
Sea Pro boat owners may find themselves needing to check their fuel tank from time to time. While some opt for a professional mechanic's opinion, others choose to take matters into their own hands. One such redneck solution involves removing the caulk and popping the hatch under the leaning post for the existing fuel tank. This provides access to the tank, allowing for repairs or replacements. However, it's important to carefully consider any repairs, especially with older boats, as fuel tank issues can be a persistent problem.
| Characteristics | Values |
|---|---|
| Fuel tank repair | "Redneck" fuel tank repair involves removing the caulk and popping the hatch under the leaning post. It is possible to replace the tank with a new one or with a bench seat cushion and plastic beer cozy cup holders. |
| Fuel treatment | For routine maintenance or storage, add 1 ounce of Sea Foam or Sea Foam Marine PRO per gallon of fuel in the tank. For occasional cleaning, add a full can of Marine PRO to a low tank of fuel (1-2 gallons) and run the boat for at least 20 minutes before refuelling. |
| Engine cleaning | For upper engine cleaning, add a full can of Marine PRO to a low tank of fuel for a higher concentration and faster cleaning effect. |
| Parts cleaning | Use a slow cooker to clean parts by adding Sea Foam Motor Treatment, High Mileage, or Marine PRO, and soaking parts for 12-24 hours. Gently brush off loosened contamination and repeat if necessary. |
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What You'll Learn

Removing the caulk and popping the hatch
To check the fuel tank of your Sea Pro boat, you will first need to access the tank. If your boat has a removable hatch under the leaning post for the existing fuel tank, you can do this by removing the caulk and popping the hatch.
Removing the caulk
First, locate the caulk that seals the hatch in place. Caulk is a flexible sealing compound that is used to fill in gaps and create a watertight seal. It is often made of silicone or latex and can be removed with a sharp knife or a specialised tool called a caulk remover.
Once you have located the caulk, use a sharp knife or caulk remover to cut through it, being careful not to damage the surrounding areas. You may need to apply some force to break the seal, but be gentle to avoid scratching or damaging the boat's finish.
Popping the hatch
After you have cut through the caulk, you should be able to pop open the hatch. Carefully pry it open with a flat-head screwdriver or a similar tool, being mindful not to damage the hatch or the surrounding area. If the hatch is difficult to open, you may need to apply some force, but be cautious and gentle to avoid any breakage.
Once the hatch is open, you will have access to the fuel tank and can proceed with your inspection or maintenance. Remember to take the necessary safety precautions when working with fuel and only proceed if you are confident in your abilities. If you are unsure, it is always best to consult a professional or a qualified mechanic.
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Replacing the tank
If you're looking to replace the fuel tank on your Sea Pro boat, there are a few things you can do. Firstly, check if there is a removable hatch under the leaning post for the existing fuel tank. If there is, simply remove the caulk and pop the hatch. Then, find a replacement tank from a supplier like Great Lakes Skipper that fits the dimensions of your Sea Pro, and install it yourself.
If your Sea Pro has an in-deck fuel tank, you may need to consider finding another hull and moving your motor to that. Alternatively, you can install a smaller, above-deck fuel tank. This will require anchoring it down and routing the fuel line under the deck. Remember that a smaller tank will mean more frequent refuelling, so be sure to fill up before each trip!
If you're handy and have the time, you could also consider laying up your own fuel tank. One user on The Hull Truth forum laid up a 100-gallon tank in glass and ethanol-resistant vinyl ester resin for around $120. This is a cost-effective option, but it may not be suitable for everyone.
Finally, consider selling your Sea Pro with the existing fuel tank to someone who is willing to do the work themselves. This could be a good option if you're not interested in doing the work yourself and are looking to upgrade to a new boat.
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Repairing a bad in-deck gas tank
First, you must identify the source of the problem. If there is a fuel leak, check the tank for any holes or cracks. If the tank is made of metal, look out for any signs of rust or corrosion. If the tank is severely damaged or corroded, it may be best to replace it entirely.
If you decide to repair the tank, you will need to drain any remaining fuel and clean the inside of the tank to remove any varnish or residue. You can use a cleaner/degreaser solution mixed with water and ensure that you agitate and rinse the tank thoroughly until the water runs clear. Once the tank is clean and dry, you can apply a suitable sealer to treat the surface and prevent further corrosion. Follow the manufacturer's instructions for the sealer, as some products may require multiple applications or specific curing times.
For a leaking tank, you will need to sand the area around the leak to prepare the surface. Clean the sanded area with alcohol or a degreaser to ensure that the epoxy adheres correctly. Mix the epoxy compound as instructed by the manufacturer, and shape it into a cone with a tip. Insert the tip of the cone into the hole in the tank, and allow it to dry and cure. Once cured, you can refill the tank and check for any remaining leaks.
If you decide to replace the tank, you may need to cut open the deck to access it, depending on the boat's design. This can be a complex process, and you may need to saw through parts of the boat. Ensure that you have the necessary tools and skills to perform this task safely. After removing the old tank, you can install a new one, ensuring it is properly secured, plumbed, and leak-tested. You may also want to replace the foam, plumbing, wiring, and fuel gauge sender at this time. Finally, repair or reassemble the boat's structure, ensuring that the deck is structurally sound.
Remember to exercise caution when working with fuel tanks and always follow safety guidelines. If you are unsure about any aspect of the repair or replacement process, seek professional assistance.
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Selling the boat with the tank
Selling a boat can be a challenging process, especially if you are emotionally attached to it. However, there are several steps you can take to ensure a smooth sale. Firstly, it is crucial to address any mechanical issues and quirks that may deter potential buyers. Make sure to fix any problems, no matter how minor they may seem, as these can significantly impact the attractiveness of your boat. A well-maintained boat is more likely to attract buyers and fetch a higher price.
Before putting your boat on the market, it is essential to make it look its best. A clean and tidy boat is more appealing to buyers and can expedite the selling process. Remove any clutter and give the boat a thorough cleaning, paying attention to every nook and cranny. Consider using scrub brushes and wax to make the boat shine and create a positive first impression. Remember, buyers often make emotional decisions, and a well-presented boat can evoke a stronger response.
When it comes to listing your boat, be as detailed and specific as possible. Include the boat builder's specifications, minimum draft, exact dimensions, on-board equipment, engine hours, tank capacities, accessories, outfittings, and brand names. High-quality photos and videos are also essential. Showcase your clean boat from various angles, both in and out of the water, to give potential buyers a comprehensive view. Consider investing in paid classified ads, as they tend to deliver ten times the exposure of free ads and offer more marketing options, such as larger ads and guaranteed exposure.
If you are selling your boat during the winter, there are a few additional considerations. It is recommended to winterize the boat, acid wash it, and then polish it to perfection. Taking it out of the water and storing it in a barn or similar structure can be advantageous. You can also add fuel stabilizer to the tank and run the boat to ensure the stabilizer reaches the fuel system. This step will ensure that your boat is in optimal condition even during the off-season.
Lastly, be prepared to negotiate and answer any questions potential buyers may have. Be transparent and provide detailed information about your boat's history and any maintenance or repairs carried out. By following these steps, you can effectively sell your boat, even with the fuel tank, and ensure a smooth transition to its new owner.
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Anchoring a smaller tank
To anchor a smaller tank, you'll need to find a suitable location for it on your boat and securely fasten it in place. One option is to use a mechanic to anchor it down and route the fuel line under the deck, as described by a user on The Hull Truth forum. This solution may be more convenient than replacing the in-deck tank, especially if your boat is older.
When choosing a smaller tank, consider your typical fuel usage and ensure that the tank capacity meets your needs. In the example mentioned, the user opted for a 27-gallon tank, which suited their normal usage patterns.
It's important to keep in mind that a smaller tank will require more frequent refuelling, so it's essential to plan your trips accordingly. Always remember to fill up before each outing to avoid running out of fuel during your journey.
Additionally, consider the placement of the smaller tank on your boat. Ensure that it is securely anchored and doesn't obstruct your movement or interfere with other boat functions. Smaller tanks can be a practical solution, offering convenience and flexibility, as long as you're mindful of your fuel levels.
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Frequently asked questions
To check your Sea Pro fuel tank, you will need to remove the caulk and pop the hatch under the leaning post.
If your Sea Pro fuel tank is damaged, you can replace it with a tank of similar dimensions from Great Lakes Skipper.
If you are on a tight budget, you can try to sell your boat with the damaged fuel tank to someone who is willing to do the repair work themselves.
As a temporary solution, you can install an above-deck fuel tank, which will require you to remember to fill up before each trip.
If you have been experiencing issues with your fuel tank for a couple of years, it is likely time to replace it. A qualified mechanic can help you assess the condition of your fuel tank and recommend the best course of action.











































