Part Number: 47-3570
Sierra 18-3570 Water Pump Kit
Restore dependable cooling system performance with the Sierra 18-3570 Water Pump Kit. Designed as a high-quality replacement for select marine engine applications, this kit provides the essential components needed to maintain proper cooling water circulation and protect your engine from overheating.
The water pump system is critical to maintaining safe engine operating temperatures. Over time, impellers, seals, and internal pump components can wear from heat, debris, and continuous operation in harsh marine environments. Replacing worn cooling system components at recommended service intervals helps restore reliable water flow and reduce the risk of costly engine damage.
Manufactured using durable marine-grade materials, the Sierra 18-3570 water pump kit is engineered to meet or exceed OEM specifications for dependable fitment and long service life. Designed for both freshwater and saltwater applications, this kit delivers reliable performance for a wide range of sterndrive and inboard marine engines.
Common Engine Fitments
The Sierra 18-3570 water pump kit is commonly used on select marine engine applications, including:
- MerCruiser 4.3L V6
- MerCruiser 5.0L V8
- MerCruiser 5.7L V8
- MerCruiser 350 MAG
- Volvo Penta 5.0Gi and 5.7Gi engines
- OMC Cobra 5.0L and 5.7L applications
These engines are frequently found in:
- Sea Ray sport boats and cruisers
- Chaparral bowriders and cuddy cabins
- Four Winns Horizon series
- Regal sport boats
- Crownline performance boats
- Rinker Captiva models
The 18-3570 kit is commonly used in raw water cooling systems where maintaining strong water circulation is essential for engine reliability and consistent operating temperatures.
Fitment may vary depending on engine serial number and water pump configuration, so confirming compatibility with part number 18-3570 before ordering is recommended.
Typical Kit Contents
Depending on production revision, the kit may include:
- Water pump impeller
- Gaskets and seals
- O-rings
- Wear plate components
- Housing hardware and related service parts
Contents may vary slightly by production batch.
Key Features
- High-quality marine water pump kit
- Helps restore proper cooling water circulation
- Designed for MerCruiser, Volvo Penta, and OMC applications
- Marine-grade materials for durability and long service life
- Helps reduce the risk of overheating and cooling system failure
- Direct replacement for straightforward installation
Why Replace Your Water Pump Components?
Worn water pump parts can reduce cooling system efficiency long before complete failure occurs. Routine maintenance helps maintain dependable water flow, protect internal engine components, and reduce the chance of unexpected downtime on the water.
If you’re servicing a compatible sterndrive or inboard marine engine, the Sierra 18-3570 water pump kit delivers dependable cooling performance and OEM-style reliability you can trust.