Molded Hose 18-71337 | Marine Circulating Pump Hose | Sierra

Molded Hose | Marine Circulating Pump Hose | Sierra 18-71337 

Molded Hose | Marine Circulating Pump Hose | Sierra 18-71337

SIERRA Molded Hose 18-71337

• Sierra molded hose
• For specified Mercruies and OMC GM 4.3L, 5.0L, and 5.7L engines
• 1 3/4 in. inside diameter
• 12 3/4 in. long
• Replaces Mercury 32-33189, 32-861590A05, 32-861590A2, 32-861590A1, and 32-806825
• Replaces Mallory 9-44052

Additional Information

Optimize Your Engine with the Sierra 18-71337 Molded Hose

Maintaining a marine engine requires high-quality parts to ensure safety. Therefore, the Sierra 18-71337 Molded Hose is an essential component for your cooling system. This specific hose connects the thermostat housing to the circulating water pump. Because it is a molded part, it fits perfectly without the need for excessive stretching. It is designed to handle the unique demands of the marine environment. Consequently, boaters choose this hose to prevent engine overheating during long trips.

Expert Design and Durable Construction

The Sierra 18-71337 Molded Hose features a robust design that resists heat and pressure. For instance, the hose has an inside diameter of 1 3/4 inches. Additionally, the overall length measures 12 3/4 inches. These dimensions ensure a secure fit for GM-based engine blocks. Since it is made from premium rubber, it withstands the constant vibration of a running motor. Moreover, the molded shape allows for tight bends without kinking. This keeps the water flowing freely to protect your engine's internal parts.

Broad Compatibility for Common Marine Engines

One of the best features of this hose is its wide range of applications. Specifically, it is built for 4.3L, 5.0L, and 5.7L engines. It is a direct replacement for many original equipment manufacturer (OEM) parts. For example, it replaces the Mercruiser 32-87108 and 32-33189. Furthermore, it is compatible with OMC and Volvo Penta cooling systems. Because of this versatility, it is a staple for marine mechanics. You can trust it to match the performance of your original factory hose.

Why Choose Molded Hoses Over Generic Options?

Generic hoses often struggle with the complex angles found in boat engines. However, the Sierra 18-71337 Molded Hose is shaped specifically for your cooling path. This pre-molded design eliminates the stress on connection points. In addition, it reduces the risk of the hose slipping off during high-speed operation. Since it is engineered for marine use, it also resists salt and chemical degradation. Ultimately, choosing a molded part saves you time during installation and provides better peace of mind.

Reliable Cooling for Long-Term Performance

A leaking hose can lead to a costly engine failure in minutes. Thus, proactive replacement is a smart maintenance strategy. By installing the Sierra 18-71337, you ensure your cooling system remains airtight. Sierra is a leader in aftermarket marine parts for a reason. Their products meet or exceed the standards set by original boat builders. Therefore, you get professional-grade reliability at a more affordable price point. Keep your engine running cool and enjoy your time on the water without worry.

Frequently Asked Questions

What engines does the Sierra 18-71337 fit?

This hose is designed for GM-based V6 and V8 engines. It fits most 4.3L, 5.0L, and 5.7L models from Mercruiser, OMC, and Volvo Penta.

What are the dimensions of this hose?

The hose has an internal diameter of 1.75 inches. The total length of the component is 12.75 inches.

Is this hose a direct replacement for Mercruiser parts?

Yes, it replaces several Mercruiser numbers, including 32-87108 and 32-33189A1. It is built to OEM specifications for a perfect fit.

Does the kit include hose clamps?

Generally, the hose is sold individually. You should inspect your current clamps and replace them if they show signs of rust or wear.