Briggs & Stratton Carburettor - 594593

Direct replacement for degraded factory fuel delivery systems, utilizing precision float calibration to restore consistent air-fuel mixture ratios and eliminate stalling under load.

Key Features

• Pressurized float-feed architecture with brass needle valve and seat for reliable fuel isolation when the engine stops.
• Corrosion-resistant internal passages prevent octane rot and ethanol-related deposits common in modern gasoline blends.
• Polyethylene float calibrated for accurate waterline maintenance across multiple mower deck heights and side-slope operation.
• Pre-finished throttle shaft sleeve ensures smooth governor spring engagement without excessive rotational play.

Product Details

• Manufacturer: Briggs & Stratton
• Part Number: 594593
• Type: Float-type carburetor with integrated butterfly choke plate
• Housing Material: Cast aluminum venturi body with impact-resistant polymer mounting flange
• Fuel Inlet Configuration: Straight-barb fitting compatible with standard silicone or rubber inline tubing
• Throttle Shaft Diameter: 6.35 mm (1/4 inch)
• Included Components: Base seal gasket, wing nut, and retaining clip for direct bolt-in installation

Compatibility

• Direct substitute for OEM reference numbers: 590867, 591013, 493812S, 492386S, 797191, and 594036.
• Engine Series: Briggs & Stratton 500E, 550E, 600E, 650E, 700E/1000E Intek platforms, plus selected horizontal shaft motors rated between 5.5 and 11 HP.
• Application Range: Residential and commercial rotary mowers, ZTR operators, lawn tractors, and utility snow removal equipment.
• Installation Verification: Confirm existing flange bolt diameter and throttle rod attachment point geometry before finalizing purchase, as casting updates alter mounting patterns across production years.