WaterDog Outboard Savers

09/05/2026

10% discount on corrosion protection this Labor Day weekend with coupon code: "no-scale". Get protected!

If you're tired of seeing scale buildup in your motor and you like saving money, this weekend is your weekend! After you add to the cart and go to checkout you will see a spot for coupon code, simply type in "no-scale" for a 10 % discount ending Monday at midnight.

Every person who uses our anode is shocked on their first inspection. The most common feedback I hear is, "I will be using this anode forever", because it just works. If you don't like it or don't think it works, return it for a FULL REFUND.

If you stop the corrosion, you stop the scale, why wait?

Winter maintenance season is right around the corner, and our simple little anode can add years of life to your motor while giving you better performance over that time.

Give your engine the sacrificial anode it needs so it stops dissolving, it will thank you, and so will the next buyer!

Orders shipped daily, Made in USA 🇺🇸🇺🇸💪💪

08/31/2026

What does cathodic protection mean? Simply, turning a corroding anode into a cathode.

When dissimilar metals share an electrolyte (outboard cooling water), the less noble metal tends to give up electrons and becomes the anode. The more noble metal receives those electrons and acts as the cathode.

In order to protect the corroding metal you have to introduce a third metal that is less noble (more reactive) than the corroding metal, this is called a sacrificial anode. If the sacrificial anode does not have More surface than the cathode, it cannot fully protect the system.

The thermostat in your engine is the cathode and your engine is acting like an anode along with the OEM anodes. The engine is not cathodically protected by the OEM anodes because they are smaller than thermostat, and far from it. So they give up some electrons but not enough to cover the entire surface of the thermostat which is why you see scale forming.

When you install our anode it is placed in the thermostat outlet and it has more surface area than the thermostat itself. Our anode is able to give up enough electrons to switch the galvanic potential from the engine to our anode. Our anode is able to supply your engine with electrons as well, turning it from an anode losing electrons, to a cathode gaining electrons. That is cathodic protection.

You can see the polarity in the block flip after installing our anode because of the change in galvanic potential. the negative polarity represents the engine losing electrons into the water towards the thermostat and the positive polarity represents the engine gaining electrons from my anode.

Without question the way to make your engine live as long as possible is to install our anode, it's cheap and it's easy and you will love it or you'll get your money back.

We Corrode, So Engines Don't! Orders shipped daily 💪🇺🇸

WaterDog's Thermostat Anode stops all corrosion created by electrolysis at the thermostat. The only marine-grade Anti-Corrosion solution your engine ever needs!

08/30/2026

A clean engine is a cool engine, and a cool engine lives longer. Our anode keeps your cooling system clean.

There are really two paths: your engine metal corrodes and that corrosion becomes the foundation for scale buildup, or you give the system enough sacrificial anode surface area so the anode takes the hit instead.

That scale cannot simply be rinsed away with water. Once it builds up, you’re left trying to remove it with acid. The other option is to attack the problem at the source and prevent scale from forming in the first place.

You cannot stop the chemistry reaction from happening, what you can do is control which metal corrodes. That means providing enough sacrificial surface area to corrode first and saturate the thermostat surface turning the engine metal from an anode to a cathode.

Use the chemistry to your advantage. That’s what WaterDog does.

We Corrode So Engines Don’t, Orders shipped daily. 🇺🇸💪

08/29/2026

Our anode will be "catching" the scale so it doesn't form in your motor, keeping your cooling system clean.

More accurately, our anode corrodes and the corrosion is what the scale is caused by, minerals don't easily stick to clean metal as they flow quickly through the engine, 5.4 GPM at idle. You can think of it like a filter for the scale in a way. You can see that the housing was clean after removing the anode, because the housing wasn't corroding.

When you remove the anode you're going to pull the scale out because it sticks to the anode the same way it would stick to the inside of your engine. The minerals build up on top of the scale easily but they don't build up on fresh clean metal easily and that's how you keep your cooling system clean with our anode.

It's similar to a filter system because the scale forms on the anode instead of your motor internals and then you remove the scale with the anode when you install the new one, similar to changing a filter.

Now go out there and enjoy one of the last few weekends of the year if you're up north, and don't forget to order your WaterDog Thermostat Anode for winterizing.

Happy boating!

08/25/2026

Good mechanics recommend annual anode replacement, Great Mechanics recommend WaterDogs Anode!

Outboard OEM anodes corrode extremely fast because of their high surface charge density. If you divide the total charge of the surface in coulumbs by the total surface area the charge is spread through in meters squared you get the surface chart per square area (C/M²).

As a result of the OEM anodes having so much less surface area than the thermostat, it spikes the charge of the anode and they corrode quickly. They are giving up their maximum electrons per second but they are not able to give up enough electrons to protect the engine from corroding which is why the corrosion 'scale' forms everywhere.

WaterDog's Anode has the surface area required to saturate the surface of the thermostat which is why it protects your motor and the oem anodes as well. Some tests have shown that the OEM anodes will last upwards of 500 hours using WaterDog's Anode, possibly longer with proper WaterDog replacement intervals.

The reason why the corrosion scale will tend to have a more yellowish color inside your engine than you see when you remove the anodes is because we are looking at the backside of the corrosion when removing the OEM anode. The base level of corrosion closest to the surface of the metal will mainly be engine metal hydroxides which tend to be whiter in color. The internal side of the hydroxide allows the deposition of minerals from the biofilm in the cooling water. These minerals begin to precipitate or grow out into the water jacket but they also change the coloration of the corrosion 'scale' and contribute to improper cooling.

All of this stuff is testable, it's easy to weigh your block and nodes after running a 100 hours using mine and see that they haven't corroded and they still weigh essentially the same (5% Mass loss per 100 hours or so). You can also use your multimeter before and after installing our anode and you will see the polarity in your motor flip.

If you don't think it works or if you're just unhappy you will get your money back. You're gonna love it, I guarantee it.

We Corrode, So Engines Don't! Orders Shipped Daily. 🇺🇸💪

08/21/2026

Repowering a twin engine rig can be daunting, adding an anode to your motor is much cheaper and easier.

You will know it works the first time you inspect it and you will be happy that I kept pestering you about it when you tell the future buyer you've been using the WaterDog anode the entire time and you get the highest possible value.

It's being adopted by mechanics around the world for a reason, it just works.

08/18/2026

Let engine 'scale' form on our anode instead of your Outboard, and it will live longer. We corrode, o engines don't!

We offer a money back guarantee because the anode just works and you will see that. You can test it with a multimeter, you can weigh the block anodes before and after or you can just inspect it.

When you remove the anode the corrosion scale sticks to it and comes out as well. Remember, the engine scale is a corrosion reaction that bonds to the surface of the metal. Some of it flows through the system and out but some gets stuck at the surface.

Because our anode corrodes instead of your engine the scale will form and stick to our anode and not your engine metal, then when you replace it you are physically removing the scale and that is how your engine will live longer.

Most people say they will be using our anode as a regular maintenance item moving forward and it will eventually be considered routine maintenance by everyone. The sooner you install it, the better off your outboard will be.

There is no question that our anode will make your engine live longer, the only question is are you willing to try it to find out?

Long live all motors!! Made in USA 💪🇺🇸

08/17/2026

The best thing you can do for your outboard is keep the cooling system free from scale, ideally stop it from forming.

Nothing else on the market designed to prevent marine scale from forming inside the cooling system the way our Thermostat Anode does.

The longest living motors today are regularly cleaned with acid which removes the scale buildup. We have seen repeated acid use has its own risks to the metal, not to mention, a bottle of descaler costs more than our anode. WaterDog is designed to stop the galvanic corrosion process that create that scale in the first place, you don't have to clean it if it never forms.

We don’t have decades of direct engine-life data yet, but the evidence is pointing in one direction: the motors being protected from new will be the ones that last the longest. Think about how many outboards need replacement because of low compression, head-gasket failures, or cooling-related damage. Scale-filled cooling systems are often the root cause of these failures.

Dealerships and boat owners installing WaterDog on new engines today are going to see hours that are unheard of today.

It's not a slogan, it's a fact. We Corrode So Engines Don't!

Long live all motors. Orders shipped daily. 🇺🇸💪

WaterDog's Thermostat Anode stops all corrosion created by electrolysis at the thermostat. The only marine-grade Anti-Corrosion solution your engine ever needs!

08/08/2026

Did you know the ocean could be this flat offshore? Loggerhead lighthouse key was a special experience.

We were extremely lucky 3 years ago and the ocean was pure glass from key West to the dry Tortugas. It was hard to believe how calm the water was.

This was the one trip she made before the JB welded hole started leaking, I was extremely lucky the engine did not inject water into the intake on this trip and ultimately why I became so passionate about helping people repair corrosion failures properly, so the boat can stay on the water.

Just a reminder that the substance you see inside the cooling passages and the thermostat housing is not sand or salt, it's corrosion from the engine. It's possible some sand gets sucked into the motors but will flow through the system and ultimately out of the riser and exhaust.

It is possible some sand lodges in places I'm sure, but what you see bonded to the walls is not sand. The X-ray diffraction testing tentatively showed hydrotalcite, that was because aluminum hydroxide and magnesium hydroxide were the two most common metal hydroxides. I highly recommend taking a sample to a lab and testing it yourself and you will see its metal corrosion from your motor and minerals from the water.

Our anode is the solution, it will corrode instead. 🇺🇸💪

08/05/2026

What mechanism causes engine performance loss? How exactly does WaterDog's Anode help maintain it?

Engines operate by converting thermal energy of combustion into kinetic energy that drives the crank shaft. The piston rings are what seals the piston to the cylinder wall and when new allow very minimal combustion to get past the rings into the crank case. Over time, the piston rings gradually wear down the cylinder walls and allow some of the combustion to pass by them escaping into the crank case, this is known as blow by, more blow by leads to less compression and less thermal energy converting into kinetic energy.

Under normal conditions the top of the cylinder wall wears the most, and that has to do with the Piston changing directions at the top of the travel as well as less oil film maintaining the lubricity of the cylinder wall near the top. This lubricity challenge is exacerbated by uneven cooling of the cylinder wall. Generally, an engine can maintain acceptable compression for many thousands of engine hours if there are no component failures or overheating events, (semi's can see 25,000 hours).

One of the main drivers of excess wear is uneven cooling, which is why boat motors lose compression faster than other industries. You will often hear people claim boat motors lose compression faster because they are under a higher load, but that doesn't explain why some boat motors can see well over 10,000 hours and others die before a thousand hours. That is explained by engine scale causing uneven cooling which generates hot spots and uneven thermal expansion. Even while moving large volumes of water, the engine can slowly develop extremely uneven cooling. An engine with less corrosion scale will live a longer life than an engine with more.

The heat in the engine goes from the combustion chamber into the Piston into the piston ring and then into the cylinder wall and then into the water. The corrosion scale insulates the cylinder wall from the water and affects that heat transfer but it also makes the water flow faster through the engine which gives the water less time to extract heat. This leads to phantom overheating, where the engine is running hot but the water is not extracting that heat so you will get no alarm, this is when you begin to lose compression.

We have discussed how corrosion begins close to the thermostat and as scale builds up in one location, the resistance is increased exposing clean metal, farther away, to begin corroding. Once the metal corrodes a layer of hydroxide it increases resistance, slowing the corrosion but the scale continues getting thicker because minerals begin to deposit into the porous metal hydroxide, which provides a scaffolding for the minerals to deposit heavily.

The wear that is usually limited to the very top of the cylinder wall begins to migrate farther down the cylinder wall. This happens because the thermostat is located in the head closest to the top of the cylinder. As the corrosion scale spreads through the system it reaches the water jacket and starts at the top of the cylinder and works its way down.

This is the reason why you see a lot of older Motors with compression under 100 PSI unable to run higher than 4,000 RPMs. They are always completely full of scale. After cleaning the scale, the cylinder wear cannot be undone without a rebuild.

If your boat motor does not fill up with the corrosion scale it will cool itself as the manufacturer intended indefinitely. This does not mean you will have no compression loss over time but it will be well within the acceptable range as intended by the manufacturer. Reducing the scale dramatically increases the engine life as well as the engine performance over that life.

This is why you want the WaterDog Thermostat Anode, not to save you from a corrosion hole, but to maintain your engine performance over time which ultimately increases engine life and resale value. That's the value of our Anode, your boat stays on the water stronger, for longer.

We Corrode So Engines Don't! Long live all motors! 🇺🇸💪

𝗥𝗲𝘀𝗲𝗮𝗿𝗰𝗵 𝗦𝗼𝘂𝗿𝗰𝗲𝘀:

▪️S. W. Sparrow and T. A. Scherger, “Cylinder Wear, Where and Why,” SAE Technical Paper 360108, 1936.
https://saemobilus.sae.org/papers/cylinder-wear-360108

▪️C. S. Bruce, J. T. Duck and A. R. Pierce, “Effects of Substitute Fuels on Automotive Engines,” National Bureau of Standards Research Paper RP1913, 1948.
https://nvlpubs.nist.gov/nistpubs/jres/041/jresv41n2p135_A1b.pdf

▪️Samuel A. McKee, “An Indentation Method for Measuring Wear,” National Bureau of Standards Research Paper RP1819, 1947.
https://nvlpubs.nist.gov/nistpubs/jres/39/jresv39n2p155_A1b.pdf

▪️C. S. Bradt, Y. Wang, T. Tian, H. Cao and G. Zhu, “Effect of Wet Liner Vibration on Ring-Liner Interaction in Heavy-Duty Engines,” SAE Technical Paper 2023-32-0140, 2023.
https://saemobilus.sae.org/papers/effect-wet-liner-vibration-ring-liner-interaction-heavy-duty-engines-2023-32-0140