[Lifetime Warranty] 791230 Carburetor Kit - Compatible with B&S 445677 405777 406777 407777 20-25 HP 4 Cycle V-Twin Engine, J-Deere LA120 LA130 LA135 LA140 LA150 LA145 - Replaces 799230 699709 499804 MIA10632

791230 Carburetor Kit

Key Features

• Optimized V-Twin Design:Specifically engineered for dual-cylinder engines to provide balanced fuel distribution and consistent combustion across both cylinders.
• Fuel Shut-Off Solenoid:Features an integrated 12V electromagnetic solenoid to prevent "after-fire" or backfiring by cutting fuel flow immediately when the ignition is turned off.
• Precision Machined Jets:Features upgraded internal venting and calibrated jets to ensure a stable idle and smooth power transition under heavy mowing loads.
• Complete Installation Kit:Includes the carburetor unit, high-quality mounting gaskets, and an fuel hardware refresh to ensure an airtight seal.

Replaces / Cross-Reference Part Numbers

• 791230
• 799230
• 699709
• 499804
• 499809
• MIA10632
• MIA12048
• GY20962

Compatibility & Fitment

• Briggs & Stratton Engines:405777, 406777, 407777, 441777, 442577, 445677, 445705, 445777, 445877, 445977.
• John Deere LA Series:LA120, LA130, LA135, LA140, LA145, LA150.
• John Deere L/D Series:L111, L118, L120, D130, D140.
• Other Brands:Fits various Craftsman, Husqvarna, and Poulan Pro models equipped with the B&S V-Twin engine series listed above.

When to Replace

• Fuel in Oil:A failing internal needle or seat can cause fuel to leak into the crankcase, thinning the oil and risking engine failure.
• Backfiring:Occurs when the fuel solenoid fails to close properly or the air-fuel mixture is excessively lean.
• Surging at High Speed:The engine "hunts" for RPMs, indicating a partial blockage in the main high-speed jet or internal passages.
• Leaking Fuel:Visible fuel dripping from the carburetor bowl or the air intake throat.
• Hard Starting/No Start:The engine cranks but will not fire, often due to gummed-up passages from ethanol-blended fuel left in the system over winter.

Installation Tips

• Safety First:Work in a well-ventilated area, wear eye protection, and disconnect the battery to prevent the fuel solenoid from sparking.
• Gasket Surface:Thoroughly clean the intake manifold and air cleaner base surfaces; any old gasket material left behind will cause an air leak and poor performance.
• Solenoid Connection:Ensure the wire lead to the fuel solenoid is securely connected and the ground is clean to ensure the valve opens when the key is turned.
• Linkage Setup:Take a photo of the governor and choke linkage positions before removing the old carburetor to ensure identical reassembly.
• Fuel Refresh:Always drain old fuel and replace the fuel filter when installing a new carburetor to prevent immediate contamination of the new unit.