GCV170 Carburetor for Honda GCV200 HRN216 HRX217K6 Lawn Mower Pressure Washer Engine with GCV170LA S3B GCV200LA S3C Engine, Replace 16100-Z9L-811

What It Is

This is an aftermarket carburetor designed to replace the OEM Honda 16100-Z9L-811 unit. It meters fuel and air into the engine cylinder for combustion, and it’s intended for Honda GCV170 and GCV200 engines found on walk-behind mowers (HRN216, HRX217K6) and pressure washers.

Fitment & Compatibility

Before buying, confirm your engine model—this carb fits GCV170LA S3B and GCV200LA S3C engines specifically. Check the metal tag on your engine shroud (near the spark plug) for the full model code. It will not fit GCV160 or GCV190 engines, nor any Honda mower with a different carburetor mounting pattern. Measure the mounting bolt spacing (roughly 60mm center-to-center) and compare to your old unit. This is a direct bolt-on replacement, but you’ll need to reuse your original gaskets or purchase new ones separately. It’s not OEM Honda; it’s a compatible aftermarket part.

Key Things to Know

• Quality variance: This is a low-cost aftermarket unit. Expect a basic cast body and rubber gaskets. Some users report needing to adjust the idle mixture screw or clean out machining debris before installation.
• Installation difficulty: Moderate. You’ll need a socket set, screwdrivers, and possibly a small wire brush to clean the intake port. Expect 30–60 minutes if you’re handy; longer if you’ve never done carb work.
• Common gotchas: The fuel line may be a tight fit—use a heat gun or soak the hose in hot water to soften it. Do not over-tighten the mounting nuts; the plastic intake manifold can crack. Always install a new fuel filter (not included) to prevent debris from clogging the tiny jets.
• Tuning required: After installation, you’ll likely need to adjust the idle speed screw (on the throttle linkage) to get a smooth, steady idle. A tachometer helps but isn’t mandatory.

Should You Buy It

If your Honda GCV170 or GCV200 engine has a clogged, warped, or non-rebuildable OEM carb, this is a cheap fix that works for most users. It’s ideal for budget-minded DIYers who don’t mind minor tuning and are okay with a non-OEM part. Skip it if you want a guaranteed perfect fit or a premium rebuild kit—stick with an OEM Honda carburetor instead.