GCV170 Carburetor for Honda GCV170LA GCV200LA HRN216 HRX217K6 Lawn Mowers Compatible with GCV170LA G5B G5BR S3B Engine Replace 16100-Z9L-811

What It Is

This is a replacement carburetor for Honda GCV170 and GCV200 series engines, commonly used on Honda HRN216 and HRX217K6 walk-behind mowers. It meters fuel and air into the engine for combustion and is a direct fit for engines like the GCV170LA G5B, G5BR, and S3B.

Fitment & Compatibility

Before buying, confirm your engine model—look for a stamped code on the engine shroud (e.g., GCV170LA, GCV200LA). This carb replaces Honda OEM part 16100-Z9L-811. It fits HRN216 and HRX217K6 mower decks (21-inch typically) but not all Honda mowers—verify your engine series, not just mower model. Measure mounting bolt spacing (about 60mm center-to-center) and check if your throttle/choke linkage matches. This is an aftermarket part, so expect minor cosmetic differences from OEM, but dimensions are identical.

Key Things to Know

• Quality: Aftermarket carb; may need a slight idle mixture adjustment (screw on side) for optimal performance. Works well for most users but not as durable as OEM.
• Installation difficulty: Moderate. You’ll need a screwdriver, socket set, and possibly a carburetor gasket set (not included). Clean the intake manifold before installing.
• Common gotchas: The plastic float bowl can be brittle—don’t overtighten screws. Also, old fuel lines may crack when disconnected; have replacements handy.
• Fuel system prep: Drain old fuel and clean the tank before install. If your mower sat with ethanol gas, the carb may be clogged anyway—this replacement solves that.

Should You Buy It

If your Honda GCV170 or GCV200 mower is hard-starting, surging, or won’t run due to a clogged or worn carb, this is a budget-friendly fix. It’s ideal for DIYers comfortable with basic engine work who want to avoid a $60+ OEM part. Not for professionals needing long-term reliability—stick with OEM for heavy commercial use.