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How to Fix a Leaking Pontoon Boat In 11 Steps


If you have a pontoon boat, then you know that keeping it in good condition is essential to enjoying your time on the water. Unfortunately, even the best boats can develop leaks over time. Having a Leaking pontoon can be a major pain, but luckily there are some things you can do to fix it.

In this guide, we’ll show you how to fix a leaking pontoon boat so you can get back to enjoying your time on the water. We’ll cover everything from finding the leak to patching it up so your pontoon boat is good as new.

How to Fix a Leaking Pontoon Boat:

Fixing a Leaking Pontoon In 11 Steps

Items you will need

  • Dishwashing soap
  • Power drill
  • Marker
  • Snap rivets
  • Rivet hammer
  • Epoxy
  • Epoxy solution
  • Wire brush
  • Solvent
  • Rags
  • Pliers
  • File
  • Aluminum patch
  • Aluminum cutting materials, such as tin snips

Step One

Bend or cut any aluminum fragments that are protruding from the repair area. Dishwashing liquid and water should be used to clean the place to be mended. Remove any dirt by scrubbing with a wire brush. When the area is dry, use a cloth to apply a solvent. You can use a solvent explicitly designed for cleaning metal or a conventional solvent such as Acetone. This will get the repair area ready for the epoxy.

Step Two

Measure the area that has to be fixed. A patch of aluminum at least twice the size of the afflicted region is required. For instance, if you have a 3-inch gash in the pontoon, you would need a piece of aluminum that measures 6 inches on every side.

Step Three

Apply the aluminum to the damaged area. Bend the new component to fit the pontoon’s angles.

Step Four

Drill a hole in each patch corner. Match the size of the hole to the size of the snap rivets. The size of the snap rivets will be determined by the thickness of the pontoon’s aluminum.

If the rivets are too small, they will not go all the way through the patch and into the pontoon; if they are too large, they will not make a good seal. Drill the holes with care to avoid disrupting any of the features in the aluminum patch. Any rough edges should be filed down.

Step Five

Reapply the aluminum patch to the repair area. Take out the patch. Make a mark on the pontoon where the rivet holes in the patch meet—drill holes in the pontoon where the marks are.

How to Fix a Leaking Pontoon Boat:

Step Six

Coat the pontoon repair area with the epoxy solution. Allow this to dry according to the manufacturer’s recommendations, if necessary.

Step Seven

Inside the aluminum patch, apply the epoxy sealant.

Step Eight

Place the aluminum patch over the repair area, making sure to align the patch’s holes with the rivet holes in the pontoon. Snap rivets should be hammered in place.

Step Nine

Drill extra rivet holes through the patch, about 1/2 inches away from the outside edge and into the pontoon to reinforce it. Snap rivets should be hammered into position.

Step Ten

Apply more epoxy to the patch’s edges. Allow for drying time.

Step Eleven

Re-Check for leaks in the pontoon.

How to Fix a Leaking Pontoon Boat:

How do you tell if you have water in your pontoons?

If your boat is lying lower in the water, or if one pontoon is sitting much lower than the other, there is a fair probability there is water in one or more pontoons. Please remember that one pontoon may sit slightly lower than the other when your gas tank is full.

Aside from those, as mentioned earlier, can pontoon boats stay in the water? Pontoon boats are suitable for inland lakes and rivers and ideal for coastal seas.

In truth, they’re frequently utilized on the ocean, albeit usually close to shore and in inter-coastal locations like bays and inlets. On calm days, we typically suggest that you can be safe within a couple of kilometers of the beach.

How do you get water out of a pontoon on a pontoon boat?

How to Fix a Leaking Pontoon Boat:

The only method to fix a leaky pontoon is to drain the water and correct the underlying issue that caused the leak. Some pontoons with plugs and some that don’t, and we’ll look at what to do in both circumstances.

For Pontoons with Plugs

Plugs were commonly fitted on the bottom of the boat and the top of the pontoon tubes in older pontoons. If one of your pontoons is flooded and has a plug on top of the float, here’s what you should do.

  • Remove the pontoon’s stopper that has water within it.
  • To drain the water from the pontoon, use a regular garden hose.
  • If you are unsure if your pontoon has plugs or not, you may contact the boat’s manufacturer, who will be able to inform you.
  • You should also notify the manufacturer of your boat about what has occurred.

For Pontoons without Plugs

The majority of newer pontoons are built without plugs. Pontoons aren’t designed to have water go inside them, and plugs may cause more harm than good.

The following approach works on pontoons without plugs, but it also works with plugs if siphoning the water with a garden hose is unsuccessful.

  • Pull your pontoon from the water and tilt it gently forward or backward so that the water may run elsewhere.
  • Drill a tiny hole in the bottom of the pontoon on the side that is leaning down, depending on which way the boat is tilting.
  • The opening will allow water to escape from inside the pontoon. Make sure that you do not drill a too-large hole to patch. The ideal size is from 5/16 to 34, but no greater. Drilling a smaller hole is OK, but the water will take an eternity to drain out of your pontoon.

Can You Use Flex Seal on a pontoon boat?

Flex seal is effective as a temporary repair for minor leaks in a pontoon boat. However, it should not be utilized as a long-term fix for a leaking pontoon boat.

Will JB Weld work on a pontoon boat?

The J-B Weld Water Weld would repair pontoon boats and be effective in residential plumbing if it could tolerate water. This waterproof epoxy will not only be waterproof, but it will also set and cure underwater. Two putty sticks are included: one for the resin and one for the hardener.

What’s the average cost for Professional Repair of A pontoon boat leak?

Owning a pontoon boat appears to be a pricey investment. A pontoon boat costs roughly $4,000 to $6,000 per year to keep and repair. Nonetheless, the advantages of having your pontoon boat may outweigh the expenditures

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