Banjo 3" Wet Seal Poly Transfer Pump with Honda GX390 (M350PH13W)

Approx. 500 GPM High-Flow Performance • Honda GX390 389cc Engine • Electric Start + Pull Rope • Tandem Wet Seal • 3" Polypropylene Pump

Move large volumes of water, fertilizer solutions, and compatible agricultural liquids quickly with the Banjo M350PH13W 3" Self-Priming Centrifugal Transfer Pump. Built around Banjo's high-flow M350 polypropylene pump and powered by a Honda GX390 389cc engine, this pump is designed for nurse trailers, tender trucks, sprayer filling, bulk-tank transfer, and other applications where reducing fill time matters.

The M350 platform combines corrosion-resistant polypropylene construction with Banjo's tandem wet seal system, an EPDM mechanical seal, stainless-steel hardware, and a 5-vane polypropylene impeller. The wet-seal configuration is designed to reduce seal wear and potential leak points while improving durability in demanding transfer applications.

Key Features & Benefits

• High-Volume 3" Transfer Pump
  Designed for applications that require moving large quantities of liquid quickly. Published flow information is approximately 500 GPM, depending on operating conditions.
• Honda GX390 Power
  Powered by a commercial-duty Honda GX390 389cc engine for dependable field operation.
• Electric Start with Pull-Rope Backup
  Convenient electric starting is complemented by a manual pull-rope starting system.
• Banjo Tandem Wet Seal Design
  Engineered to reduce seal wear, help protect against seal damage during high-pressure cleanout, and eliminate multiple potential leak points.
• Self-Priming V-Shaped Pump Body
  Designed for faster and easier priming in mobile transfer applications.
• Corrosion-Resistant Polypropylene Construction
  High-strength polypropylene pump components make the M350 well suited for compatible agricultural liquids, fertilizer solutions, and water transfer.
• 5-Vane Polypropylene Impeller
  High-performance impeller design supports the pump's high-flow capability.
• EPDM Mechanical Seal
  Provides dependable sealing performance for compatible liquids.
• Stainless-Steel Hardware
  Helps provide corrosion resistance in demanding agricultural environments.
• Handles Small Suspended Solids
  Capable of moving occasional suspended particles up to 1/2" in diameter.
• Extended Run-Dry Capability
  The Barn Door Ag listing states the M350 wet-seal design has a run-dry capability of greater than one hour. Proper priming and operating procedures should still be followed to maximize seal and pump life.

Honda GX390 Engine

The M350PH13W uses a Honda GX390 389cc engine with electric start. Barn Door Ag markets this configuration as a 13 HP Honda-powered pump and also specifies a pull-rope backup starting system.

The gasoline-powered configuration makes the pump self-contained for use on:

• Nurse trailers
• Tender trucks
• Agricultural sprayers
• Remote tank-transfer operations
• Field irrigation and water transfer
• Fertilizer-handling systems

No utility electrical supply is required for normal engine operation.

High-Flow M350 Pump

The Banjo M350 platform is designed around high-volume 3-inch liquid transfer. GNE publishes a capacity of up to 500 GPM, while Barn Door Ag describes the pump as capable of 500+ GPM. Actual transfer rate will depend on hose size, fittings, suction lift, discharge head, liquid characteristics, and the overall plumbing system.

For large agricultural operations, this higher flow capability can significantly reduce the amount of time spent filling sprayers, nurse tanks, and tender equipment compared with lower-capacity transfer pumps.

Tandem Wet Seal Technology

One of the key features of the M350PH13W is Banjo's tandem wet seal design.

According to the supplied product information, the design is intended to:

• Reduce seal wear
• Help prevent seal breakage during high-pressure cleanout
• Eliminate eight potential leak points
• Use natural system pressure to help maintain the seal
• Provide extended run-dry capability
• Improve reliability in high-volume liquid-transfer applications

This makes the M350 particularly well suited for agricultural operations where pumps may be used repeatedly throughout the day.

Handles Suspended Solids

The M350PH13W can handle occasional suspended solid particles up to 1/2" in diameter.

This does not make the unit a conventional trash pump. The feature is intended for occasional particles suspended in the liquid stream rather than continuous pumping of heavy solids, sludge, or abrasive debris.

Ideal Applications

The Banjo M350PH13W is designed for high-volume liquid-transfer applications such as:

• Agricultural sprayer filling
• Nurse trailer transfer
• Tender truck systems
• Fertilizer solution transfer
• Water transfer
• Bulk tank transfer
• Compatible agricultural chemical transfer
• Farm and ranch applications
• High-volume irrigation transfer

Always verify chemical compatibility with the pump's polypropylene construction, EPDM seal, and other wetted components before transferring liquids other than water.

Quick Specifications

The engine, material, seal, impeller, and suspended-solids specifications are supported by GNE, while the detailed operating data, weight, self-priming height, run-dry capability, and UPC are published by Barn Door Ag.

Package Contents

• 1 × Banjo M350PH13W 3" transfer pump
• Honda GX390 engine installed

Hoses, fittings, suction strainer, plumbing, battery, and other transfer-system accessories should not be assumed included unless specifically stated with the order.

Important Operating Information

For best performance, use properly sized suction and discharge plumbing and minimize unnecessary restrictions, fittings, and hose length. Actual GPM will vary significantly according to the installation.

When pumping fertilizers, agricultural chemicals, or other non-water liquids, verify compatibility with:

• Polypropylene
• EPDM
• Stainless steel
• All hoses, fittings, valves, and other wetted components in your system

Follow the manufacturer's priming, maintenance, and operating instructions even though the wet-seal design is published with extended run-dry capability.

Need a hose hose kit?  See our optional 3" Hose Kit w/ Quick Connect Couplers (BRHK3).  Kit is discounted when you purchase the pump at the same time.