Knowing your fuel tank size is necessary to fill it with the right amount. In case of a spill, it’s not just about wasting fuel; there is also the matter of exposing ourselves to unnecessary danger. Fortunately, it’s easy to learn how to find out your boat gas tank size.
Referring to your boat manual or placard on the tank is the easiest way, but there are other methods if these are unavailable. Let’s cover a couple of them below.
Keep reading to learn more.
Table of Contents
Ways to Find Out Your Boat Gas Tank Size
How Big is My Gas Tank? Two Ways to Find Out
The easiest way to find out how much fuel your tank can hold is to check the vessel’s owner manual for information. If you don’t have one on hand, you can also check the fuel tank, which may have that information printed somewhere on its body.
However, there may be instances where this information is unavailable, and you must determine the figure yourself. There are a couple of ways you can get it.
How Many Gallons of Gas Does a Boat Hold on Average?
Boats have an average boat gas tank size of 40 gallons, but the range begins at around 5-10 GL for small boats, while yacht gas tank size allows up to 350,000 GL.
Let’s look at a few types of vessels and see how much fuel certain models of 20 ft boat hold.
- The SunDeck Sport 201 IO Hurricane deck boat gas tank size allows for 47 GL, while the MasterCraft 2023 ProStar ski boat carries only 30 GL.
- Even watercraft belonging to the same category may differ significantly in their capacity. A center console boat like the Yamaha 195 FSH Sport maxes out at 40 GL, while Bayliner’s T20CC and T20CX both top out at 55GL.
- Bass boat gas tanks usually range between a 25 to 50 GAL For instance, the Skeeter ZX200 has a gas capacity of 36 GL.
- Pontoon boat gas tank size ranges from 20 to 35 GL. However, some Pontoon gas tank size can go as low as a mere 5 GL since these are typically for lounging and not actual boating.
Frequently Asked Questions
Why is it important to know your boat’s gas tank size?
The amount of fuel you have directly affects how long your vessel can operate, and knowing the tank size means maximizing its potential. This requires you to learn how to know the size, find the exact figure, and plan your activity well to make the most of any craft.
What are the types of gas tanks?
The two basic types of gas tanks are permanent and portable.
- Portable ones are those that can be disconnected and even swapped out. However, these usually have a lower capacity—around 5 GL.
- Permanent are those fixed to a spot on the boat, usually on or below deck, and can hold 10 GL and up. It is common for larger vessels to have multiple of these.
How do you calculate the size of a boat’s gas tank?
Aside from running your boat fuel tank’s dimensions through a boat fuel tank size calculator, you can make the calculations yourself. For example, the formula for calculating the volume of a rectangular tank is multiplying its length, width, and height.
This yields your tank’s volume in cubic feet. Convert it to gallons for the standard unit of measurement used in measuring boat fuel capacity. Do so by multiplying the resulting volume by 7.48.
How do you check a gas tank on a boat?
Finding out your boat tank’s size by measuring it requires you to have full access to it. Portable tanks are easy to measure as you only need to disconnect them to take their dimensions. However, a fixed tank can be problematic.
If you can’t access enough of the tank to measure it, use the first method (filling an empty tank and calculating the volumes of fuel used) instead.
Now you know how to find out your boat gas tank size even without access to the owner’s manual. You’ll notice that the boat’s manual contains a lot of essential information, so keep it in a safe place and don’t lose it.
What other measurements or calculations do you know of that are necessary to make when the owner’s manual goes missing? Tell us your suggestions in the comments section below.
Remember to boat safely.
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