Carburetor Replaces for Briggs and Stratton 498170 122H02-0199-B1 122H02-0220-B1 122H02-0871-B1

What It Is

This is an aftermarket carburetor designed to replace the OEM Briggs & Stratton 498170, fitting select 122H02-series engines (models 122H02-0199-B1, 122H02-0220-B1, 122H02-0871-B1). It supplies the correct air-fuel mixture for single-cylinder, vertical-shaft Briggs & Stratton engines typically found on walk-behind mowers, pressure washers, and small utility machines.

Fitment & Compatibility

Before buying, confirm your engine’s model number (stamped on the valve cover or blower housing) exactly matches one of the three listed: 122H02-0199-B1, 122H02-0220-B1, or 122H02-0871-B1. This carburetor is an aftermarket replacement, not OEM, so tolerances and gasket fit may vary slightly. Check that your fuel line diameter (usually 1/4-inch) and throttle linkage style match the unit. Measure the mounting bolt spacing (typically 2.5 inches center-to-center) and compare to your old carb. It does not include a fuel filter or primer bulb—reuse yours or buy separately.

Key Things to Know

• Quality variance: At this price point, expect thin gaskets and possible casting flash. Clean any debris from ports before installing.
• Installation difficulty: Moderate. You’ll need a screwdriver, socket set, and patience to adjust the idle mixture screw (usually 1.5 turns out as a starting point). Expect to tweak after installation.
• Common gotchas: The included gaskets may not seal perfectly—apply a thin layer of gasket sealant to the intake manifold side. Also, the throttle linkage hole can be slightly misaligned; you may need to file it or use a small zip tie as a retainer.
• Primer bulb compatibility: Some users report the primer bulb fits loosely—secure it with a dab of silicone or reuse your original bulb if possible.

Should You Buy It

If your engine model matches exactly and you’re comfortable with minor adjustments, this $11.85 carburetor is a budget-friendly way to fix a non-starting or rough-running mower. It’s not for someone who wants a bolt-and-go replacement—expect to spend 20-30 minutes tuning. For a perfect fit with zero fuss, spend more on an OEM unit.