751-10881 951-10881 Carburetor kit, Replacement for MTD 2P70M0C 2P70M0D 2P70MU, Replace# 12AGB2JA004 12AEB2JZ701 12AGB2JZ704, 20'' 21'' Lawn Mower

What It Is

This is an aftermarket carburetor kit designed to replace the fuel delivery system on select MTD 20- and 21-inch push mowers equipped with 2P70M0C, 2P70M0D, or 2P70MU engines. It handles fuel mixing and delivery to the cylinder for combustion.

Fitment & Compatibility

• Engine models: MTD 2P70M0C, 2P70M0D, 2P70MU (check your engine’s model tag—stamped on the blower housing or valve cover).
• Deck sizes: 20" and 21" mowers with those engines.
• OEM cross-references: Replaces MTD part #951-10881 and #751-10881, plus mower models 12AGB2JA004, 12AEB2JZ701, 12AGB2JZ704.
• Before buying: Measure the mounting bolt spacing (typically 2.5" center-to-center) and verify fuel line diameter (usually 3/16" or 1/4"). Also confirm your mower uses a side-draft or downdraft carb—this kit fits side-draft only.
• Note: This is an aftermarket part, not OEM MTD. It may require minor adjustment to the idle screw or throttle linkage for proper operation.

Key Things to Know

• Quality: Mixed reviews—some users report it works out of the box; others note a slightly lean fuel mixture that requires turning the high-speed needle 1/4 turn richer.
• Installation difficulty: Moderate. You’ll need to remove the air filter cover, fuel line, and two mounting bolts. Expect to clean old gasket residue and possibly adjust the float height (should be level with the bowl gasket surface when inverted).
• Common gotchas: The included gaskets may be thinner than OEM, potentially causing vacuum leaks. Apply a thin layer of fuel-resistant sealant to the bowl gasket if leaks occur. Also, the choke linkage may be slightly stiff—bend gently for free movement.
• Warranty: No mention of warranty from the seller; treat it as a disposable part.

Should You Buy It

If you’re on a tight budget and comfortable with basic carburetor tuning (idle and mixture screws), this kit is a functional fix for an MTD mower that won’t start or runs rough due to a clogged or failed carb. But if you want a guaranteed drop-in fit with no adjustments, pay extra for an OEM MTD carburetor—especially if your mower sees heavy commercial use.