Boxxer™ 421

• Specifications
• Standard Equipment & Options
• Owner's Manual
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Boxxer 421

Briggs & Stratton® Vanguard™ Engine

• Fuel-Efficient 21 HP Engine
• Dependable 2 Cylinder OHV Design
• External Oil Cooler
• Keyed Ignition
• Engine Choke and Throttle

Dominator™ 4005 Tri-Lobe Blower

• Exclusive HydraMaster Design
• Low Vibration - Pulsation and Sound Reduced
• Oil Bath Lubrication, No Grease Fittings
• Oil Level Sight Windows
• Durable Helical Gear Drive
• 2 Year Warranty

High Pressure Pump

• 3.5 GPM Capacity
• Operating Pressure, 0 to 1,000 PSI
• Clean Grout, Tile or Pressure Wash
• Electric Clutch Activated

Multi-Stage Heat Exchangers

• Advanced Heat Exchanger System
• 250°F Maximum Temperature, Up to 220°F Operating Range
• Dual Pass Stainless Steel Coil Engine Exhaust Exchanger
• Tube and Fin Blower Exhaust Exchanger

Last-Step Chemical System

• Equipped with HydraMaster’s Chemical Pulse Pump. Last-Step Chemical Injection means no chemicals pass through the water pump or heat exchangers.