MUF-1747.SIL Muffler for Honda GX340 & GX390 Engines

Fits Select Honda GX340 & GX390 Engines • Aluminized T125 Steel • Compact Exhaust Design • Direct-to-Engine Mounting

Replace a worn, damaged, or corroded exhaust system with the MUF-1747.SIL small engine muffler, designed for compatible Honda GX340 and GX390 horizontal-shaft engines. The current catalog identifies the MUF-1747.SIL as a silver muffler for the Honda GX390, while additional published product information also MIGHT have compatibility with the Honda GX340. 

Constructed from fully aluminized T125 steel, the MUF-1747.SIL is built to withstand the heat and corrosion associated with demanding commercial and industrial engine applications. Its compact exhaust design is intended to reduce engine exhaust noise while maintaining proper exhaust flow on compatible equipment.

Key Features & Benefits

• Fits Select Honda GX340 & GX390 Engines
  Published fitment includes select Honda GX340 and GX390 horizontal-shaft engines.
• Heavy-Duty Aluminized Construction
  Fully aluminized T125 steel provides excellent resistance to corrosion and high exhaust temperatures.
• Compact Muffler Design
  Built to provide effective exhaust silencing without an unnecessarily bulky exhaust assembly.
• Direct-to-Engine Mounting
  Published product support information states that the muffler mounts directly to the engine rather than to a separate exhaust manifold.
• 1.5" Outside-Diameter Exhaust Outlet
  Published outlet dimensions are approximately 1.375" ID × 1.5" OD, useful when connecting compatible exhaust accessories or extensions.
• Designed to Reduce Exhaust Noise
  Helps control exhaust sound while supporting normal engine operation. No specific decibel rating has been published because sound output varies by engine and application.
• Built for Equipment Applications
  Suitable for compatible generators, log splitters, pumps, pressure washers, compressors, construction equipment, and other machinery using the correct Honda engine and exhaust configuration.

Honda Engine Compatibility

Published fitment includes:

• Honda GX340
• Honda GX390

Current product specifically labels the MUF-1747.SIL as a muffler for the GX390, while other product listings identifies it for both GX340 and GX390 engines. Because exhaust configurations can vary by equipment manufacturer, engine model alone should not be used as the only fitment check.

Ideal Applications

Depending on the equipment's exhaust layout and available clearance, the MUF-1747.SIL may be suitable for:

• Log splitters
• Generators
• Air compressors
• Pressure washers
• Water pumps
• Construction equipment
• Agricultural equipment
• Industrial power units
• Other Honda GX340/GX390-powered machinery

Quick Specifications

The current catalog confirms SKU MUF-1747.SIL and identifies it as a GX390 muffler; additional current product data provides the GX340/GX390 compatibility, construction, outlet dimensions, and shipping weight.

Package Contents

• One MUF-1747.SIL muffler assembly

Engine, exhaust gaskets, mounting hardware, exhaust extensions, clamps, and other installation components should not be assumed included unless specifically supplied with the order.

Important Fitment Information

The MUF-1747.SIL is not universal. Before ordering, verify:

• Honda engine model
• Complete engine type and code
• Existing exhaust-port configuration
• Muffler mounting points
• Exhaust outlet location
• Equipment-frame clearance
• Existing exhaust dimensions and orientation

We specifically caution that replacement parts can be model- and revision-specific, so exact equipment fitment should be confirmed before purchase.