HIFROM Carburetor Replacement Kit for Tecumseh H25–H40 Engines — Direct-Fit Carb, Gasket & Air Filter (30727/30604 Compatible)

HIFROM replacement carburetor with gasket plus matching air filter restores airflow and fuel metering for many Tecumseh H25–H40 small engines.

If your lawn mower or small engine that uses Tecumseh part numbers 631921, 632284, 631070A and related models is running rough, hard to start, or using more fuel than normal, this HIFROM kit provides a direct-fit carburetor, replacement gasket and a compatible air filter to bring performance back. The kit is made to match common Tecumseh applications (H25, H30, H35, H40 series) and includes an air filter sized to the original specifications so installation is straightforward for most homeowner repairs.

Which engines and Tecumseh part numbers will this replacement fit?

This HIFROM kit is built to be compatible with several Tecumseh carburetor numbers and engine model families. It matches commonly used carburetors across H-series engines, covering a wide range of small gasoline engines on mowers and equipment.

• Direct carburetor compatibility: Tecumseh 631921, 631070/631070A, 631074, 631245, 631820, 632284.
• Engine model fit: H25, H30, H35, H40 families and similar variants.
• If unsure, provide your engine model and spec number to the seller for verification before ordering.

What comes in the package and what are the key dimensions?

The kit includes three items you need for a basic carburetor and air intake refresh. Dimensions are provided so you can confirm fitment against your existing parts before installation.

• Included: 1 carburetor, 1 gasket, 1 air filter (ready to install).
• Air filter size: outside diameter 3-3/4 inches, inside diameter 2-3/8 inches, height 2 inches.
• Recommended for engines rated roughly 2.5 through 8 HP that use the listed Tecumseh filter part numbers.

Which air filter and cross-references does this replace?

The filter supplied in the kit replaces several OEM and aftermarket part numbers, making it a convenient all-in-one maintenance option. It fits many small engines and some garden-equipment brands that share the same filter footprint.

• Compatible Tecumseh part numbers: 30727, 30604 and related LAV/H/HS/HH/VH series models.
• Cross-reference: Cub Cadet 488619/488619-R1, John Deere AM30900, LESCO 050113, Stens 100-008/100-0083.
• Suitable for AH600, AV600, HT135, TVM/TVS and other common H-series engine platforms.

How should I verify fitment and install this kit?

Before installation, compare part numbers and the filter dimensions to your existing components. Installation typically requires basic hand tools; replace the gasket and filter when fitting the new carburetor and follow common small-engine safety practices.

• Check your engine model and carburetor/spec number against the compatibility list.
• Drain fuel or work with a cool engine, remove old carburetor and gasket, fit new gasket, mount carburetor, then install the air filter.
• Adjust choke and throttle linkages as needed, and test-start to confirm proper idle and throttle response.

Who is this for: This HIFROM replacement carburetor, gasket and air filter kit is aimed at DIY homeowners, small-engine repair shops, and service technicians who maintain lawn mowers, generators, tillers and similar equipment powered by Tecumseh H-series engines. It’s ideal when the original carburetor or filter is clogged, leaking, or showing signs of wear and a quick, cost-effective repair is preferred over buying a new engine or machine.