boat and took it out today for the first time. I had it in a repair shop for the past 5 weeks for motor repairs. . This boat was always garage kept until I bought it and took it for repairs. The shop left it outside for four weeks in very heavy rain. Long story short: The drain plug was in and the boat filled with a ton of water. The water got under the floor through some screw holes and bracket mount holes and seat box mounting screws etc. etc. The floor is VERY solid except for some small holes here and there from the previous owner doing things and adding things & removing things over the years. The boat is a 1965 Geneva fiberglass, 'V' hull. Model unknown. Has covered bow and level floor except higher under the bow. The hull is solid everywhere and the floor is solid except the screw/small drill holes about.
Can I drill a large hole ( about a 3" or 4" hole thru the floor) in the compartment where the portable gas tanks and the batteries are under the rear deck (splash tray?), then put in a bilge pump to get the water out that way? ( My old boat had no floor in that area and it was jut the boat hull back there so the water would all run back there and the pump was installed there (sitting on the bottom) and also had a drain plug thru the transom in the center of the transom where the boat hull is the deepest. This boat has the floor all the way to the transom, so there is water under it that cannot get out. The drain plug is at the top of this floor which is level thru the entire boat, except higher underneath the covered bow. ( Goes about 3" higher than the remainder of the floor).
I know the hull is solid and not leaking at all. The water trapped under the floor is strictly rain water and LOTS of it. Has to be gallons of it by the sound of it when I raise and lower the front end of the boat. I am raising it about 4 ft. up off the driveway and can hear the water rushing to the rear. Took it out today and could not plane the boat. 16 ft. boat, 75 HP and only got 10 MPH. Bow is staying up and I used a whole lot of gas. Motor is running great. Please respond with some ideas on how to do this or opinions or whatever you have. Thanks!
Anyway, as I understand now, the recomendation would be to open the deck, remove the foam (which has been wet at least from last 12 months). Is this a common sense? [links]
Just use a 1/4 " bit on a drill and see what comes out m8.. more
What would you recommend: restore it or leave it and buy another boat? here
Re: How can I get rid of the water in the hull?
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