Engine raw water strainers

Engine water filters are essential components for preserving the integrity of your marine engine's cooling system. They prevent debris, algae, and other impurities from entering the system, preventing overheating and potentially costly damage. We stock Guidi and Osculati filters, designed to withstand the harsh marine environment and guarantee efficient filtration.

Choosing the right filter depends on several factors. The filter's flow rate must be adequate for your engine's horsepower. An undersized filter could restrict water flow, causing a temperature increase. Always verify the fitting diameter to ensure a correct and leak-free connection. Filters with a stainless steel strainer basket are preferable for their corrosion resistance and ease of cleaning.

A common problem is filter clogging, especially in particularly dirty waters. Regularly check the filter and clean the strainer basket to ensure optimal water flow. Failure to maintain the filter can lead to engine overheating and damage to the cooling pump impeller.

The Nautica Basile Workshop Tip

In our workshop, we often see engines with serious damage caused by an inefficient cooling system. The engine water filter is a fundamental, yet often neglected, form of protection. Check your filter regularly, especially after long voyages or in areas with murky waters. A clean filter means a more efficient and longer-lasting engine.

• Fast shipping throughout Italy.


• Official manufacturer's warranty.


• Pre- and post-sales technical support.


• Original and compatible spare parts available.

For complete engine protection, consider adding a quality fuel filter. Clean fuel is essential to prevent injector problems and ensure optimal performance.

FAQ - Frequently Asked Questions

What is the difference between a bronze and a brass filter?

Bronze filters are generally more corrosion-resistant than brass filters, especially in high-salinity marine environments. Both materials offer good durability, but bronze is preferable for prolonged use in harsh conditions.

How do I know which filter is right for my engine?

Check the filter's maximum flow rate (expressed in liters per minute or liters per hour) and compare it to the flow rate recommended by your engine manufacturer. Make sure the filter fitting diameter matches the cooling system hose diameter. If in doubt, consult your engine manual or contact a qualified technician.

How often should I clean or replace my engine water filter?

The frequency of cleaning or replacement depends on the water conditions in which you operate. In general, it is advisable to check the filter every 50 hours of operation or at least once a month. If the water is particularly dirty, it may be necessary to clean the filter more frequently. Replace the filter if you notice any damage or corrosion.

Can I use a generic filter instead of one specifically for my engine?

It is not recommended to use non-specific filters unless they are expressly compatible with your engine model. An inadequate filter may not provide sufficient filtration or may restrict water flow, causing overheating problems. Always use original spare parts or high-quality equivalents.

What is the difference between a bronze and a brass filter?

Bronze filters are generally more corrosion-resistant than brass filters, especially in high-salinity marine environments. Both materials offer good durability, but bronze is preferable for prolonged use in harsh conditions.

How do I know which filter is right for my engine?

Check the filter's maximum flow rate (expressed in liters per minute or liters per hour) and compare it to the flow rate recommended by your engine manufacturer. Make sure the filter fitting diameter matches the cooling system hose diameter. If in doubt, consult your engine manual or contact a qualified technician.

How often should I clean or replace my engine water filter?

The frequency of cleaning or replacement depends on the water conditions in which you operate. In general, it is advisable to check the filter every 50 hours of operation or at least once a month. If the water is particularly dirty, it may be necessary to clean the filter more frequently. Replace the filter if you notice any damage or corrosion.

Can I use a generic filter instead of one specifically for my engine?

It is not recommended to use non-specific filters unless they are expressly compatible with your engine model. An inadequate filter may not provide sufficient filtration or may restrict water flow, causing overheating problems. Always use original spare parts or high-quality equivalents.