3H and 4H Series Heater Core

The Heater Craft 3H and 4H Series Heater Core, specifically model H301, is a crucial component for marine heating systems, designed to keep boaters comfortable during chilly outings on the water. This American-made product offers superior durability and reliability, making it a popular choice among boat owners and DIY enthusiasts.

Key Features

The H301 heater core is specifically designed for 300 and 400 series heaters, offering the following specifications:

• Dimensions: 6.5" W x 16" L x 4" D
• Core pipe size: 5/8"
• Body depth: 2"
• Pipe depth: 4"
• Center to center on core pipes: 2 7/8"
• Offset to one side

Applications and Compatibility

This heater core is versatile and compatible with various marine heating systems:

• Replaces 300 (3 Vent), 340 (4 Vent), 360 (6 Vent), and 400 (Grill) Sport, Pro, and Elite systems
• OEM heater system used in popular boat brands such as Malibu, Axis, Mastercraft, Supra, Moomba, and Centurion

Installation Considerations

When installing the H301 heater core, keep in mind:

• The core is designed for hydronic marine heaters with 5/8" hose barbs.
• It's essential to check compatibility with your existing system, especially for boats manufactured before 2002.
• Proper planning of the mounting location and hose routing is crucial for a successful installation.

Frequently Asked Questions

How does the Heater Craft marine heater system work?
The Heater Craft system operates similarly to a car heater, using hot cooling water from the boat's engine and a variable-speed fan to distribute warm air through vents placed throughout the boat.

Can I install the H301 heater core in an older Heater Craft system?
If your system is older than 2002, you may need to replace the entire unit, including the core, blower, and box, as the H301 is not compatible with older-style boxes.

What maintenance is required for a boat heater system?
Regular maintenance includes checking hose connections, ensuring proper coolant levels, and cleaning or replacing air filters. It's also important to inspect the system before the start of each boating season.