How Do I Repair a Hole in My Jet Ski?

Whether you’re riding a Sea‑Doo or another watercraft, discovering a hole in your jet ski’s hull can feel like a major roadblock to fun. Holes in a jet ski’s hull can quickly turn a fun ride into a safety hazard. Even small cracks or gaps allow water to seep inside, which can compromise buoyancy, flood the engine compartment, and damage internal electronics. Left unchecked, these leaks can cause the jet ski to stall, sink, or require costly repairs.

But with the right tools, materials, and steps, you can tackle this repair confidently. Read on for a step‑by‑step guide to get your jet ski back on the water—fast and smooth.

Why Should You Repair a Hole in Your Jet Ski?

A hole in your jet ski is more than just cosmetic damage—it compromises safety and performance. Water will leak in, potentially flooding internal components, affecting buoyancy, and harming your ride. Taking quick action to repair the hole ensures you can ride freely without risking bigger damage down the line.

How to Repair Holes in Sea Doos and Jet Skis

1. Identify the Damaged Area

Start by giving the outside of your watercraft a good look. Clean it thoroughly—remove dirt, old paint flakes, or any loose threads around the hole. Dry the area completely so any cracks or the actual hole stand out clearly against a smooth, clean background.

Use a flashlight to inspect the inside of the hull, too. That helps verify the full extent of the damage—whether it’s a shallow dent, a through‑hole, or multiple cracks. A small crack that looks fine from the outside might still be leaking; the inside view helps you plan your repair effectively.

2. Prepare to Repair

Next, it’s time to gather your materials. You will need the following:

• Fiberglass repair kit or Bondo, suitable for hull repair
• Sandpaper (fine and medium grit)
• Clean cloth and acetone for wiping
• Paint or gel‑coat matching your ski’s color (for a flawless, seamless finish)
• Brush or roller for paint or coat application
• Protective gloves and safety gear

Pull your jet ski onto a sturdy trailer or platform so it’s off the water and stable. Make sure you leave access both outside and inside the hull, especially if you want to reinforce from within.

3. Clean, Cut, and Sand Your Sea-Doo

Cut around the hole, but do it gently—create a neat, clean opening without damaging more of the structure. Then you’ll want to remove any loose or rotten fiberglass layers inside and outside. This ensures your fill material will stick firmly.

After removing fiberglass layers, you should wipe the area with acetone to remove dust, oils, or leftover paint that could prevent adhesion.

Next, sand the edges with medium‑grit paper to give the repair material something to bite into. Then switch to fine grit to smooth the transition. The goal: a surface that allows the repair to blend in later.

4. Mix, Fill, and Layer

Follow the kit instructions carefully—either for fiberglass or for Bondo. Mix the resin or filler with its hardener, ensuring you get the correct consistency. Too runny, and the mix might leak; too stiff, and it’ll be hard to work with.

Apply the first thin layer to the inside of the hole. Let it dry fully—depending on the product, that might take from minutes to an hour. Once cured, sand it smooth. Repeat the process, building multiple layers until the hole is fully sealed and the surface is even with the skin of the hull.

5. Achieve a Seamless Finish

With the layers built up, sand the outside again using fine grit. Your goal: a perfect transition between the repair and the surrounding surface. If you’re aiming for that seamless finish, now’s the time.

Once sanded smooth, apply a thin coat of matching paint or gel‑coat. Multiple light coats work better than one heavy one—they help avoid runs or drips. Let each coat dry fully before applying the next. Finish with a fine‑grit sand and polish if needed, to match the shine on the rest of your ski.

6. Final Checks—Inside and Out

After everything’s dry, take a moment to check inside the hull again. Make sure there’s no tackiness, no lumps—just a smooth, solid repair.

Then, flush the hull gently—either with fresh water or a mild soap rinse. Run your hand over the repair inside and outside; if everything feels solid and smooth, you’re good to proceed.

7. Prevent Future Damage

To prevent your jet ski from getting further damage, you should:

• Always cover your jet ski when not in use—UV exposure weakens paint and gel‑coat.
• Watch for glitches: tiny cracks often spread over time if untreated.
• Inspect after each ride for new chips or damage, especially if you’ve run close to docks, rocks, or trailer rails.
• Service your jet ski regularly
• Consider applying a clear protective coat—an added barrier between your ski and bumps.

When Should You Call a Professional?

While many jet ski hull repairs can be handled at home with fiberglass kits, Bondo, and a little patience, there are times when bringing in a professional is the safest choice. If the damaged area is larger than a few inches, spreads across seams, or involves multiple cracks that extend beyond the hull surface, DIY fixes might not be enough. A certified Sea‑Doo or watercraft repair specialist can properly assess structural damage, ensuring the integrity of your ski is fully

restored.

You should also call a professional if water has made its way inside the jet ski, affecting the engine or electrical connections. Attempting to fill and seal holes without addressing hidden damage can lead to bigger problems down the line, especially when layers of fiberglass have been compromised. A shop can also provide a seamless finish—matching paint perfectly, rebuilding the hull, and restoring your ski so it looks and rides like new.

Finally, if you’ve removed parts, replaced hardware, or added aftermarket upgrades, professionals ensure that every coat, line, and cover aligns correctly. In these cases, paying for expert help saves time, avoids costly mistakes, and gets you back on the water with confidence.

How Much Does Professional Jet Ski Repair Cost?

The cost to repair a hole in your jet ski professionally can vary depending on the size of the damaged area, the type of watercraft, and the finish you want. For small cracks or minor fiberglass work, you can expect to pay anywhere from $150 to $300. Larger holes that require rebuilding layers of the hull, applying a new coat of gel or paint, and sanding for a seamless finish can range between $400 and $800.

If water has seeped inside the ski and damaged the engine, electronics, or other connections, costs can climb quickly—sometimes exceeding $1,000. Specialty models like Sea‑Doos or high‑performance PWCs may cost more due to proprietary parts and matching color schemes.

Professional shops typically provide a full review of the damaged area, mix and apply

high‑grade fiberglass or Bondo, and ensure the coat blends perfectly with the original paint. This added expertise saves you time and ensures the repair lasts, giving you peace of mind before your next ride.

Get Connected to Professional Jet Ski Repair

Fixing a hole in your jet ski may sound tricky, but with patience and methodical steps—clean, cut, sand, mix, fill, sand, coat, check—you’re fully equipped to bring your ride back to life. Whether that hole appeared because of rocks, trailer collisions, or something unexpected mid‑ride, your ski deserves the same care you expect from it—ready to glide.

If you don’t feel ready to tackle jet ski hull repair on your own, Jet Tek Water Sports is here to help. Our marine mechanics are trained and skilled in repairing all types and sizes of holes. Contact us today for more information on how to get started.

Frequently Asked Questions (FAQ)

1. How can I tell if my jet ski has hidden water damage?

Even if there’s no obvious hole or cracks, trapped moisture inside the hull can cause serious issues. Signs include musty smells, corrosion on connections, or sluggish acceleration during your ride. You can check by removing the hood or cover and inspecting for damp insulation, rusted threads, or water pooling inside.

2. Do I need to replace the entire hull if the damage is bad?

Not necessarily. Even larger damaged areas can often be rebuilt using layered fiberglass and a protective coat, as long as the structural integrity hasn’t been compromised. However, if the hull has extensive fractures or delamination, a full replacement may be safer and more cost‑effective in the long run.

3. Can I still ride my jet ski with a temporary patch?

It’s risky. While there are quick fixes like marine tape or sealant, they’re not designed for lasting repairs, especially when water pressure builds at higher speeds. Riding with a temporary patch can worsen the hole or cracks and allow more water inside, leading to bigger repairs later.

4. How long does a professional jet ski repair usually take?

For small fixes, a repair shop can often turn it around in one to two days. More complex cases that involve multiple layers, color‑matched paint, or engine connections might take a week or more—especially during peak jet ski season when shops are busy.

5. What’s the best way to prevent hull damage in the future?

Always load and unload your ski carSet featured imageefully from its trailer, avoiding sharp edges or rocks. Use a fitted cover when storing it to protect the hood and coat from UV rays. Regularly check for small chips, cracks, or missing paint, and repair them early before they become bigger problems.