791858 Carburetor Air Filter Fuel Line Filter Kit Compatible with Briggs & Stratton 591731 593433 594593 653202 698620 697190 699109 791858 792768 794572 796109 14-18hp Craftsman Lawn Tractor Mower

What It Is

This is a complete fuel and air system service kit for Briggs & Stratton single-cylinder engines (14-18 hp) used in Craftsman lawn tractors and mowers. It includes a carburetor, air filter, fuel filter, and fuel line—everything needed to replace worn-out fuel delivery components.

Fitment & Compatibility

Before buying, confirm your engine’s model number (stamped on the blower housing or valve cover). This kit replaces OEM part numbers 591731, 593433, 594593, 653202, 698620, 697190, 699109, 791858, 792768, 794572, and 796109. It fits most Craftsman lawn tractors with 42-inch or 46-inch decks and Briggs & Stratton 14-18 hp engines (e.g., 31C707, 31P977, 44N877). Do not rely on mower model alone—engine model numbers vary even within the same mower. Also measure your fuel line inner diameter (typically 1/4” or 5/16”) to ensure the included fuel line matches.

Key Things to Know

• Quality vs. OEM: This is an aftermarket kit. Most users report it works well, but some note the carburetor gaskets may be thinner than OEM—use the included gaskets, not old ones.
• Installation difficulty: Moderate. You’ll need basic hand tools (screwdrivers, pliers) and about 30-60 minutes. The hardest part is often removing the old carburetor’s mounting bolts.
• Common gotcha: The fuel line may be slightly stiff—soak the ends in hot water for 30 seconds to soften before sliding onto barbs. Also, drain the gas tank first to avoid spills.
• Check spark plug clearance: The new carburetor’s shape may slightly shift the air filter housing—ensure it doesn’t contact the spark plug wire or engine shroud.

Should You Buy It

If your Craftsman lawn tractor is surging, hard to start, or leaking fuel, this kit is a cost-effective fix. It’s ideal for DIY owners who want a one-box solution instead of sourcing individual parts. Skip it if you prefer OEM-only parts or if your engine model isn’t listed—fitment is specific, not universal.