GoaMotors carburetor for Craftsman Intek OHV 19–21 HP riding mower — direct-fit Nikki-style replacement, improved idle

High-quality replacement carburetor engineered to fit Craftsman Intek OHV 19–21 HP riding mower engines and restore reliable fuel delivery.

If your Craftsman riding mower powered by an Intek OHV engine (19, 19.5, 20, 20.5, or 21 HP) is sputtering, running rough, or difficult to start, the carburetor is often the first component to check. The GoaMotors carburetor is designed as a direct-fit aftermarket alternative to Nikki-style carbs and cross-references common Craftsman interchange numbers to help you find the correct replacement quickly.

Will this carburetor work with my mower model?

This GoaMotors unit is built to match the mounting, throttle linkage, and fuel inlet orientation of many Craftsman Intek OHV engines in the 19–21 HP range. Before ordering, compare the part numbers stamped on your old carburetor or in your owner’s manual to the interchange list provided.

• Compatible engine sizes: 19, 19.5, 20, 20.5, 21 HP Intek OHV
• Works with Nikki-style carburetor setups commonly found on Craftsman tractors
• Cross-reference numbers: 591736, 594601, 591731, 796109, 796078, 590400, 31H777
• Confirm fit by matching your existing carb’s part number and mounting pattern

How does installation typically go and what tools are needed?

Installation is straightforward for a basic home mechanic with standard hand tools. You’ll remove the air filter assembly, disconnect the fuel line and throttle linkage, unbolt the old carburetor, then reverse the steps for the new unit. A clean gasket surface and correct torque ensure a leak-free fit.

• Tools: socket set, screwdrivers, pliers, gasket scraper
• Steps: remove air cleaner, disconnect fuel/throttle, unbolt carburetor, install new carburetor with new gasket
• Tip: use fresh gaskets and inspect fuel lines while installing
• Time: typically 30–60 minutes depending on access and experience

What performance improvements should I expect after replacing the carburetor?

Replacing a worn or clogged carburetor can restore consistent idling, smoother throttle response, and easier starting. While this part addresses fuel metering and flow, overall performance also depends on clean fuel, a functioning ignition system, and a fresh air filter.

• Benefits: improved idle stability and throttle response
• May eliminate hard starts and engine stumbling under load
• Not a substitute for fuel system cleaning or ignition troubleshooting
• Recommended: fresh fuel and new gaskets for best results

Which part numbers does this carburetor replace and why cross-references matter?

GoaMotors lists interchange numbers so you can match this aftermarket carburetor to the original equipment part number. Cross-references reduce guesswork and help ensure compatibility with your specific Craftsman engine configuration.

• Interchange list: 591736, 594601, 591731, 796109, 796078, 590400, 31H777
• Cross-referencing avoids mistakes caused by similar-looking but incompatible carbs
• Verify by comparing your old carb’s stamped number or owner’s manual listing

Who is this for? The GoaMotors replacement carburetor is intended for DIY lawn tractor owners, small-engine mechanics, and fleet caretakers who need a cost-effective, direct-fit carburetor for Craftsman Intek OHV 19–21 HP riding mowers. It’s a practical option when the existing carburetor shows signs of clogging, fuel leakage, poor idle, or inconsistent performance — provided you confirm the part number match before purchase.