Leaking Pontoon House Boats - How to Find and Repair a Leak?

Find & Repair Leaking Pontoon House Boats

Find & Repair Leaking Pontoon House Boats

Leaking pontoon house boats can be annoying, and wondering how to find and repair the leak?

Pulled my pontoon boat out today, heard a gurgling sound in pontoon, did not pull drain plug yet. Why a drain plug if pontoons are chambered?

If a leak, how would I find it, and what are some suggestions as to repairing. Willing to buy a repair manual if available. Thanks.

Reply - Answer
Well, sorry to hear about your leaking pontoon house boat. I know the feeling since I also had a pontoon boat that leaked water into the chambers.

The extra weight alone of all that water didn't help in the performance department. The one advantage of a leaking pontoon is that what goes in, must come out!

So we have two things to look at, where's the leak, and how to repair it?

Where is it leaking?
Like we said before, "what goes in, must come out". So, if the water is still inside the pontoon, you may be able to see where it leaks out.

You can also try and have a look around the pontoons to see if there is any damage? Maybe beaching or an impact caused a crack, puncture, or a welded seam to let go?

You can also used the drain plug to fill the pontoons with a water hose to see where exactly the leak is. If not, you can also use an air compressor to fill the pontoons with pressure to listen for a hissing sound, indicating where it leaks.

How to repair the leak?

Once you have found the problem area, you have a few choices to repair it. You can weld the damaged area, or you can use a "putty steel like compound" (available at auto parts stores) to seal the area.

You didn't mention if the pontoon material was steel or aluminum, so I will presume that they're aluminum. Welding aluminum is trickier than welding steel, so I would recommend speaking to a welder who has experience welding marine aluminum.

The other alternative was applying the "two part steel putty like compound" to the affected area. This steel putty like compound hardens in @ 1 hour, and can be drilled, tapped, or machined, since it has steel like strength. This repair putty is also a great product to have "on board" since it's excellent for emergency repairs because it even hardens in water.

Now that's the two methods that I'm familiar with, however possibly our readers will have other tricks and tips to help you out?

Lastly, hopefully some of our readers will share and post comments about their pontoon house boat repair experiences. Feel free to use the "Click here to post comments." link found at the bottom of this page.

Thanks again for sharing, IAN - from www.all-about-houseboats.com

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Comments for Leaking Pontoon House Boats - How to Find and Repair a Leak?

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Baffles or chambers, how to know?
by: steveus

Don't know if I have separate chambers, or there are baffles, best way to find out?

Water in old pontoon
by: Anonymous

Is there a simple way to add drain plugs to my pontoon?

Finding pontoon leaks
by: Walter Knapp

I think the easiest thing to do to find the leak would be to first, put about 3-4 pounds of air pressure in the pontoon. If you can't hear a leak right off, use a solution of dishwashing soap and water, and apply to the pontoon with a brush.

The leak will cause bubbles to form, and it's not hard to see the problem.


Houseboat Pontoons - tips for finding leaks in tubes
by: Anonymous

Do not put more than 5 lbs of air pressure or else serious injuries can occur. You only need a little air pressure. I am doing the following this weekend: installing 1/4" Sharaeder valve (a tire tube pressure valve at one end and the 1/4" pipe thread at the other).

I am also gonna take our Halloween smoke machine and direct vapour smoke into the tubes, then pump 3-5 lbs of air to see where it leaks.

My frustration is as water gets in and although my toon is on a boat-lift (Sea-legs) and out of the water - there is no sign of water coming out from where it came in so that means the leak is above the internal wareline of 1 or 2 inches of inside and below the waterline.

I suspect a cracked weld or weld created hole from the heat OR my miserable narcissistic neighbour who possibly drilled a hole somewhere (not the first time they did something to my boat)

Testing Pontoons on Houseboats - how much air pressure
by: Anonymous

Do you know how much air pressure you can apply?

Excellent reference for pontoon house boat repairs
by: Anonymous

Thanks for providing such great information. I used your site as one of the sources for an article I was researching. I have included a link to you in the references section.

Thanks for the compliment about great information.

IAN from www.all-about-houseboats.com

Houseboat Leaks - finding the holes
by: Arizona

I removed the drain plugs and installed and air chuck which you can get at your local hardware store for 2 bucks. Then I attached the Air Hose and filled the pontoons with air until I heard the air come out.

Meanwhile I also got a sprayer and filled it with liquid dish soap and while the pontoon was filling I sprayed it with the water and liquid soap mixture. When I saw the bubbles I knew that is where the leak was. Want more help let me know.

by: Anonymous

thanks for the info on checking and repairing the pontoons. did anyone have any other ideas on repair?

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