Full product description

<p><strong>New aftermarket carburetor for select 14.5–21 HP Briggs & Stratton Intek single-cylinder engines; replaces 594593, 591731, and 794572 when the original configuration matches.</strong></p> <h2>Product Overview</h2> <p>Hard starting, hunting at governed speed, black smoke, or fuel leaking into the intake can all lead to the carburetor, but the repair begins with fresh fuel, a clean filter, and confirmation that the choke opens fully. This assembly is a sensible replacement when the original has varnished passages, a damaged seat, or excessive shaft wear.</p> <p>Intek engines with the same advertised horsepower can use different carburetors. Confirm the engine model/type/code and compare the fuel solenoid, choke, mounting flange, and linkage.</p> <h3>Key Features & Performance</h3> <ul> <li>For select Briggs & Stratton Intek single-cylinder engines</li> <li>Cross-references three common carburetor numbers</li> <li>Supports steady idle and governed mowing load</li> <li>Replacement option after stale fuel or internal carburetor damage</li> </ul> <h3>Compatible Models</h3> <ul> <li>Select Briggs & Stratton Intek single-cylinder engines rated 14.5–21 HP</li> <li>Briggs & Stratton engine applications originally using 594593, 591731, or 794572</li> </ul> <h3>Replaces Part Numbers</h3> <ul> <li>594593</li> <li>591731</li> <li>794572</li> </ul> <h3>Common Uses</h3> <ul> <li>Fixing a mower that hunts at steady throttle</li> <li>Repairing fuel flooding caused by a damaged carburetor</li> <li>Restoring a lawn tractor after off-season fuel deterioration</li> </ul> <h3>Technical Specifications</h3> <ul> <li> <strong>Product Type:</strong> Carburetor assembly</li> <li> <strong>Engine Family:</strong> Briggs & Stratton Intek single cylinder</li> <li> <strong>Horsepower Range:</strong> Select 14.5–21 HP applications</li> <li> <strong>Condition:</strong> New</li> <li> <strong>Replacement Type:</strong> Aftermarket</li> </ul> <h3>Installation & Fitment</h3> <ul> <li>Match the engine model, type, and code rather than horsepower alone</li> <li>Verify the fuel-shutoff solenoid connector and thread style</li> <li>Replace contaminated fuel and inspect the intake gasket</li> <li>Confirm choke travel, governor linkage, and leak-free operation</li> </ul> <h3>Compatibility Notice</h3> <p>Northline Parts does its best to list all known compatible models, but the correct part may fit an application not shown.</p> <p>Production date, engine type, transmission, trim, serial number, and previous repairs can change fitment. Compare the original part, mounting points, dimensions, connections, and listed reference numbers before purchase.</p> <h3>Frequently Asked Questions</h3> <p><strong>Q:</strong> Will this fit any 18.5 HP Briggs engine? <strong>A:</strong> No. Use 594593, 591731, or 794572 plus the full engine identification and physical comparison.</p><p><strong>Q:</strong> Can a stuck fuel solenoid cause a no-start? <strong>A:</strong> Yes. Verify power and solenoid movement before replacing the entire carburetor.</p><p><strong>Q:</strong> Why is gas entering the crankcase? <strong>A:</strong> A leaking inlet needle can allow fuel past the carburetor. Change contaminated oil before running the engine.</p><p><strong>Q:</strong> Are gaskets or accessories included? <strong>A:</strong> Purchase based on the listing photos and included-items field; reuse only serviceable intake hardware.</p> <h3>Part Summary</h3> <p>keywords: Briggs 594593 carburetor, 591731 carburetor replacement, 794572 Intek carburetor, 18.5 HP mower carb, Briggs single cylinder carburetor</p> <p><em>Brand names, model numbers, and reference part numbers are used for identification and compatibility purposes only. Verify the original component, dimensions, and application before purchase.</em></p>