AUTOKAY Carburetor Replacement for 14-18HP Intek & Toro Riding Mowers — Model 594593/591731, Rebuild Kit with Gaskets & Fuel Filte

AUTOKAY's 594593 / 591731 carburetor is a full replacement carburetor assembly designed to restore fuel delivery on compatible 14–18 HP Intek engines and many Toro riding mowers.

This rebuild-style carburetor kit from AUTOKAY replaces multiple OE part numbers and arrives with the common gaskets, clamps, fuel line, filter, spark plugs and shut-off valve needed for a straightforward installation. It’s engineered to match the key inlet, throttle and choke geometry of engines that list 591731, 594593, 697141 and related numbers, so you get reliable fitment across many Intek and Toro models without hunting for hard-to-find OEM parts.

Which engines and mower models will this AUTOKAY carburetor fit?

The AUTOKAY carburetor is specified to replace several common part numbers and is compatible with a wide family of Intek and Nikki engines, plus many Toro riding mower part numbers. Fitment covers 14–18 HP Intek engines and specific Nikki codes, as well as Toro model numbers used on residential riding mowers.

• Direct replacement for part numbers: 591731, 594593, 796109, 593514 and many listed variants.
• Fits Intek 14 HP, 17.5 HP and 18 HP engine families (280H06, 280J07, 285H07, 286H07 series).
• Compatible with multiple Toro riding mower model numbers such as 71427, 74325, 74419 and others.

What comes in the package and what do I need to install it?

The kit ships with the main carburetor body plus a set of common replacement consumables so you can complete the swap in one visit. Basic hand tools and a short period of tuning may be required after installation to optimize idle and throttle response.

• Included: 1 carburetor, 1 gasket, 2 clamps, 1 fuel line, 1 fuel filter, 1 shut-off valve and 1 spark plug.
• Tools needed: screwdriver set, pliers, adjustable wrench, and a small fuel pan for draining fuel.
• Post-install: brief idle/mixture adjustment and leak check recommended before full use.

How does this replacement carburetor affect performance and reliability?

Replacing a worn or blocked carburetor with this AUTOKAY assembly restores correct fuel metering, which often eliminates rough idle, hard starting and poor throttle response. While it won’t change engine power ratings, a properly fitted carburetor improves day-to-day dependability and reduces fuel-flow related issues.

• Restores consistent fuel delivery and easier starting when compared to old, clogged units.
• Includes a new fuel filter and shut-off valve to prevent contaminants and leaks.
• Designed to match OEM mounting and linkage points for secure, vibration-resistant fit.

Are there installation tips or compatibility checks I should make first?

Confirm the engine part number stamped on your engine's block or OEM parts list before ordering. Match mounting bolt locations, throttle and choke cable orientations, and the fuel inlet size to ensure the AUTOKAY carburetor will install without modification.

• Verify your engine uses one of the listed part numbers (e.g., 591731, 697141 series) or a compatible engine code like 31A507 variants.
• Compare the carburetor flange pattern and linkage geometry with the old unit for a visual match.
• Drain the old fuel and clean the mounting surface before fitting the new gasket to prevent leaks.

Who is this for: This AUTOKAY carburetor kit is aimed at homeowners, lawn care technicians and small-engine repair shops who need a cost-effective, ready-to-install replacement for Intek and Nikki 14–18 HP engines or Toro riding mowers. It’s especially useful when the original carburetor is clogged, leaking, or beyond economical repair and you want a complete kit that includes seals and fuel components for a single-visit repair.