What Size Plug Does a Jon Boat Use?

I’ve always had a soft spot for jon boats. Their simplicity, stability, and affordability make them a fantastic choice for both seasoned anglers and weekend boating enthusiasts like me. However, to ensure a smooth and enjoyable experience on the water, it’s crucial to understand the various components of your jon boat, including the ever-important drain plug. So, let’s dive into the question that many of us have pondered: “What size plug does a jon boat use?” In this comprehensive guide, I’ll walk you through the different types of plugs, their sizes, and offer practical tips for keeping your boat’s drainage system in tip-top shape.

Why Do We Need a Drain Plug?

Before we get into the nitty-gritty of drain plug sizes, let’s first grasp their purpose. A drain plug is a deceptively simple yet vital component that prevents water from entering or accumulating in your boat’s hull. Jon boats aren’t typically self-draining, so they rely on these plugs to keep water out. When it’s time to remove water from your boat, you just pull out the plug, and gravity takes care of the rest.

Types of Jon Boat Drain Plugs

There are two main types of drain plugs that we commonly use in our trusty jon boats: threaded and snap-style plugs.

Threaded Drain Plugs

Threaded drain plugs are the more traditional choice. They come with a threaded body that fits snugly into a corresponding hole in the boat’s transom or hull. The threaded design ensures a secure fit, keeping water from sneaking in. These plugs are usually made from materials like plastic, brass, or stainless steel, ensuring durability and resistance to corrosion.

Snap-Style Drain Plugs

Snap-style drain plugs are a newer and more convenient option. They consist of a plug with a rubber or neoprene gasket that fits into a hole in the transom. The plug is secured with a snap-style mechanism, making installation and removal a breeze. Many folks prefer snap-style plugs for their user-friendly design and reliable sealing capabilities.

Determining the Correct Plug Size

Now, let’s tackle the main question: “What size plug does my jon boat use?” The size of the drain plug you need depends on the diameter of the hole in your boat’s transom or hull. To find the right size, follow these steps:

Measure the Hole Diameter

Take out your measuring tape or caliper and carefully measure the diameter of the hole where the drain plug goes. Precision is key here, as using the wrong-sized plug could lead to unwanted leaks.

Match the Plug Size

Once you have the hole’s diameter, match it to the appropriate drain plug size. Drain plug sizes typically range from 1/2 inch to 1 inch in diameter, with common sizes being 3/4 inch and 1 inch. It’s crucial to select a plug that fits snugly into the hole without any gaps.

Consider Material and Durability

When picking a drain plug, think about the material it’s made of. Plastic plugs are lightweight and budget-friendly but may not be as robust as brass or stainless steel plugs, which resist corrosion and wear. The choice of material depends on your budget and how often you take your jon boat out on the water

Installing and Maintaining Your Drain Plug


  • For threaded drain plugs, start by threading the plug into the hole by hand until it’s snug, then use a wrench to tighten it further if necessary. Be cautious not to over-tighten, as this can harm the hull.
  • Snap-style drain plugs are even easier to install. Simply insert the plug into the hole, press down, and snap it securely into place. Make sure the gasket creates a tight seal.

Regular Inspection

It’s essential to inspect your drain plug regularly to ensure it’s doing its job correctly. Look for signs of wear, damage, or corrosion. If you spot any issues, don’t hesitate to replace the plug to prevent leaks.


For threaded drain plugs, consider applying a marine-grade lubricant or silicone grease to the threads before installation. This can help create a better seal and make it easier to remove the plug when necessary.


Keep your drain plug clean and free from debris or dirt, which can impede its effectiveness. After each outing, rinse the plug with fresh water and let it dry before putting it back in place.

Troubleshooting Drain Plug Issues

Even with proper installation and maintenance, you may encounter issues with your drain plug over time. Here are some common problems and their solutions:


If water is entering your boat despite the plug being in place, inspect the plug and the hole for visible damage. Replacing a damaged plug or adding waterproof sealant around the hole can resolve this issue.

Difficult Removal

If your plug becomes challenging to remove due to corrosion or a tight fit, use a penetrating lubricant to loosen it. Patience is key here, so avoid using excessive force to prevent damage.

Lost Plug

Losing your drain plug can be frustrating. Consider keeping a spare plug onboard for emergencies and always double-check that the plug is securely in place before launching your jon boat.


Knowing the size and type of drain plug your jon boat needs is essential for keeping your boating adventures dry and safe. Whether you opt for a threaded or snap-style plug, choosing the correct size and ensuring proper installation and maintenance will prevent water from invading your boat’s hull. By following the guidance in this comprehensive guide, you’ll be well-prepared to enjoy countless hours on the water in your jon boat without a care in the world.