NAUCO-type self-priming pumps

Nauco Self-Priming Pumps: The Heart of Your Marine Engine's Cooling System

Nauco self-priming pumps are vital components for the proper functioning of your marine engine's cooling system. A failure of this boat pump can have disastrous consequences, leading to engine overheating and costly damage. To avoid problems and ensure maximum reliability, choose genuine Nauco spare parts available at Nautica Basile. With our parts, you can perform lasting repairs and keep your engine running at peak efficiency.

Nautica Basile offers a complete inventory of Nauco self-priming pumps and spare parts, including impellers, mechanical seals, o-rings, and complete overhaul kits. Our inventory is compatible with most inboard engines and generator sets used in the marine environment. Find the specific model for your boat and ensure efficient cooling, preventing overheating and ensuring trouble-free boating. Invest in the quality and safety of your engine with genuine Nauco spare parts.

Why choose genuine Nauco spare parts from Nautica Basile?

* Maximum Reliability: Nauco parts are designed and built with high-quality materials to withstand the most extreme marine conditions, ensuring long life and consistent performance.
* Perfect Compatibility: Nauco parts are designed specifically for original pumps, ensuring easy and quick installation, without the need for modifications or adaptations.
* Superior Durability: Made with corrosion and wear-resistant materials, Nauco parts offer superior durability compared to non-genuine alternatives, reducing the need for frequent replacements.
* Optimal Performance: Genuine Nauco parts guarantee the same performance as the original pump, maintaining the efficiency of the cooling system and preventing engine overheating.

The Nautica Basile Workshop Advice

The impeller is a critical component and subject to wear. We recommend checking it regularly and replacing it at least once a year or every 200 hours of navigation, even if it does not show obvious signs of damage. A periodic check and preventive replacement will avoid costly repairs and unpleasant inconveniences during navigation. Do not underestimate the importance of an impeller in good condition for the safety and reliability of your engine. A properly functioning marine pump is crucial.

• Fast and secure shipping throughout Italy.


• Satisfaction guarantee: if you are not satisfied, we will refund you.


• Specialized technical assistance before and after sales to help you choose the correct spare part.


• Only genuine Nauco parts from official distributors to guarantee maximum quality.

If you need to replace the complete pump, carefully evaluate the condition of the suction and delivery hoses. Worn or damaged pipes can cause leaks and malfunctions, compromising the efficiency of the cooling system. Also, regularly check the condition of the seawater filter to prevent impurities from entering the pump, which could damage the impeller and other internal components.

FAQ - Frequently Asked Questions about Nauco Self-Priming Pumps

Is this Nauco self-priming pump compatible with my Yanmar 3YM30 engine?

To check compatibility with your Yanmar 3YM30 engine, we recommend that you check the original code of the pump currently installed and compare it with the codes shown in the product description. Alternatively, you can contact our customer service by providing the model and serial number of your engine. We will be happy to help you identify the correct spare part.

How often should I replace the impeller of the Nauco seawater pump?

The seawater pump impeller is a component subject to wear and should be replaced at least every year or every 200 hours of navigation, even if it does not show visible damage. The rubber tends to dry out, lose elasticity and crack over time, reducing the efficiency of the pump and increasing the risk of engine overheating. Preventive replacement is essential to avoid problems at sea.

What type of grease should I use to lubricate the new impeller before installation?

To lubricate the new impeller before installation, it is essential to use a silicone grease specifically for marine applications. Absolutely avoid petroleum-based greases, which could damage the impeller rubber and compromise its durability. Silicone grease protects the impeller from corrosion and facilitates its insertion into the pump.

What should I do if the Nauco self-priming pump does not draw water correctly?

If the Nauco self-priming pump does not draw water correctly, first check that there are no obstructions in the suction pipe or seawater filter. Also check that the impeller is in good condition and that it does not show damage or excessive wear. Make sure that all connections are tight and that there are no air leaks. If the problem persists, it may be necessary to replace the pump or consult a specialized mechanic.

Where can I find the original code of my Nauco self-priming pump?

The original code of your Nauco self-priming pump is generally printed on an identification plate on the pump body itself. Alternatively, you can consult the engine manual or contact the engine manufacturer to obtain this information. Having the original code is essential to identify the correct spare part and ensure compatibility.

Is this Nauco self-priming pump compatible with my Yanmar 3YM30 engine?

To check compatibility with your Yanmar 3YM30 engine, we recommend that you check the original code of the pump currently installed and compare it with the codes shown in the product description. Alternatively, you can contact our customer service by providing the model and serial number of your engine. We will be happy to help you identify the correct spare part.

How often should I replace the impeller of the Nauco seawater pump?

The seawater pump impeller is a component subject to wear and should be replaced at least every year or every 200 hours of navigation, even if it does not show visible damage. The rubber tends to dry out, lose elasticity and crack over time, reducing the efficiency of the pump and increasing the risk of engine overheating. Preventive replacement is essential to avoid problems at sea.

What type of grease should I use to lubricate the new impeller before installation?

To lubricate the new impeller before installation, it is essential to use a silicone grease specifically for marine applications. Absolutely avoid petroleum-based greases, which could damage the impeller rubber and compromise its durability. Silicone grease protects the impeller from corrosion and facilitates its insertion into the pump.

What should I do if the Nauco self-priming pump does not draw water correctly?

If the Nauco self-priming pump does not draw water correctly, first check that there are no obstructions in the suction pipe or seawater filter. Also check that the impeller is in good condition and that it does not show damage or excessive wear. Make sure that all connections are tight and that there are no air leaks. If the problem persists, it may be necessary to replace the pump or consult a specialized mechanic.

Where can I find the original code of my Nauco self-priming pump?

The original code of your Nauco self-priming pump is generally printed on an identification plate on the pump body itself. Alternatively, you can consult the engine manual or contact the engine manufacturer to obtain this information. Having the original code is essential to identify the correct spare part and ensure compatibility.