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Seakamp Engineering
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For MerCruiser engine owners, maintaining optimal operating temperatures is paramount to engine longevity and performance. An often-overlooked yet critical component in achieving this is the oil cooler. The Seakamp 5-inch MerCruiser Oil Cooler (Part Number: 63831A3) stands out as a premium, reliable, and highly efficient cooling solution specifically engineered for your MerCruiser power plant.
Your MerCruiser engine's oil not only lubricates moving parts but also plays a vital role in dissipating heat generated during operation. Without an effective oil cooler, engine oil can overheat, leading to:
Reduced Lubrication Effectiveness: Overheated oil thins out, losing its ability to properly lubricate critical engine components, increasing friction and wear.
Accelerated Oil Degradation: High temperatures break down the additives in your engine oil faster, leading to premature oil changes and potential sludge buildup.
Increased Engine Wear: Insufficient cooling can lead to excessive heat, causing components to expand beyond their normal tolerances, resulting in premature wear and potential engine damage.
Decreased Fuel Efficiency: An overheated engine works harder, potentially consuming more fuel.
Shortened Engine Lifespan: Ultimately, consistent overheating can significantly reduce the overall lifespan of your expensive MerCruiser engine.
The Seakamp 5-inch MerCruiser Oil Cooler directly addresses these concerns, ensuring your engine oil maintains its ideal operating temperature, protecting your investment and maximizing your time on the water.
Seakamp is a trusted name in marine heat exchange solutions, known for manufacturing high-quality, durable, and reliable components. The Seakamp 5-inch MerCruiser Oil Cooler (63831A3) exemplifies this commitment to excellence.
Key Features and Benefits:
Optimal Dimensions for MerCruiser Engines:
5-inch Length: Precisely engineered to fit a wide range of MerCruiser engine configurations.
2-inch Bundle Diameter: Ensures efficient heat transfer within a compact design.
Superior Heat Transfer Efficiency: Designed with advanced internal baffling and high-grade materials to maximize the transfer of heat from the engine oil to the cooling water, maintaining ideal oil temperatures even under demanding conditions.
Durable Construction for Marine Environments: Built to withstand the harsh realities of marine use. The robust construction resists corrosion from saltwater and freshwater, ensuring long-lasting performance and reliability.
Direct Replacement for OEM Part: This Seakamp oil cooler is a direct, high-quality replacement for Mercury/Quicksilver Part Number 63831A3. This ensures a hassle-free installation process with no modifications required, saving you time and effort.
Extends Engine Life: By effectively cooling your engine oil, this oil cooler helps to prevent premature wear, maintain oil viscosity, and reduce thermal stress on critical engine components, ultimately extending the lifespan of your MerCruiser engine.
Maintains Engine Efficiency: Keeping your oil at optimal temperatures allows your engine to run more efficiently, potentially improving fuel economy and consistent power output.
Peace of Mind on the Water: Investing in a high-quality oil cooler like the Seakamp 63831A3 provides the confidence that your MerCruiser engine is adequately protected, allowing you to focus on enjoying your boating experience.
Product Name: Seakamp 5-inch MerCruiser Oil Cooler
Seakamp Part Number: 63831A3
Length: 5 inches
Bundle Diameter: 2 inches
Replaces OEM Part Numbers: Mercury/Quicksilver 63831A3
Application: Specifically designed for MerCruiser engines (verify compatibility with your specific engine model)
While the Seakamp 5-inch MerCruiser Oil Cooler is a direct replacement, professional installation is always recommended to ensure proper fitment and leak-free operation. Regular inspection of your oil cooler and its connections for signs of corrosion, leaks, or damage is crucial for preventative maintenance. Consult your MerCruiser engine's service manual for specific maintenance schedules and recommendations.
Don't compromise on the health and performance of your MerCruiser engine. The Seakamp 5-inch MerCruiser Oil Cooler (63831A3) offers superior cooling performance, exceptional durability, and a perfect OEM fit, making it an essential upgrade or replacement part for any MerCruiser owner seeking to protect their investment and ensure countless hours of trouble-free boating.
Order your Seakamp 5-inch MerCruiser Oil Cooler today and experience the difference in engine performance and longevity!

Would have been 5 stars but, I did not receive a promotional sticker with my $2000 drive unit. Just kidding, everything was great!
Great company to work with!
Ordered a Piranha Propellers Complete A-Series 4 Blade Propeller from Macomb Marine Parts and even though we’re international, it arrived in just over a week — fast and reliable service. The propeller itself is a real lifesaver. We had the same model before, and after hitting a rock that damaged two blades, we were able to swap them right on the water and make it back to the marina without issue — something you simply can’t do with a regular aluminum prop. For peace of mind we decided to buy a complete new set (hub and blades) since an impact like that could cause hidden damage, but the system really proved its worth.
3 in. Exhaust Elbow | Pleasurecraft R029001
Excellent part.
I couldn’t find a Piranha propeller dealer near me in Canada but found Macomb Marine Parts who could deliver to me. The order process was smooth and I was even contacted via email for clarification regarding blade shape and they were very helpful in choosing the best shape for my purposes.
I can’t comment on the prop’s performance yet as we haven’t had the boat in the water yet.
Perfect replacement. thank you
Perfect replacement
Perfect match to the original Chris Craft blue. Competitive price and delivery was quick
Great Product, easy to install, work well
Obtaining magnesium anodes to install on the OMC Cobra (SX-C) sterndrive, for fresh water use. Received the anode within a week of ordering the part, which is not going to be installed until Spring.
Black Liquid Electrical Tape - 4 oz. | Star Brite 084104B
As described
Very Happy!! Just what I needed!!
Outdrive spent 4 months docked in salt water with no visible rust on the stainless steel braided hoses
Would have been 5 stars but, I did not receive a promotional sticker with my $2000 drive unit. Just kidding, everything was great!
Great company to work with!
Ordered a Piranha Propellers Complete A-Series 4 Blade Propeller from Macomb Marine Parts and even though we’re international, it arrived in just over a week — fast and reliable service. The propeller itself is a real lifesaver. We had the same model before, and after hitting a rock that damaged two blades, we were able to swap them right on the water and make it back to the marina without issue — something you simply can’t do with a regular aluminum prop. For peace of mind we decided to buy a complete new set (hub and blades) since an impact like that could cause hidden damage, but the system really proved its worth.
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