Description
DOMETIC Raw Water Pump M18-31604 | Boat Supply Store
Maintain optimal engine operating temperatures in harsh marine environments with this Dometic M18-31604 raw water pump. It is engineered with a robust bronze alloy housing, ensuring superior corrosion resistance in saltwater conditions and providing a minimum flow rate of 15 GPM at 1500 RPM, critical for efficient heat exchanger function. This pump is an essential component for inboard diesel engines on offshore fishing vessels operating in the Gulf of Mexico.
Key Features
- Corrosion-Resistant bronze alloy construction for extended service life.
- High-Flow Performance ensures efficient engine cooling and prevents overheating.
- Reliable Sealing minimizes leaks and maintains consistent pressure.
- Direct Replacement for many common marine engine applications.
- Easy Maintenance with accessible wear components.
- Vibration Dampening reduces noise and stress on the system.
- Compact Design facilitates installation in confined engine spaces.
- Durable Impeller material for long-term operational integrity.
Specifications
| Product Specifications | |
|---|---|
| Material | Bronze Alloy |
| Flow Rate | 15 GPM @ 1500 RPM |
| Port Size | 1 inch |
| Drive Type | Engine Mounted |
| Impeller Material | Neoprene |
Who This Is For
This pump is designed for marine mechanics and boat owners who require a dependable raw water cooling pump for their inboard diesel engines. It is ideal for those seeking a direct replacement or upgrade to ensure their engine's cooling system operates efficiently.
How It Compares
| Feature | DOMETIC Raw Water Pump M18-31604 | Johnson Pump |
|---|---|---|
| Material | Bronze Alloy | Bronze |
| Flow Rate @ 1500 RPM | 15 GPM | 14 GPM |
| Port Size | 1 inch | 1 inch |
Common Concerns Answered
Will this pump fit my specific engine model?
This pump is engineered as a direct replacement for many common marine diesel engines. Verify the port size and mounting configuration against your existing pump or engine manual for optimal fitment.
How often does the impeller need to be replaced?
Impeller replacement intervals vary based on operating conditions, but generally range from 500 to 1000 operating hours or annually to ensure peak performance and prevent system failure.
What is the expected lifespan of a bronze alloy pump?
A Dometic pump constructed with a bronze alloy housing offers exceptional resistance to saltwater corrosion, leading to an extended service life compared to less durable materials when properly maintained.
Frequently Asked Questions
What is the primary function of a raw water pump on a boat?
The raw water pump circulates external seawater through the engine's heat exchanger to dissipate excess heat generated during combustion, thereby maintaining optimal engine operating temperatures.
What does '15 GPM @ 1500 RPM' signify?
This specification indicates that the pump is capable of moving 15 gallons of water per minute when operating at an engine speed of 1500 revolutions per minute, a critical performance metric for engine cooling.
Are there specific maintenance procedures recommended for this Dometic pump?
Regular inspection and replacement of the neoprene impeller are essential maintenance tasks. Periodically check for any signs of wear, damage, or calcification on the impeller and housing.
Can this pump be used in freshwater cooling systems?
This pump is specifically designed for raw water (saltwater) cooling systems. For freshwater cooling, a different type of pump is required, typically circulating the coolant within the closed-loop system.
What is the significance of the bronze alloy construction?
Bronze alloy provides superior resistance to the corrosive effects of saltwater, ensuring the longevity and reliability of the pump in marine environments where it is constantly exposed to the elements.
