Partman Carburetor Kit for 14.5–21 HP Engines — 594593 Replacement with Air Filter & Spark Plug

Partman 594593 carburetor kit is a drop-in replacement assembly that restores fuel flow and air filtration for compatible 14.5–21 HP small engines.

This complete replacement kit includes a carburetor engineered to match OEM ports and linkages plus fuel filters, an air filter, and a spark plug so you can reinstall quickly and get equipment running. The unit is offered as a direct substitute for multiple part numbers (including 594593, 591731, 796109 and others) and supports a broad range of engine models commonly used in lawn tractors and garden machines.

Will this carburetor fit my engine model?

The Partman 594593 carburetor is designed to replace several factory part numbers and fits many 14.5–21 HP engine variants. Check your current part number and engine code against the listed compatible numbers before ordering. If the mounting holes, throttle linkage and fuel inlet align with your original, this kit is a suitable replacement.

• Replaces part numbers such as 594593, 591731, 796109, 593031, 593032.
• Compatible with engine model groups like 219977, 21B807, 21B906, and related codes.
• Works with an extensive list of 31-series engine variants (31A507 to 31P877 ranges).
• Confirm measurements and linkages before installation to ensure compatibility.

What comes in the box and why those parts matter?

The kit arrives ready for installation: one carburetor, two inline fuel filters, one replacement air filter, and one spark plug. Including these consumables saves time and avoids separate ordering, so you can address the common causes of running problems—clogged jets, dirty air intake, or worn spark components—in one service session.

• Carburetor assembled for direct replacement of worn or leaking units.
• Two fuel filters to prevent debris reaching the carburetor and engine.
• One paper or foam air filter to restore proper airflow and filtration.
• One standard spark plug to refresh ignition if the old plug is fouled.

How difficult is the installation and what tools will I need?

Installation is moderate in difficulty and can be completed with basic hand tools by someone comfortable with small-engine maintenance. Expect to spend 30–90 minutes depending on access and whether you'll transfer linkage and gaskets from the old unit. Follow safety steps: disconnect spark, work on a cool engine, and note linkage positions for accurate reassembly.

• Common tools: screwdrivers, socket set, pliers, and a gasket scraper if needed.
• Keep a clean workspace and photograph linkage positions before disassembly.
• Replace any damaged gaskets or seals not included in the kit for best results.
• Test-run engine and check for leaks after installation; adjust idle and mixture if required.

What maintenance improvements can I expect after replacing the carburetor?

Installing a fresh carburetor and filters typically restores steady idle, smooth throttle response, and cleaner starting behavior by eliminating blockages and degraded seals. While not a guaranteed cure for unrelated engine problems, a new carburetor often resolves fuel delivery issues caused by varnish, corrosion, or damaged diaphragms in the old unit.

• Smoother throttle transitions and reduced stalling during load changes.
• Improved starting reliability when combined with a fresh spark plug.
• Better fuel filtration lowers the risk of future carburetor clogging.
• May extend engine life by restoring correct air–fuel balance.

Who is this for: This Partman carburetor kit is best for homeowners, landscapers, and small-engine DIY mechanics who operate 14.5–21 HP lawn or garden equipment and need a reliable, ready-to-install replacement. Choose this kit when your engine shows rough idling, hard starting, fuel leaks, or when the OEM part numbers match the replacement list. It's ideal for preventive maintenance or restoring older equipment to dependable service.