The Wayne 20673 Blower Wheel is a critical combustion component engineered for integration with Wayne MSR Series oil burners. Measuring 4-1/4" in diameter with a 3" width, this blower fan is designed for high-RPM operation to draw essential combustion air through the burner housing. The unit features a 1/2" shaft bore and operates with a counterclockwise (CCW) rotation, ensuring the precise air-to-fuel ratio necessary for stable ignition and efficient thermal performance in residential and commercial heating systems. Constructed from high-grade materials to withstand the rigorous demands of industrial environments, this wheel serves as a direct replacement for several legacy part numbers, including 8.700-726.0, 078999, and 848577. Technicians should verify the rotation and bore dimensions against the existing motor shaft to ensure seamless HVAC burner maintenance and optimal airflow control across 120V and 230V oil burner models. OEM Compatibility: Specifically designed for Wayne MSR burners, ensuring exact fit and manufacturer-specified performance. Optimized Combustion: Precision-balanced blades maximize combustion air intake, reducing soot buildup and improving fuel efficiency. Broad Interchangeability: Direct cross-reference for 87007260 and 7-20673, simplifying inventory for service contractors. Durable Construction: Engineered to maintain structural integrity during high-speed rotation within enclosed burner assemblies. Common HVAC Technical Questions How do I confirm the rotation direction for the Wayne 20673? This wheel is designed for counterclockwise (CCW) rotation when viewed from the hub side. Installing a wheel with incorrect rotation will significantly reduce airflow and cause improper fuel combustion. What oil burner models is this wheel compatible with? The Wayne 20673 is primarily utilized in the Wayne MSR Series, including both 120V and 230V configurations. It is also frequently found in diesel-fired hot water pressure washers from brands like Hotsy, Landa, and Karcher. Does this blower fan include the set screw? Standard 1/2" bore blower wheels typically feature a pre-installed set screw for securing the wheel to the burner motor shaft, though technicians should always inspect the shaft for burrs before installation. This item is not eligible for free shipping. Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
